Updated on 2024/04/08

写真a

 
Takigawa Yorinobu
 
Organization
Graduate School of Engineering Division of Science and Engineering for Materials, Chemistry and Biology Professor
School of Engineering Department of Materials Science
Title
Professor
Affiliation
Institute of Engineering

Position

  • Graduate School of Engineering Division of Science and Engineering for Materials, Chemistry and Biology 

    Professor  2022.04 - Now

  • School of Engineering Department of Materials Science 

    Professor  2022.04 - Now

Degree

  • 博士（工学） （ Others ）

Research subject summary

  • 多結晶材料の粒界塑性に関する研究

  • 材料の変形と破壊に関する研究

  • ナノ結晶材料創製に関する研究

Professional Memberships

  • 表面技術協会

    2008.02 - Now

  • 軽金属学会

    2007.10 - Now

  • 日本機械学会

    2006.01 - Now

  • 粉体粉末冶金協会

    2004.04 - Now

  • 日本バイオマテリアル学会

    2000.07 - Now

  • 日本材料学会

    2000.04 - Now

  • 日本セラミックス協会

    1998.04 - Now

  • 日本金属学会

    1998.04 - Now

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Awards

  • 論文賞

    2020.11   軽金属学会  

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    Country：Japan

  • 日本金属学会技術開発賞

    2009.09   日本金属学会  

  • 第18回先端技術大賞　産経新聞社賞

    2009.07   フジサンケイビジネスアイ  

  • 平成19年度日本材料学会学術奨励賞

    2008.05   日本材料学会  

  • 日本金属学会第51回論文賞（力学特性部門）

    2003.10   日本金属学会  

  • 日本金属学会第47回論文賞（力学特性部門）

    1999.11   日本金属学会  

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Papers

  • Fatigue properties and toughness in flame-resistant magnesium alloys and influences of welding

    Tanaka Tsutomu, Oguri Taizo, Hamada Naoyuki, Uchida Sohei, Hirata Tomotake, Takigawa Yorinobu

    Journal of Japan Institute of Light Metals   74 ( 2 )   105 - 110   2024.02（ ISSN:04515994 ）

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    <p>This study investigates the fatigue properties, Charpy impact energy, and fracture toughness of three flame-retardant magnesium alloys with the different amount of aluminum solid solution. These properties strongly depended on the amount of aluminum dissolved in the magnesium alloy. Micro-strain analysis was used to evaluate the degree of damage during fatigue tests. This method could successfully evaluate the degree of damage by focusing on the principal slip plane rather than the crystallographic planes. In addition, we examined the influence of welding, wherein AZX811 filler metals containing Ga were used, on Charpy impact energy and fracture toughness. The Charpy impact energy of the welded joint was lower than that of the base metal with the same amount of aluminum solid solution. However, the fracture toughness value of the welded joint was almost the same as that of the base metal. This was because the welding defects decreased the Charpy impact absorbed energy. However, they did not affect the fracture toughness value owing to the microscopic elastoplastic behavior of the crack tip. Furthermore, a proportional relationship between the impact-absorbed energy and fracture toughness value was determined for both the base metal and welds.</p>

    DOI： 10.2464/jilm.74.105

  • 中足趾節関節の背屈運動が可能なソールを内装した油圧調整式短下肢装具による脳卒中片麻痺者の蹴り出しの変化

    古屋 美紀, 鈴木 淳也, 斎藤 聡佳, 瀧川 順庸, 神尾 昭宏, 藤田 暢一, 米津 亮, 宮谷 定行, 淵岡 聡, 清水 順市, 平田 恵介, 藤本 庸浩

    日本義肢装具学会誌   39 ( 4 )   308 - 314   2023.10（ ISSN:0910-4720 ）

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    我々は,脳卒中片麻痺者(片麻痺者)の蹴り出し改善を目的に,中足趾節関節の背屈が可能なソールを開発した.本研究の目的は,開発したソールが片麻痺者の蹴り出し改善に寄与するか検討することである.対象は自立歩行が可能な片麻痺者10名である.これらの対象者に,既存の油圧調整式短下肢装具(従来型)と我々が考案したソールを内装したもの(改良型)を用意し,歩行動作を記録した.その結果,改良型は従来型と比較し,前遊脚期の足関節底屈抵抗トルクが有意に増加した(p<0.01).さらに,単脚支持期における腓腹筋の最大振幅値が有意に増加した(p<0.01).これらの知見から,中足趾節関節の背屈運動が可能なソールによって,歩行中の効率的な足関節底屈運動を導引し,片麻痺患者の力強い蹴り出しに寄与することが示唆された.(著者抄録)

  • Effect of Additional Element on Local Mechanical Properties of High Purity Aluminum Alloys by Nanoindentation

    Terasaki Yasuhiro, Mochizuki Takafumi, Kobata Junpei, Yamamoto Takahisa, Takigawa Yorinobu

    Journal of the Japan Institute of Metals and Materials   87 ( 7 )   219 - 225   2023.07（ ISSN:00214876 ）

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    Publishing type：Research paper (scientific journal)  

    <p>Nanoindentation tests were performed on high purity aluminum and its alloys to clarify the effects of the types of additional elements and the effects of interactions between additional elements and grain boundaries or existing dislocations on local mechanical properties. The samples used were ultrahigh purity 5N-Al and high purity Al-Fe, Mn, Cu, Zr and Zn alloys processed by solution annealing or friction stir process (FSP). The results of nanoindentation hardness revealed that the amount of each element and the misfit had a significant effect on deformation resistance of plastic deformation in solution annealed samples. On the other hand, the results for the FSPed samples showed that the existing dislocations introduced by FSP have a significant effect on the plastic resistance. From the values of the nanoindentation hardness ratio of the grain boundary to the grain interior, it is concluded that the segregation effect of the additional elements at the grain boundary on the plastic resistance is small in solution annealed samples and FSPed samples. The results of critical load at pop-in revealed that elements with large misfit act as dislocation sources in solution annealed samples. For the FSPed samples showed that the density of existing dislocations introduced by FSP has a significant effect on the critical load for dislocation generation.</p>

    DOI： 10.2320/jinstmet.j2023001

  • Microstructure and tensile strength of electrodeposited Fe-rich bcc FeCoNi medium-entropy alloys

    A. Watanabe, T. Yamamoto, R. Miyamoto, Y. Takigawa

    Materials Science and Technology   39 ( 15 )   2028 - 2034   2023.03（ ISSN:0267-0836 ）

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1080/02670836.2023.2187973

  • Tensile strength of nanocrystalline FeCoNi medium-entropy alloy fabricated using electrodeposition Reviewed

    Atsuya Watanabe, Takahisa Yamamoto, Yorinobu Takigawa

    Scientific Reports   12 ( 1 )   12076   2022.12

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   International / domestic magazine：International journal  

    Abstract

    Crystal-grain refinement is one of the effective approaches to obtaining high-strength materials. A good strength/ductility balance has been reported in fine grains of high- and medium-entropy alloys. However, crystal-grain refinement at the nanometer scale has not been achieved yet. In this study, we used electrodeposition to fabricate 0.2-mm thick equiatomic FeCoNi medium-entropy alloys (MEAs) with 10-nm crystal grains. The nanocrystalline FeCoNi MEAs exhibit the maximum tensile strength of 1.6 GPa, which is the highest reported result to date.

    DOI： 10.1038/s41598-022-16086-6

    PubMed

    Other URL： https://www.nature.com/articles/s41598-022-16086-6

  • 電析ナノ結晶Ni合金の超塑性接合 Reviewed

    兼山凱，瀧川順庸

    日本金属学会誌   86 ( 9 )   176 - 180   2022.09

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    Authorship：Last author,　Corresponding author   Kind of work：Joint Work  

    DOI： 10.2320/jinstmet.J2022007

  • Effect of Boron and Tungsten Addition on Superplasticity and Grain Growth in　Electrodeposited Nickel Alloys Reviewed

    G. Kaneyama, H. Koto and Y. Takigawa

    63 ( 7 )   1001 - 1005   2022.07

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    Authorship：Last author,　Corresponding author   Kind of work：Joint Work  

  • New dislocation dissociation accompanied by anti-phase shuffling in the α'' martensite phase of a Ti alloy Reviewed

    Masaki Tahara, Nao Otaki, Daichi Minami, Tokuteru Uesugi, Yorinobu Takigawa, Kenji Higashi, Tomonari Inamura, Hideki Hosoda

    Acta Materialia   227   117705 - 117705   2022.02

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    Publishing type：Research paper (scientific journal)   Kind of work：Joint Work  

    DOI： 10.1016/j.actamat.2022.117705

  • Fabrication of Ti-Alloy Powder/Solid Composite with Uniaxial Anisotropy by Introducing Unidirectional Honeycomb Structure via Electron Beam Powder Bed Fusion Reviewed

    Naoko Ikeo , Tatsuya Matsumi , Takuya Ishimoto , Ryosuke Ozasa , Aira Matsugaki , Tadaaki Matsuzaka , Ozkan Gokcekaya , Yorinobu Takigawa ，Takayoshi Nakano

    Crystals 雑誌 ＭＤＰＩ   11   2021.09

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    Kind of work：Joint Work  

  • Fabrication of Ti-Alloy powder/solid composite with uniaxial anisotropy by introducing unidirectional honeycomb structure via electron beam powder bed fusion

    Naoko Ikeo, Tatsuya Matsumi, Takuya Ishimoto, Ryosuke Ozasa, Aira Matsugaki, Tadaaki Matsuzaka, Ozkan Gokcekaya, Yorinobu Takigawa, Takayoshi Nakano

    Crystals   11 ( 9 )   2021.09

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    Publishing type：Research paper (scientific journal)  

    In this study, a Ti–6Al–4V alloy composite with uniaxial anisotropy and a hierarchical structure is fabricated using electron beam powder bed fusion, one of the additive manufacturing techniques that enable arbitrary fabrication, and subsequent heat treatment. The uniaxial anisotropic deformation behavior and mechanical properties such as Young’s modulus are obtained by introducing a unidirectional honeycomb structure. The main feature of this structure is that the unmelted powder retained in the pores of the honeycomb structure. After appropriate heat treatment at 1020◦C, necks are formed between the powder particles and between the powder particles and the honeycomb wall, enabling a stress transmission through the necks when the composite is loaded. This means that the powder part has been mechanically functionalized by the neck formation. As a result, a plateau region appears in the stress–strain curve. The stress transfer among the powder particles leads to the cooperative deformation of the composites, contributing to the excellent energy absorption capacity. Therefore, it is expected that the composite can be applied to bone plates on uniaxially oriented microstructures such as long bones owing to its excellent energy absorption capacity and low elasticity to unidirectionally suppress stress shielding.

    DOI： 10.3390/cryst11091074

  • High-Strength BCC FeCoNi Medium-Entropy Alloy With Fine Grains Fabricated Using Electrodeposition

    Atsuya Watanabe, Takahisa Yamamoto, Ryousuke Miyamoto, Yorinobu Takigawa

    SSRN Electronic Journal   2021

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.2139/ssrn.3972720

  • Microstructural heterogeneity in the electrodeposited Ni: insights from growth modes

    Isao Matsui, Atsuya Watanabe, Yorinobu Takigawa, Naoki Omura, Takahisa Yamamoto

    Scientific Reports   10 ( 1 )   2020.12

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    Publishing type：Research paper (scientific journal)  

    Microstructures of electrodeposited Ni were studied from the perspective of growth modes during electrodeposition. The electrodeposited Ni had a heterogeneous microstructure composed of nanocrystalline- and microcrystalline-grains. Electron backscatter diffraction analyses showed that nanocrystalline- and microcrystalline-grains were preferentially oriented to specific planes. Secondary ion mass spectrometry also revealed that coarse-grained regions had higher S content than that of finer-grained regions. Hence, microstructural heterogeneity in electrodeposited Ni is reflected by the overlap of inhibited and free growth modes. Our discussion surrounding microstructural heterogeneity also provides insight into other electrodeposited nanocrystalline systems.

    DOI： 10.1038/s41598-020-62565-z

    PubMed

  • Prediction System for SolidSolubility Limits of Ag-, Cu-, Al-, and Mg-Based Alloys Using Artificial　Neural Networks and First-Principles Calculations Reviewed

    T. Mochizuki, T. Uesugi and Y. Takigawa,

    Materials　Transactions 雑誌 The Japan Institute of Metals   61   2083 - 2090   2020.11

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    Kind of work：Joint Work  

  • Reducing sulfur to improve thermal embrittlement in electrodeposited nickel　using citric acid Reviewed

    Atsuya Watanabe , Yorinobu Takigawa，

    Results in Surfaces and Interfaces 雑誌 ELSEVIER   1   1 - 8   2020.11

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    Kind of work：Joint Work  

  • Reducing sulfur to improve thermal embrittlement in electrodeposited nickel using citric acid

    Atsuya Watanabe, Yorinobu Takigawa

    Results in Surfaces and Interfaces   1   100001 - 100001   2020.11（ ISSN:2666-8459 ）

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.rsurfi.2020.100001

  • Prediction system for solid solubility limits of Ag-, Cu-, Al-, and Mg-based alloys using artificial neural networks and first-principles calculations

    Takafumi Mochizuki, Tokuteru Uesugi, Yorinobu Takigawa

    Materials Transactions   61 ( 11 )   2083 - 2090   2020.09（ ISSN:1345-9678 ）

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    Publishing type：Research paper (scientific journal)  

    A solid solubility prediction system using Hume-Rothery parameters and first-principles calculation to obtain explanatory variables was devised, and the resulting coefficients of determination, R2, were compared. When we used the Hume-Rothery parameter, R2 was 0.715, and when we used the first-principles calculation results, R2 was 0.900, indicating the improved accuracy of prediction. We tested 10-fold cross validation to evaluate the generalization performance of the network. The number of explanatory variables was optimized using the stepwise method. R2 was maximized when eight explanatory variables were used. As a result of 10-fold cross-validation, R2 of the constructed solid solubility prediction system which uses eight explanatory variables was 0.6993. The mean absolute error for this network was 0.45. The common logarithm value was used as the explained variable. Thus, the solid solubility limit predicted from this network was on an average 0.35 to 2.85 times the true value.

    DOI： 10.2320/matertrans.MT-MBW2019010

  • Microstructural heterogeneity in the electrodeposited Ni: insights from growth modes Reviewed

    I. Matsui, A.Watanabe, Y.Takigawa, N. Omura, T.Yamamoto

    Scientific Reports 雑誌   10   2020.03

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    Kind of work：Joint Work  

  • Mechanical properties and microstructures after abnormal grain growth in electrodeposited Ni–W alloys Reviewed

    I. Matsui, A.Watanabe,T.Uesugi, N. Omura,Y.Takigawa,T.Yamamoto

    Materialia 雑誌 ELSEVIER   8   2019.12

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    Kind of work：Joint Work  

  • Mechanical properties and microstructures after abnormal grain growth in electrodeposited Ni–W alloys Reviewed

    Isao Matsui, Atsuya Watanabe, Tokuteru Uesugi, Naoki Omura, Yorinobu Takigawa, Takahisa Yamamoto

    Materialia   8   2019.12

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    Publishing type：Research paper (scientific journal)  

    © 2019 The thermal stability of electrodeposited Ni–W alloys has been identified to be due to W segregation. Although a kinetic contribution has been recently proposed, namely, the formation of W-oxides at grain boundaries (GBs) by annealing, the formation mechanism is unclear. In this study, we annealed electrodeposited Ni–W alloys up to 600 °C; then, we examined the mechanical properties and microstructures to deeply understand the thermal stability of Ni–W alloys. Mechanical testing of annealed alloys demonstrated that the proof stress and hardness increased against the increase in annealing temperature in the range of 380–450 °C. At the mesoscale, microstructure observations revealed that the grain size was reduced with increasing temperature from 390 to 450 °C. Finer-grained microstructures were maintained up to the annealing temperature of 520 °C. At the nanoscale, grain boundary structures were directly observed, and the chemistry was also demonstrated. These nanoscale analyses detected S segregation at GBs and triple junctions, whereas oxides and precipitates likely to affect grain growth were not identified. Our results and discussion indicate that transition in the grain size after annealing can be explained by the conventional relationship between the annealing temperature and frequency of abnormal growth grains.

    DOI： 10.1016/j.mtla.2019.100481

  • Al–7.3 mass%Mg合金の粒界破壊に及ぼす微量Fe添加の影響 Reviewed

    大手　里奈, 山田　貴洋, 上杉　徳照, 瀧川　順庸, 東　健司

    軽金属 雑誌 軽金属学会   69 ( 9 )   457 - 464   2019.09

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    Kind of work：Joint Work  

  • Al-8Mg alloy with high strength and high ductility by addition of a grain boundary strengthening element Reviewed

    Masaki Ninomiya, Rina Ohte, Tokuteru Uesugi, Yorinobu Takigawa, Kenji Higashi

    Materials Letters   245   218 - 221   2019.06（ ISSN:0167-577X ）

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    © 2019 An Al-8Mg-based alloy with high strength and high ductility was developed by adding a grain boundary strengthening element. Zr was predicted to be the most effective element for grain boundary strengthening at 298 K from first-principles calculations. Then, an Al-8Mg-0.2Zr alloy was developed. Grain boundary analysis by high-angle annular dark-field scanning transmission electron microscopy and Auger electron spectroscopy revealed that the added Zr segregated at grain boundaries in the Al-8Mg-0.2Zr alloy. The Al-8Mg-0.2Zr alloy exhibited tensile elongation of 49% with transgranular fracture, whereas the Al-8Mg alloy exhibited tensile elongation of 28% with intergranular fracture after tensile tests at room temperature. We succeeded in developing a high strength and high ductility Al-8Mg-0.2Zr alloy which compensates for the trade-off between strength and ductility in comparison with commercial Al alloys.

    DOI： 10.1016/j.matlet.2019.03.015

  • Ductile electrodeposited Al from a dimethylsulfone bath with trace amounts of tin chloride Reviewed

    Chisaki Kuma, Kana Sato, Isao Matsui, Yorinobu Takigawa, Tokuteru Uesugi, Kenji Higashi

    Materials Letters   244   192 - 194   2019.06（ ISSN:0167-577X ）

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    Publishing type：Research paper (scientific journal)  

    © 2019 Elsevier B.V. Al and Al alloys electrodeposited from a dimethylsulfone (DMSO 2 ) bath are typically contaminated with S and Cl. Electrodeposited Al and Al alloys suffer from limited ductility since undesired impurities decrease plastic deformability. Herein, we report an electrodeposition process involving the use of a DMSO 2 bath that realizes an Al product with tensile elongation as large as ∼30%. Doping of tin chloride in the DMSO 2 bath resulted in a micrometer-scale grain microstructure with sub-µm Sn precipitates distributed along the grain boundaries of the electrodeposited Al. These Sn precipitates on the electrodeposits prevented S and Cl contamination, which is likely the main factor underlying the large tensile elongation in the electrodeposited Al. Furthermore, electrodeposition with varying concentrations of tin chloride pointed to that tin chloride showed enough impurities reducing ability even in trace amounts.

    DOI： 10.1016/j.matlet.2019.02.074

  • Suppression of the thermal embrittlement induced by sulfur segregation to grain boundary in Ni-based electrodeposits Reviewed

    I.Matsui,Y.Hisai,T.Uesugi,N.Omura,Y.Takigawa,K.Higashi

    Materialia 雑誌 ELSEVIER   6   2019.06

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    Kind of work：Joint Work  

  • Suppression of the thermal embrittlement induced by sulfur segregation to grain boundary in Ni-based electrodeposits Reviewed

    Isao Matsui, Yukihiro Hisai, Tokuteru Uesugi, Naoki Omura, Yorinobu Takigawa, Kenji Higashi

    Materialia   6   2019.06

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    Publishing type：Research paper (scientific journal)  

    © 2019 Acta Materialia Inc. Electrodeposited Ni and its alloys typically contain S due to crucial reagents used in the electrodeposition processes. The relative S concentration at the grain boundary (GB) increases when grain sizes are increased by thermal treatments, resulting in a transition from ductile to brittle failure. In this study, we theoretically explored effective solute elements for suppressing thermal embrittlement induced by S segregation to the GBs and experimentally verified the effect of a candidate solute. The GB segregation energies, interaction energy between S and solute, and embrittling potency energy were calculated from first-principles calculations for 57 Ni-based solid solutions. The results of these calculations are discussed based on the McLean and Rice–Wang models, which are used to identify effective elements to counteract the GB-decohesion by S segregation, such as B and W. For verification, electrodeposited Ni, Ni–B, and Ni–W alloys, containing the same S content, were prepared and their tensile behavior after annealing was examined. Although thermal embrittlement occurred in all electrodeposited samples, microstructure observation and fracture surface analysis indicated differences in grain size and S concentration at the GBs, resulting in embrittlement. These results revealed that W alloying in Ni-based electrodeposits has a high ability to suppress thermal embrittlement.

    DOI： 10.1016/j.mtla.2019.100312

  • Direct observation of strain-stored grains in electrodeposited nanocrystalline Ni-W alloys by low-angle annular dark field diffraction contrast imaging

    Isao Matsui, Yorinobu Takigawa, Takahisa Yamamoto

    Scripta Materialia   166   29 - 33   2019.06（ ISSN:1359-6462 ）

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    Publishing type：Research paper (scientific journal)  

    Nanostructures of grain interior in electrodeposited nanocrystalline Ni-W alloys were evaluated by low-angle annular dark-field scanning transmission electron microscopy (LAADF-STEM). LAADF imaging displayed sufficient contrast to sensitively reflect distortions of the crystal orientation. Conventional STEM images showed the nanocrystalline structures with grain size of ~30 nm. By combining these modalities, LAADF-STEM images captured variations in the crystal orientation within nanograins. In addition, Fourier transform-processed patterns revealed that the crystal lattice was already distorted even in the as-deposited state. The importance of strain-stored grains is discussed in terms of their potential mechanical properties.

    DOI： 10.1016/j.scriptamat.2019.03.001

  • Al-Cu-Mg合金とAl-Zn-Mg-Cu合金の粒界破壊に及ぼすZr添加の影響 Reviewed

    大手　里奈, 吉岡　浩司, 上杉　徳照, 瀧川　順庸, 東　健司

    軽金属 雑誌 軽金属学会   69 ( 4 )   235 - 241   2019.04

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    Kind of work：Joint Work  

  • Reduction of impurity contents in aluminum plates electrodeposited from a dimethylsulfone-aluminum chloride bath Reviewed

    Chisaki Kuma, Kana Sato, Yudai Hanaoka, Isao Matsui, Yorinobu Takigawa, Tokuteru Uesugi, Kenji Higashi

    Journal of Alloys and Compounds   783   919 - 926   2019.04（ ISSN:0925-8388 ）

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    Publishing type：Research paper (scientific journal)  

    © 2018 Elsevier B.V. High productivity and bath stability of electrodeposition for Al and its alloys from a dimethylsulfone (DMSO2)-aluminum chloride bath are highly desirable characteristics for a wide range of critical applications. However, a long-standing problem for such electrodeposits is S and Cl contamination, which results in limited ductility. In this study, we explored a reduction method for S and Cl in Al electrodeposits from a DMSO2 bath to facilitate plastic elongation of the electrodeposited Al. For 2–5:10 M ratios of aluminum chloride to DMSO2, tailoring the conditions of electrodeposition decreased the S and Cl contents to ∼0.2 at%. The addition of various metal salts revealed that gallium chloride further reduced the S and Cl contents to less than 0.1 at%. This reduction permitted the electrodeposited Al–Ga alloys to exhibit plastic elongation in tensile tests. Based on the results of experiments and first-principles calculations, we discuss the role of Ga in the growth mode of electrodeposits and its effect on grain boundary cohesion. Thus, we elucidate the mechanisms for realizing high strength and ductility in electrodeposited Al alloys.

    DOI： 10.1016/j.jallcom.2018.12.355

  • Artificial neural network assisted by first-principles calculations for predicting transformation temperatures in shape memory alloys Reviewed

    Daichi Minami, Tokuteru Uesugi, Yorinobu Takigawa, Kenji Higashi

    International Journal of Modern Physics B   33 ( 8 )   2019.03（ ISSN:0217-9792 ）

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    Publishing type：Research paper (scientific journal)  

    © 2019 World Scientific Publishing Company. A key property for the design of new shape memory alloys is their working temperature range that depends on their transformation temperature T 0 . In previous works, T 0 was predicted using a simple linear regression with respect to the energy difference between the parent and the martensitic phases, ΔE p-m . In this paper, we developed an accurate method to predict T 0 based on machine learning assisted by the first-principles calculations. First-principles calculations were performed on 15 shape memory alloys; then, we proposed an artificial neural network method that used not only computed ΔE p-m but also bulk moduli as input variables to predict T 0 . The prediction error of T 0 was improved to 49 K for the proposed artificial neural network compared with 188 K for simple linear regression.

    DOI： 10.1142/S0217979219500553

  • Thermal embrittlement and microstructure change in electrodeposited Ni

    Isao Matsui, Rina Ohte, Naoki Omura, Yorinobu Takigawa

    Materials Science and Engineering A   745   168 - 175   2019.02（ ISSN:0921-5093 ）

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    Publishing type：Research paper (scientific journal)  

    Thermal embrittlement due to sulfur (S) segregation to the grain boundaries (GBs) in electrodeposited Ni and Ni alloys have been previously reported. In this study, microstructural changes in electrodeposited Ni with 220 ppm S transitioning from ductile to brittle fracture were observed by electron backscatter diffraction (EBSD) to determine the types of microstructure that result in thermal embrittlement. Tensile tests of the electrodeposited Ni after annealing showed decreasing tensile elongation to zero with increasing annealing temperature or time. Auger analysis of the fracture surface indicated that thermal embrittlement was due to GB segregation of S. This behavior diverges from the average grain size and fraction of kernel average misorientation detected by EBSD analysis but can be explained by considering average size of the recrystallized grains with (111) orientation. Furthermore, the S concentration at the GBs estimated using the size of recrystallized grains agreed with the values obtained from the Auger analysis. Thus, the S-rich GBs that lead embrittlement, were formed primarily by recrystallization.

    DOI： 10.1016/j.msea.2018.12.098

  • Revealing the intrinsic ductility of electrodeposited nanocrystalline metals Reviewed

    Hiroki Mori, Isao Matsui, Yorinobu Takigawa, Tokuteru Uesugi, Kenji Higashi

    Materials Letters   235   224 - 227   2019.01（ ISSN:0167-577X ）

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    Publishing type：Research paper (scientific journal)  

    © 2018 Elsevier B.V. We electrodeposited bulk nanocrystalline Fe–Ni alloys with a tensile ductility of 12%–24%. We explored the intrinsic ductility of these alloys, taking into consideration the relationship between the ductility and the orientation index and contents of the grain boundary embrittlement element. Applying multiple regression analysis to our findings and those from the literature we found that the ductility of Fe–Ni alloys can be predicted from their orientation index for the (2 0 0) plane and sulfur content. The analysis of our study points to the potential for intrinsic ductility in nanocrystalline Fe–Ni alloys greater than that of the present highest value of 24%.

    DOI： 10.1016/j.matlet.2018.10.053

  • Increasing the W Content in Electrodeposited Bulk Nanocrystalline Ni-W Alloys with High Ductility Reviewed

    KODAMA Hayato, MORI Hiroki, MATSUI Isao, TAKIGAWA Yorinobu, UESUGI Tokuteru, HIGASHI Kenji

    Journal of The Surface Finishing Society of Japan   70 ( 1 )   50 - 52   2019（ ISSN:0915-1869 ）

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    <p>Conventionally, the W content of a ductile electrodeposited nanocrystalline Ni-W alloy was only up to 2%. In this study, we investigated the relationship between bath compositions and W content of the electrodeposit. The W content could be increased as high as 3.8% by adjusting the bath composition, while the tensile elongation was maintained greater than 10%.</p>

    DOI： 10.4139/sfj.70.50

    CiNii Article

  • Effects of Zr-addition on intergranular fracture of Al-Cu-Mg and Al-Zn-Mg-Cu alloys Reviewed

    Rina Ohte, Koji Yoshioka, Tokuteru Uesugi, Yorinobu Takigawa, Kenji Higashi

    Keikinzoku/Journal of Japan Institute of Light Metals   69 ( 4 )   235 - 241   2019（ ISSN:0451-5994 ）

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    Publishing type：Research paper (scientific journal)  

    © 2019 The Japan Institute of Light Metals Effects of Zr addition on the intergranular fracture of Al-Cu-Mg and Al-Zn-Mg-Cu alloys were investigated. The alloys were Al-4.6 mass%Cu-1.5 mass%Mg (0.17 mass%Zr) and Al-7.5 mass%Zn-2.9 mass%Mg-2.0 mass%Cu (0.2 mass% Zr). All alloys were synthesized using high-purity aluminum with more than 99.999 mass%. The grain size and hardness of each alloy were made consistent by annealing and further aging treatment, respectively. It was revealed that the Zr addition suppresses intergranular fracture and improves the ductility under the condition that the grain size and hardness are the same. These effects of Zr addition appeared near the transition region from transgranular fracture to intergranular fracture. The first-principles calculation results indicated that Zr is the only element which segregates to the grain boundary and strengthens the grain boundary among alloying elements of Zn, Mg, Cu, and Zr in aluminum.

    DOI： 10.2464/jilm.69.235

  • Effect of a small amount of Fe-addition on intergranular fracture of Al-7.3 mass%Mg alloys Reviewed

    Rina Ohte, Takahiro Yamada, Tokuteru Uesugi, Yorinobu Takigawa, Kenji Higashi

    Keikinzoku/Journal of Japan Institute of Light Metals   69 ( 9 )   457 - 464   2019（ ISSN:0451-5994 ）

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    Publishing type：Research paper (scientific journal)  

    © 2019 The Japan Institute of Light Metals. An Al-7.3 mass%Mg-based alloy with high strength and good hot rollability was developed by addition of grain boundary strengthening element. We predicted that Fe is the most effective element for grain boundary strengthening at 773 K from first-principles calculations. Then, an Al-7.3%Mg-62 ppmFe alloy and Al-7.3%Mg-124 ppmFe alloy were developed. Grain boundary analysis by HAADF-STEM revealed that added Fe segregated at grain boundaries in the Al-111 ppmFe alloy. The Al-7.3%Mg-62 ppmFe alloy and Al-7.3%Mg-124 ppmFe alloy exhibited good workability without crack by intergranular fracture, whereas an Al-7.3%Mg alloy exhibited poor workability with crack by intergranular fracture at 298-623 K. Also, the Al-7.3%Mg-124 ppmFe alloy showed the best workability, and when the Fe concentration was below the solid solubility limit, the workability improved as the amount of Fe added increased. We succeeded in developing a high strength Al-7.3%Mg-124 ppmFe alloy with good workability.

    DOI： 10.2464/jilm.69.457

  • Development of electrodeposition process based on chloride electrolytes for bulk pure Fe with plastic deformability Reviewed

    Yu Ogura, Mizuki Kanetake, Isao Matsui, Yorinobu Takigawa, Tokuteru Uesugi, Kenji Higashi

    Materials Transactions   60 ( 1 )   130 - 135   2019（ ISSN:1345-9678 ）

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    Publishing type：Research paper (scientific journal)  

    ©2018 The Japan Institute of Metals and Materials. Contamination with sulfur causes deterioration of the mechanical properties of electrodeposited nanocrystalline iron (Fe) and its alloys. However, it is difficult to avoid this contamination for electrodeposition from a sulfate bath. In this study, we explored the processing parameters required to produce thick plates of electrodeposited Fe from a chloride bath containing no sulfur and examined the resulting mechanical properties. In a simple bath consisting only of iron chloride, the long electrodeposition required to produce bulk samples could not be performed due to the precipitation of hydroxide, which caused the voltage to increase beyond the limits of the equipment. The addition of ammonium chloride inhibited the generation of hydroxide and stabilized the voltage during the electrodeposition. In addition, a higher bath temperature suppressed the formation of micro-cracks on the surface of the electrodeposits. Furthermore, the appearance of voids on the surface was reduced by increasing the concentration of the iron source and decreasing the current density. On the basis of these results, we prepared a bulk sample of electrodeposited Fe with a body-centered cubic structure and average grain size of 3 5 µm. The electrodeposited bulk Fe exhibited a tensile strength of 649MPa and good elongation of 13.9%.

    DOI： 10.2320/matertrans.M2018214

  • Revealing the intrinsic ductility of electrodeposited nanocrystalline metals Reviewed

    H. Mori, I. Matsui, Y. Takigawa, T. Uesugi, K. Higashi

    Materials Letters ELSEVIER   235   224 - 227   2018.10

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    Kind of work：Joint Work  

  • Improvement of High Temperature Strength by Addition of Vanadium Content of Ni–Cr–Mo Steel for Brake Discs Reviewed

    N. Harada, T. Uesugi, Y. Takigawa and K. Higashi

    ISIJ International 雑誌 日本鉄鋼協会   57   550 - 557   2017.03

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    Kind of work：Joint Work  

  • Effect of Transition Metals on Enthalpy Change in Alpha and Beta Ti Alloys from First-Principles Calculations Reviewed

    T. Uesugi, S. Miyamae, Y. Takigawa and K. Higashi

    Proceedings of the 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM9) 雑誌 PRICM9   91 - 92   2016.08

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    Kind of work：Joint Work  

  • Effect of Period 4 Elements on Work Function in Aluminum from First-Principles Calculations Reviewed

    T. Higuchi, T. Uesugi, H. Inoue, Y. Takigawa and K. Higashi

    Proceedings of the 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM9) 雑誌 PRICM9   621 - 623   2016.08

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    Kind of work：Joint Work  

  • Effects of Third Elements on Shape Memory Properties of Ti-Nb-X Ternary Alloys from First-Principles Calculations Reviewed

    D. Minami, T. Uesugi, Y. Takigawa and K. Higashi

    Proceedings of the 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM9) 雑誌 PRICM9   878 - 881   2016.08

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    Kind of work：Joint Work  

  • Grain Boundary Energy of Σ13 [0001] Twist Grain Boundary in MgB2 from First-Principles Calculations Reviewed

    Y. Hisai, T. Uesugi, Y. Takigawa and K. Higashi

    Proceedings of the 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM9) 雑誌 PRICM9   914 - 916   2016.08

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    Kind of work：Joint Work  

  • Reduction in sulfur content of electrodeposited bulk nanocrystalline Fe–Ni alloys using manganese chloride Reviewed

    H. Mori, I. Matsui, Y. Takigawa, T. Uesugi and K. Higashi

    Materials Letters 雑誌 ELSEVIER   175   86 - 88   2016.07

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    Kind of work：Joint Work  

  • Mg-6%Al-1%Zn-2%Ca合金のMIG溶接 Reviewed

    瀧川順庸, 味原颯大, 松下遼, 上田光二, 木ノ本裕, 上杉徳照, 東健司

    軽金属 雑誌 軽金属学会   66   252 - 257   2016.06

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    Kind of work：Joint Work  

  • Alloying Effects of Transition Metals on Beta Phase Stability of Ti Alloys from First-Principles Calculations Reviewed

    T. Uesugi, S. Miyamae, Y. Takigawa and K. Higashi

    Proceedings of the 13th World Conference on Titanium 雑誌 TMS   1919 - 1923   2016.05

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    Kind of work：Joint Work  

  • Calculation of alloying effect on formation enthalpy of TiCu intermetallics from first-principles calculations for designing Ti–Cu-system metallic glasses Reviewed

    N. Shirasawa, Y. Takigawa, T. Uesugi and K. Higashi

    Philosophical Magazine Letters 雑誌 Taylor & Francis Ltd.   96   27 - 34   2016.01

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    Kind of work：Joint Work  

  • Effect of Alloying Element X on Transformation Strains and Phase Stabilities between αʹʹ and β Ti-Nb-X (X = Al, Sn, Zr, Ta) Ternary Alloys from First-Principles Calculations Reviewed

    D. Minami, T. Uesugi, Y. Takigawa and K. Higashi

    Materials Transactions 雑誌 The Japan Institute of Metals   57   263 - 268   2016

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    Kind of work：Joint Work  

  • Effects of Solute Fe, Zn, and Mg on Recrystallization in Aluminum Reviewed

    K. Wada, K. Takeshima, T. Uesugi, Y. Takigawa and K. Higashi

    Materials Transactions 雑誌 The Japan Institute of Metals   57   329 - 334   2016

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    Kind of work：Joint Work  

  • Improvement in plastic elongation at room temperature of electrodeposited bulk nanocrystalline Fe–Ni alloys by reducing sulfur content Reviewed

    H. Mori, I. Matsui, Y. Takigawa, T. Uesugi and K. Higashi

    Proceedings of Processing and Fabrication of Advanced Materials (PFAM) XXIV 雑誌 PFAM   757 - 762   2015.12

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    Kind of work：Joint Work  

  • Effect of transition elements on specific electrical resistance in Aluminum from first-principles calculations Reviewed

    T. Higuchi, T. Uesugi, Y. Takigawa and K. Higashi

    Proceedings of Processing and Fabrication of Advanced Materials (PFAM) XXIV 雑誌 PFAM   561 - 567   2015.12

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    Kind of work：Joint Work  

  • Effects of transition metals on elastic moduli of binary β-Ti alloys from first-principles calculations Reviewed

    A. Koyano, T. Uesugi, Y. Takigawa and K. Higashi

    Proceedings of Processing and Fabrication of Advanced Materials (PFAM) XXIV 雑誌 PFAM   568 - 576   2015.12

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    Kind of work：Joint Work  

  • Effects of third elements on shape memory properties of Ti-Nb-X and Ti-Mo-X ternary alloys from first-principles calculations Reviewed

    D. Minami, T. Uesugi, Y. Takigawa and K. Higashi

    Proceedings of Processing and Fabrication of Advanced Materials (PFAM) XXIV 雑誌 PFAM   577 - 581   2015.12

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    Kind of work：Joint Work  

  • Study of solute atoms and precipitates affecting recrystallization temperature in high purity Al-Fe alloy Reviewed

    K. Wada, K. Takeshima, T. Uesugi, Y. Takigawa and K. Higashi

    Proceedings of Processing and Fabrication of Advanced Materials (PFAM) XXIV 雑誌 PFAM   686 - 692   2015.12

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    Kind of work：Joint Work  

  • Reduction of embrittlement elements in electrodeposited Al by alloying Reviewed

    C. Kuma, Y. Hanaoka, Y. Takigawa, T. Uesugi and K. Higashi

    Proceedings of Processing and Fabrication of Advanced Materials (PFAM) XXIV 雑誌 PFAM   745 - 748   2015.12

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    Kind of work：Joint Work  

  • Fabrication of new Ti-Zr-Cu-Ga bulk metallic glasses Reviewed

    Y. Ohashi, N. Shirasawa, Y. Takigawa, T. Uesugi and K. Higashi

    Proceedings of Processing and Fabrication of Advanced Materials (PFAM) XXIV 雑誌 PFAM   749 - 752   2015.12

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    Kind of work：Joint Work  

  • Elevating W content of high ductility electrodeposited bulk nanocrystalline Ni–W alloys Reviewed

    H. Kodama, H. Mori, Y. Takigawa, T. Uesugi and K. Higashi

    Proceedings of Processing and Fabrication of Advanced Materials (PFAM) XXIV 雑誌 PFAM   753 - 756   2015.12

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    Kind of work：Joint Work  

  • Mechanical Behavior of Electrodeposited Bulk Nanocrystalline Fe-Ni Alloys Reviewed

    I. Matsui, H. Mori, T. Kawakatsu, Y. Takigawa, T. Uesugi and K. Higashi

    Materials Research 雑誌 ELSEVIER   18   95 - 100   2015.11

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    Kind of work：Joint Work  

  • Significance of Si impurities on exceptional room-temperature superplasticity in a high-purity Zn-22%Al alloy Reviewed

    T. Uesugi, M. Kawasaki, M. Ninomiya, Y. Kamiya, Y. Takigawa and K. Higashi

    Materials Science and Engineering A 雑誌 ELSEVIER   645   47 - 56   2015.10

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    Kind of work：Joint Work  

  • Texture Change during Superplastic Deformation in Fine-Grained Magnesium Alloys Reviewed

    H. Watanabe, T. Uesugi, Y. Takigawa and K. Higashi

    Materials Science Forum 雑誌 Trans Tech Publications Ltd.   838-839   59 - 65   2015.09

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    Kind of work：Joint Work  

  • Effect of Solute Elements on Grain Refinement during Friction Stir Processing in High-Purity Aluminum Reviewed

    T. Uesugi, H. Iwami, Y. Takigawa and K. Higashi

    Materials Science Forum 雑誌 Trans Tech Publications Ltd.   838-839   116 - 121   2015.09

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    Kind of work：Joint Work  

  • 第5章　マグネシウム合金の耐食・耐摩耗性の向上と成形技術　第4節　マグネシウム合金の組織制御と高延性化技術 Reviewed

    東健司, 瀧川順庸, 上杉徳照

    自動車軽量化のための材料開発と強度、剛性、強靭性の向上技術 雑誌 技術情報協会   445 - 450   2015.06

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    Kind of work：Joint Work  

  • Achieving room-temperature superplasticity in an ultrafine-grained Zn-22% Al alloy Reviewed

    T. Uesugi, Y. Takigawa, M. Kawasaki and K. Higashi

    Letters on materials 雑誌 ELSEVIER   5   269 - 275   2015.02

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    Kind of work：Joint Work  

  • The evaluation parameters for glass-forming ability in Ti–Cu system metallic glasses Reviewed

    N. Shirasawa, Y. Takigawa, T. Uesugi and K. Higashi

    Materials Letters 雑誌 ELSEVIER   139   73 - 76   2015

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    Kind of work：Joint Work  

  • Strategy for Electrodeposition of Highly Ductile Bulk Nanocrystalline Metals with a Face-Centered Cubic Structure Reviewed

    I. Matsui, Y. Takigawa, D. Yokoe, T. Kato, T. Uesugi, and K. Higashi

    Materials Transactions 雑誌 The Japan Institute of Metals   55   1859 - 1866   2014.12

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    Kind of work：Joint Work  

  • Prediction and fabrication of Ti-Zr-Co ternary metallic glasses based on effective　atomic radius in Ti solid solution from first-principles calculations Reviewed

    N. Shirasawa, R. Ito, Y. Takigawa, T. Uesugi and K. Higashi

    Journal of Non-Crystalline Solids 雑誌 ELSEVIER   400   67 - 71   2014.09

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    Kind of work：Joint Work  

  • Enhancement in mechanical properties of bulk nanocrystalline Fe-Ni alloys electrodeposited using propionic acid Reviewed

    I. Matsui, H. Mori, T. Kawakatsu, Y. Takigawa, T. Uesugi and K. Higashi

    Materials Science and Engineering A 雑誌 ELSEVIER   607   505 - 510   2014.06

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    Kind of work：Joint Work  

  • Influence of impurities on mechanical properties of electrodeposited bulk nanocrystalline Al Reviewed

    S. Ono, Y. Hanaoka, I. Matsui, Y. Takigawa, T. Uesugi and K. Higashi

    Advanced Materials Research 雑誌 Trans Tech Publications Ltd.   922   574 - 579   2014.05

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    Kind of work：Joint Work  

  • Relationship between strength and grain size of friction stir processed and annealed high purity aluminum Reviewed

    S. Kobayashi, T. Kawakatsu, Y. Takigawa, T. Uesugi and K. Higashi

    Advanced Materials Research 雑誌 Trans Tech Publications Ltd.   922   372 - 375   2014.05

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    Kind of work：Joint Work  

  • Preparatory electrodeposition process for high purity bulk aluminum Reviewed

    Y. Hanaoka, S. Ono, I. Matsui, Y. Takigawa, T. Uesugi and K. Higashi

    Advanced Materials Research 雑誌 Trans Tech Publications Ltd.   922   237 - 241   2014.05

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    Kind of work：Joint Work  

  • Influence of filler rod composition on the strength of tungsten inert gas welded magnesium alloy joint Reviewed

    S. Shimomura, T. Minomo, Y. Takigawa, T. Uesugi, M. Ueda, Y. Kinomoto and K. Higashi

    Advanced Materials Research 雑誌 Trans Tech Publications Ltd.   922   663 - 666   2014.05

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    Kind of work：Joint Work  

  • Effect of small addition of Si on superplastic elongation at room temperature in Zn--Al eutectoid superplastic alloy Reviewed

    Y. Kamiya, M. Ninomiya, T. Uesugi, Y. Takigawa and K. Higashi

    Advanced Materials Research 雑誌 Trans Tech Publications Ltd.   922   328 - 331   2014.05

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    Kind of work：Joint Work  

  • Design and fabrication of new Ti--based ternary metallic glasses based on effective atomic　radius in the Ti solid solution calculated by ab--initio calculation Reviewed

    N. Shirasawa, R. Ito, Y. Takigawa, T. Uesugi and K. Higashi

    Advanced Materials Research 雑誌 Trans Tech Publications Ltd.   922   671 - 675   2014.05

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    Kind of work：Joint Work  

  • Dislocation creep in Al-22.2, 53.6 and 101 at.ppm Fe solid solution alloys Reviewed

    K. Takeshima, T. Uesugi, Y. Takigawa and K. Higashi

    Advanced Materials Research 雑誌 Trans Tech Publications Ltd.   922   749 - 754   2014.05

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    Kind of work：Joint Work  

  • Contribution of interstitial solute strengthening in aluminum Reviewed

    I. Matsui, S. Ono, Y. Hanaoka, T. Uesugi, Y. Takigawa and K. Higashi

    Philosophical Magazine Letters 雑誌 Taylor & Francis Ltd.   94   63 - 71   2014.02

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    Kind of work：Joint Work  

  • Fabrication of bulk nanocrystalline Fe–Ni alloys with high strength and high ductility by an electrodeposition Reviewed

    I. Matsui, T. Kawakatsu, Y. Takigawa, T. Uesugi and K. Higashi

    Materials Letters 雑誌 ELSEVIER   116   71 - 74   2014.02

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    Kind of work：Joint Work  

  • High tensile ductility in electrodeposited bulk nanocrystalline Ni--W alloys Reviewed

    I. Matsui, Y. Takigawa and K. Higashi

    Advanced Materials Research 雑誌 Trans Tech Publications Ltd.   922   497 - 502   2014

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    Kind of work：Joint Work  

  • Development of new high-strength and heat-resistant Mg-Zn-Y-X (X = Zr and Ag) casting alloys Reviewed

    Y. Ienaga, K. Inoue, T. Uesugi, Y. Takigawa and K. Higashi

    Materials Science Forum 雑誌 Trans Tech Publications Ltd.   783-786   384 - 389   2014

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    Kind of work：Joint Work  

  • Development of highly efficient saving processes of rare earth in R-T-B permanent magnet. Reviewed

    A. Saguchi, T. Uesugi, Y. Takigawa, and K.Higashi

    Physics Procedia 雑誌 ELSEVIER   54   168 - 173   2014

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    Kind of work：Joint Work  

  • Enhanced tensile ductility in bulk nanocrystalline nickel electrodeposited by sulfamate bath

    I. Matsui, Y. Takigawa, T. Uesugi and K. Higashi

    Materials Letters 雑誌 Elsevier   65 ( 15-16 )   2351 - 2353   2011.08

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    Kind of work：Joint Work  

  • Cavitation during grain-boundary-sliding deformation in an AZ61 magnesium alloy Reviewed

    Y. Takigawa, J.V. Aguirre, E. M. Taleff and K. Higashi

    Mater. Sci. Eng. A 雑誌 Elsevier Science SA   497 ( 41641 )   139 - 146   2008.12

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    Kind of work：Joint Work  

  • Nanoscale amorphous "band-like" structure induced by friction stir processing in Zr55Cu30Al10Ni5 bulk metallic glass Reviewed

    J. Kobata, Y. Takigawa, S.W. Chung, H. Tsuda, H. Kimura and K. Higashi

    Mater. Lett. 雑誌 Elsevier Science BV   61 ( 17 )   3771 - 3773   2007.07

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    Kind of work：Joint Work  

▼display all

Books and Other Publications

  • 自動車軽量化のための材料開発と強度、剛性、強靭性の向上技術

    村田貴士　他（ Role： Joint author）

    技術情報協会  2015.06 

  • シナジーセラミックス

    　（ Role： Joint author）

    技報堂出版  2000.03  （ ISBN:ISBN4-7655-0131-0 ）

MISC

  • Improving the reliability of flame-retardant magnesium alloy MIG welds

    瀧川順庸, 上田光二, 木ノ本裕, 上杉徳照, 東健司

    軽金属学会大会講演概要   140th   2021（ ISSN:1882-6083 ）

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Presentations

  • 難燃性マグネシウム合金MIG溶接体の機械的特性向上における溶加材組成の影響 Domestic conference

    KIM KYUNGSU，木ノ本裕，瀧川順庸

    軽金属学会関西支部若手研究者・院生による研究発表会  2024.03 

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    Presentation type：Oral presentation (general)  

    Venue：姫路  

  • 摩擦攪拌プロセスを用いたマグネシウム合金の水素吸蔵特性向上 Domestic conference

    和手優弥，木元慶久，瀧川順庸

    軽金属学会関西支部若手研究者・院生による研究発表会  2024.03 

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    Presentation type：Poster presentation  

    Venue：姫路  

  • 難燃性マグネシウム合金MIG溶接体の継手強度特性最適化 Invited Domestic conference

    瀧川順庸

    軽金属学会第130回シンポジウム　｢軽量車両構体の信頼性を高めるための材料評価技術～難燃性マグネシウム合金を事例として～｣  2024.01 

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    Presentation type：Oral presentation (invited, special)  

    Venue：東京  

  • 短下肢装具ソール材のための可撓性を有するCFRPの疲労特性向上 Domestic conference

    本田このみ，鈴木淳也，齋藤聡佳，米津亮，瀧川順庸

    日本材料学会関西支部　第18回若手シンポジウム  2023.12 

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    Presentation type：Poster presentation  

  • Grain growth bihavior in electrodeposited nanocrystalline FeCoNi medium-entropy alloy International conference

    Atsuya Watanabe, Takahisa Yamamoto, Koichiro Nambu, Yorinobu Takigawa

    The International Federation for Heat Treatment and Surface Engineering  2023.11 

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    Presentation type：Oral presentation (general)  

    Venue：Yokohama  

  • 難燃性マグネシウム合金MIG溶接体の機械的特性に及ぼす溶加材組成の影響 Domestic conference

    KIM KYUNGSU，木ノ本裕，瀧川順庸

    軽金属溶接協会　研究成果発表会  2023.11 

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    Presentation type：Oral presentation (general)  

    Venue：オンライン  

  • 深共晶溶媒を用いて作製した電析Niの機械的特性 Domestic conference

    片倉遥香，山本朝陽，瀧川順庸

    第25回関西表面技術フォーラム  2023.11 

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    Presentation type：Poster presentation  

    Venue：神戸  

  • 生分解性インプラントに応用可能な電着Zn-Fe合金の作製 Domestic conference

    宮本了輔，荒内隆誓，湖東弘樹，瀧川順庸

    第25回関西表面技術フォーラム  2023.11 

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    Presentation type：Poster presentation  

    Venue：神戸  

  • 電解析出法による高強度・高延性ナノ結晶合金の作製と生体材料への応用 Domestic conference

    瀧川順庸

    日本材料学会 第 71回生体・医療材料部門委員会  2023.11 

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    Presentation type：Oral presentation (invited, special)  

    Venue：大阪  

  • 短下肢装具ソール材のための可撓性を有するＣＦＲＰの疲労特性 Domestic conference

    本田このみ，鈴木淳也，齋藤聡佳，米津亮，瀧川順庸

    日本材料学会　第9回材料ＷＥＥＫ若手学生研究発表会  2023.10 

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    Presentation type：Poster presentation  

    Venue：京都  

  • 深共晶溶媒を用いた微細結晶粒を有する電析Ｚｎの作製 Domestic conference

    高見晃輔，片倉遥香，瀧川順庸

    日本材料学会　第9回材料ＷＥＥＫ若手学生研究発表会  2023.10 

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    Presentation type：Poster presentation  

    Venue：京都  

  • 電解析出法による機械的特性に優れた亜鉛の作製 Domestic conference

    宮本了輔，湖東弘樹，瀧川順庸

    表面技術協会　第148回講演大会  2023.09 

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    Presentation type：Oral presentation (general)  

    Venue：米沢  

  • 深共晶溶媒を用いた高強度高延性電析Niの作製 Domestic conference

    片倉遥香，山本朝陽，瀧川順庸

    表面技術協会　第148回講演大会  2023.09 

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    Presentation type：Oral presentation (general)  

    Venue：米沢  

  • 深共晶溶媒を用いた塑性変形能を有する電析Niの作製 Domestic conference

    片倉遥香，山本朝陽，瀧川順庸

    日本金属学会 秋期　第回講演大会  2023.09 

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    Presentation type：Poster presentation  

    Venue：富山  

  • 生分解性インプラントへの応用に向けた電着Zn-Feの合金の作製 Domestic conference

    宮本了輔，荒内隆誓，湖東弘樹，瀧川順庸

    日本金属学会 秋期講演大会  2023.09 

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    Presentation type：Poster presentation  

    Venue：富山  

  • 超塑性を示す電析Niを中間材に用いた鉄鋼材料の低温接合 Domestic conference

    三島陸，片倉遥香，兼山凱，瀧川順庸

    日本金属学会 秋期講演大会  2023.09 

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    Presentation type：Poster presentation  

    Venue：富山  

  • めっき法によるバルクナノ結晶FeCoNiミディアムエントロピー合金の創製 Domestic conference

    渡邉充哉, 山本剛久, 瀧川順庸

    日本機械学会 材料加工技術講演会（M&P 2023）  2023.09 

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    Presentation type：Oral presentation (general)  

    Venue：つくば  

  • 生分解性インプラント応用に向けた電着Zn-Feの合金の作製 Domestic conference

    宮本了輔，荒内隆誓，湖東弘樹，瀧川順庸

    日本バイオマテリアル学会第18回関西ブロック若手研究発表会  2023.07 

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    Venue：大阪  

  • 電解析出法による強度・延性バランスと機能性に優れた金属材料の創製 Invited Domestic conference

    瀧川順庸

    関西表面技術シンポジウム  2023.07 

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    Presentation type：Oral presentation (invited, special)  

    Venue：大阪  

  • 蹴り出し追従型ソールにおける歩行時の足底内での荷重量推移

    米津 亮, 鈴木 淳也, 齋藤 聡佳, 瀧川 順庸, 平田 一郎, 香川 豊, 淵岡 聡, 清水 順市

    日本義肢装具学会誌  2022.09  (一社)日本義肢装具学会

  • 足底部を改良した油圧調整式短下肢装具による脳卒中片麻痺者の蹴り出しの変化

    古屋 美紀, 米津 亮, 鈴木 淳也, 斎藤 聡佳, 宮谷 定行, 藤本 康浩, 神尾 昭宏, 藤田 暢一, 瀧川 順庸, 淵岡 聡, 清水 順市

    日本義肢装具学会誌  2021.09  (一社)日本義肢装具学会

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Outline of collaborative research (seeds)

  • マグネシウム合金に関する研究

  • 材料の機械的特性に関する研究

  • 電解析出法によるバルクナノ結晶材料創製

Contract research

  • 柔らかく復元性の富んだ新複合材および成形技術開発による歩行障がい者の機能を促す下肢装置の実現

    中小企業庁  成長型中小企業等研究開発支援事業（Go-Tech事業）  2023

Charge of on-campus class subject

  • Materials and Industrial Engineering

    2021    

  • Materials Science and Engineering Laboratory III

    2021   Practical Training  

  • Materials Science and Engineering Laboratory II

    2021   Practical Training  

  • Introduction to Materials, Chemistry and Chemical Engineering

    2021    

  • Selected Topics in Materials Strength

    2021    

  • Society, Industry and Materials

    2021    

  • Advanced Strength of Materials

    2021    

  • Materials Design and Controlling Processes

    2021    

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Job title

  • Job title within the department

    School of Engineering Department of Materials Science 

    学科長  2024.04