研究者詳細 - 山口　富子

論文 - 山口　富子

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Evaluation of physical properties on functionally graded piping joints made from copper and austenitic stainless steel powder by HIP 査読有り

Nakano K., Anzai T., Yamaguchi T., Nishio K.

Proc. of the Int. Conf. on Advances in Welding Science and Technology for Construction, Energy and Transportation, AWST 2010, held in Conj. with the 63rd Annual Assembly of IIW 2010 165 - 170 2010年12月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Welding materials, that the principal chemical component is nickel, are used usually for the welding between copper and austenitic stainless steels. But many kinds of mechanical or physical properties of welds between two materials will change largely. In this study, Functionally Graded Piping Joints (FGPJ) have been manufactured as an experiment using copper and austenitic stainless steel (SUS304) powder by a process based on HIP. This composition has been confirmed by absorbed electron and characteristics X-ray images of each mixed layer for FGPJ to be uniform or continuous. The following items have been investigated and compared with the linear law of mixture rule: Vickers hardness, thermal expansion, and thermal conductivity at a one-dimensional non-steady state etc. Those physical properties have been identified to depend on the mixing ratios of copper and austenitic stainless steel (SUS304). Pretty good agreements have been obtained between the experimental data and the calculated values according to the linear law of mixture rule.

Scopus

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YAGレーザビーム照射による金属組織の微細化

西尾一政,山口富子

プラントエンジニア ( 未設定 ) 42 ( 12 ) 2 - 7 2010年12月

チタンのティグ溶接におけるシールドガスの挙動解析査読有り

和田洋二,井上智博,塚本　寛,山口富子,西尾一政

溶接学会論文集 28 ( 4 ) 383 - 390 2010年11月

アルミニウムと銅のスタッド溶接

石本大地, 謝〓, 山口富子, 西尾一政, 平本翔

溶接学会全国大会講演概要 87 104 - 105 2010年08月

YAGレーザ加熱による銅の結晶粒微細化に関する検討査読有り

山口富子,堀江慎一郎,西尾　一政

銅と銅合金 49 ( 1 ) 11 - 14 2010年08月

Evaluation of physical properties on Functionally Graded Piping Joints made from Cu and austenitic stainless steel powder 査読有り

KOICHI Nakano,TOSHIO Anzai,YAMAGUCHI Tomiko,NISHIO Kazumasa

MULTISCALE, MULTIFUNCTIONAL AND FUNCTIONALLY GRADED MATERIALS 631 273 - 278 2010年07月

鉄の物語日本におけるレールから見た鉄道の歴史

山口富子, 西尾一政,桝本弘毅

溶接技術 ( 産報出版 ) 58 ( 5 ) 103 - 106 2010年05月

Computational Fluid Dynamics Analysis of Shielding Gas Behavior in Tungsten Inert Gas Welding of Titanium Plate 査読有り

Yoji WADA,Satohiro INOUE,Hiroshi TSUKAMOTO,Tomiko YAMAGUCHI,Kazumasa NISHIO

IIW 2010年04月

CFDによるチタンのティク゛溶接におけるシールト゛カ゛ス挙動のシミュレーション

和田洋二, 井上智博, 塚本寛, 宮崎康次, 山口富子, 西尾一政

溶接学会全国大会講演概要 ( 一般社団法人溶接学会 ) 2010 ( 0 ) 192 - 192 2010年01月

記述言語：日本語掲載種別：研究論文（その他学術会議資料等）

著者らは，既報でCFDを使ったトレーラ・シールト゛ホ゛ックス内のアルコ゛ン流れの調査結果を報告した。本報告では，ティク゛溶接トーチ・カ゛ス流れの影響を考慮したシミュレーション・モテ゛ルを考案し，アルコ゛ン流れを解析した。この結果，溶接トーチ・カ゛スからのアルコ゛ン流れがトーチとホ゛ックスの接続部付近のアルコ゛ン雰囲気に影響を与えていることが分かった。つまり，アルコ゛ン雰囲気全体を乱すものではないが，その部分で少し大気が混入し，アルコ゛ンが希薄な空間が存在することを確認した。

DOI： 10.14920/jwstaikai.2010f.0.192.0

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/130004642027

高クロム鋳鉄のアブレージョン抵抗に及ぼす溶着金属組織と後熱処理の影響

本田嗣男, 黒木博憲, 山口富子, 西尾一政

鋳造工学全国講演大会講演概要集 ( 公益社団法人日本鋳造工学会 ) 157 ( 0 ) 75 - 75 2010年01月

アルミニウムと銅のスポット溶接について

謝イ, 平本翔, 山口富子, 西尾一政, 石本大地

溶接学会全国大会講演概要 ( 一般社団法人溶接学会 ) 2010 ( 0 ) 51 - 51 2010年01月

記述言語：日本語掲載種別：研究論文（学術雑誌）

工業用純アルミニウム板に銅製のスタッドボルトを溶接し、その溶接性について調査した。溶接にはCDスタッド溶接機を用いて、コンデンサー容量及び充電電圧の溶接条件を変化させてスタッド溶接を行い、溶接部のミクロ組織観察、元素分析及び引張試験を行った。また、引張破断面のSEM観察およびX線回折を行い、接合部界面における金属間化合物の形成の有無についても調査した。

DOI： 10.14920/jwstaikai.2010f.0.51.0

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/130004642069

アブレーシブウォータージェット切断を利用した過共晶高クロム鋳鉄溶接肉盛製篩分器の開発

本田嗣男, 黒木博憲, 山口富子, 西尾一政

鋳造工学全国講演大会講演概要集 ( 公益社団法人日本鋳造工学会 ) 156 ( 0 ) 109 - 109 2010年01月

Grain refinement of austenitic stainless steel by laser irradiation 査読有り

Yamaguchi T., Imamura N., Katoh M., Nishio K.

Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society ( 一般社団法人溶接学会 ) 27 ( 4 ) 270 - 277 2009年12月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

In structural materials, it is investigated to make crystal grain size less than 1μm in order to improve strength and toughness. Authors reported that fine ferrites were obtained by laser irradiation in steel. However, it is not made clear that an effect of laser irradiation on the materials which do not have a transformation. In this study, we performed laser irradiation for austenite stainless steel SUS304 as the materials which did not have a transformation and investigated an effect of laser irradiation on grain refinement. Solution treatments were performed for SUS304 and their initial grain size became 23 and 68μm. Then they were given four kinds of strain ε and irradiated laser under some laser traveling speeds v and some defocus distances fd. As the result, they became recrystallization grain and their size were obtained about 10 and 15 μm, for initial grain size respectively, under the best condition (laser power=1.5kW, fd=60mm, v=350 mm/min, ε= 40%). Then a recrystallization grain size was caused by each factor of laser traveling speed (heating temperature, heating time), strain and defocus distance. Furthermore, as an electro-gas arc weld of SUS304, the grain size was 40μm in heat affected zone, was irradiated after shot peening, it was clarified that fine grain was obtained from 10 to 15μm at the heat affected zone.

DOI： 10.2207/qjjws.27.270

Scopus

CiNii Article

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=75149143862&origin=inward

Monte Carlo simulation of grain refinement of ultra low carbon steel by cyclic laser irradiation 査読有り

Zhao F., Yamaguchi T., Ikeda H., Katoh M., Kazumasa N.

Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society ( 一般社団法人溶接学会 ) 27 ( 1 ) 89 - 95 2009年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

The refinement of ferrite grain of ultra low carbon steel was observed in cyclic laser irradiation. The high heating and cooling rates were considered to cause the promoted nucleation and the suppressed grain growth. The process of refinement of grain during the laser irradiation was investigated by Monte Carlo simulation. In order to obtain the accurate simulation, the apparent activation energy of austenite grain growth was measured by isothermal heating experiments and used in the simulation of austenite grain growth. The results of the austenite grain growth simulations had a good agreement with the experimental results. Consequently, α ⇆ γ phase transformations which involved temporal and spatial heterogeneous nucleation were modeled with Monte Carlo method in order to simulate the process of the cyclic laser irradiation. The phase transformed fraction of ferrite and austenite with high heating and cooling rates were also obtained by simulation, and the curves of transformed fraction of ferrite and austenite showed sigmoidal variations with temperature. The results of the simulations showed the decrease of ferrite and austenite grain size with increase of times of the cyclic laser irradiation, which could explain the refinement of ferrite grain by the cyclic laser irradiation.

DOI： 10.2207/qjjws.27.89

Scopus

CiNii Article

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純アルミニウム/銅クラッド材接合部の強度と高分解能TEM組織査読有り

山口富子,謝イ,恵良秀則,西尾一政

軽金属 59 ( 10 ) 542 - 547 2009年10月

レーザ照射によるオーステナイト系ステンレス鋼の結晶粒微細化査読有り

山口富子,今村直秀,加藤光昭,西尾一政

溶接学会論文集 27 ( 4 ) 270 - 277 2009年10月

急速加熱・急速冷却による金属組織の微細化

西尾一政,山口富子

ボイラ研究 ( 未設定 ) 357 ( 10 ) 20 - 24 2009年10月

レーザ溶融によるチタンの耐摩耗性改善

山口富子, 恵良秀則, 西尾一政

チタン ( (社）日本チタン協会 ) 57 ( 4 ) 295 - 299 2009年10月

Strength and HRTEM microstructure at bond interface of aluminum/copper clad materials 査読有り

Yamaguchi T., Xie W., Era H., Nishio K.

Keikinzoku/Journal of Japan Institute of Light Metals ( 一般社団法人軽金属学会 ) 59 ( 10 ) 542 - 547 2009年10月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

It is known that it is difficult to bond dissimilar metals such as aluminum and copper or aluminum and iron using diffusion bonding, because an intermetallic compound is easily produced at the bond interface and bonding strength becomes low. However it is possible to bond the dissimilar metals using the vacuum roll bonding which performs hot rolling in a vacuum. In this study, we investigated the effect of bonding temperature and reduction of aluminum plate thickness on bonding strength of Al/Cu clad materials when aluminum-clad copper (Al/Cu clad) materials were produced at 3 Pa in vacuum degree by the vacuum roll bondings. Bond tensile strength of Al/Cu clad materials increased as the reduction was increased. Their fracture types were classified according to the fracture pass, that is, in the base metal of the aluminum, at the bond interface of Al/Cu clad material or in the base metal and/or at the bond interface. Furthermore, the bond interfaces of Al/Cu clad materials were observed using a transmission electron microscope and an electron dispersive spectroscopy. As a result, it was clarified that Al/Cu clad materials are soundly produced using the vacuum roll bonding when thickness of diffusion layer is less than 60 nm even if intermetallic compounds were developed.

DOI： 10.2464/jilm.59.542

Scopus

CiNii Article

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=73149120441&origin=inward

軽金属材料の表面改質と複合材料開発

西尾一政,山口富子

軽金属 ( 軽金属 ) 59 ( 7 ) 392 - 393 2009年07月

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