Faculty Profiles - YAMAGUCHI Tomiko

Papers - YAMAGUCHI Tomiko

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Development of Cast-iron/Steel Composite by Fusion Welding Reviewed

HONDA Tsuguo, KUROKI Hironori, YAMAGUCHI Tomiko, NISHIO Kazumasa

29 ( 1 ) 29 - 34 2011.12

Welding metallurgy of steels

80 ( 5 ) 54 - 57 2011.12

Surface nitriding and improvement of wear resistance of titanium using laser irradiation Reviewed

75 ( 12 ) 697 - 704 2011.12

Surface Nitriding and Improvement of Wear Resistance of Titanium Using Laser Irradiation Reviewed

YAMAGUCHI Tomiko, YONESHO Yutaka, NISHIO Kazumasa

Journal of the Japan Institute of Metals and Materials ( The Japan Institute of Metals and Materials ) 75 ( 12 ) 697 - 704 2011.12

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)

Pure titanium is a biocompatible material that is also useful in high-temperature environments, however, wear resistance of the pure titanium is weak. To improve the wear resistance of pure titanium, surface modification is performed using laser beam heating under various laser conditions. The modified surface layer produced by laser melting consists of titanium nitride (TiN), which improves the hardness and the wear resistance. However, the surface of this modified layer is not flat.   In this study, the laser irradiation was performed in a controlled atmosphere and the effects of the atmosphere on the microstructure, hardness, and wear resistance of the irradiated region were investigated. As the pure titanium surface was heated by laser irradiation, a TiN film was formed on its surface without the introduction of cracks. A lamellar structure was also observed under the TiN film. The maximum TiN thickness obtained without cracking or peeling of the base metal was approximately 13 µm. In comparison with the base metal, the hardness and wear resistance of the TiN film were approximately 8 and 22 times higher, respectively.

DOI： 10.2320/jinstmet.75.697

CiNii Article

Other Link： https://ci.nii.ac.jp/naid/10030260305

Surface Nitriding and Improvement of Wear Resistance of Titanium Using Laser Irradiation Reviewed

Tomiko Yamaguchi, Yutaka Yonesho, Kazumasa Nishio

Journal of the Japan Institute of Metals 75 ( 12 ) 697 - 704 2011.12

Interface Microstructure and Mechanical Properties of Aluminum/Copper Stud Welds Reviewed

Tomiko Yamaguchi, Sho Hiramoto, Kazumasa Nishio

49 ( 12 ) 474 - 478 2011.12

Formation of Intermetallic Compounds on the Bond Interface of Aluminum-Clad Copper and its Influence on Bond Tensile Strength Reviewed

117 ( 119 ) 984 - 989 2011.11

Interface Microstructure and Weld Strength of Steel/Aluminum Alloy Joints by Resistance Spot Welding Reviewed

117 ( 119 ) 1895 - 1899 2011.10

Development of Grizzly Plate by Surfacing of High Chromium Cast Iron and Abrasive Waterjet Machining Reviewed

HONDA Tsuguo, KUROKI Hironori, YAMAGUCHI Tomiko, NISHIO Kazumasa

Journal of Japan Foundry Engineering Society ( Japan Foundry Engineering Society ) 83 ( 9 ) 519 - 524 2011.09

Language：Japanese Publishing type：Research paper (scientific journal)

In order to develop wear resistant grizzly plates for sintered ore screening process, a commercial hypereutectic high chromium cast iron containing Nb and V carbides was surfaced by self-shielded tubular-cored arc welding to 32mm thick, 350mm wide and 1000mm long SS400 plates. First, Abrasive Waterjet (AWJ) machinability was investigated using the surfaced SS400 specimens of various thickness, then the abrasion resistance of the deposited metals and conventionally used material was reviewed.   The durability of the newly developed grizzly plates surfaced to 1000mm square SCW490 base metal and machined by AWJ was assessed under the impact and abrading of sintered ore, and compared with conventional cast plates. The main results obtained were as follows ;   (1) When surfacing was carried out with a single torch, transverse cracks generated considerably. On the other hand, the cracks reduced markedly with two-torch surfacing.   (2) The deposited metal showed good abrasion resistance. The AWJ maximum traverse rate however reduced to about half that of SS400 plate.   (3) AWJ machinability significantly reduced when the abrasive waterjets traversed across the cracks, forming uncut zones beneath the cracks by the deflection of the jets.   (4) The newly developed grizzly plates showed about four to six times more durability, while the conventional cast plates only last a couple of months.   (5) Presently, the newly developed grizzly plates are seen to be replacing conventional ones in the plant.

DOI： 10.11279/jfes.83.519

CiNii Article

Other Link： https://ci.nii.ac.jp/naid/10029579889

Formation of Intermetallic compounds on the Bond Interface of Aluminum-Clad Copper and its influence on bond tensile strength

XIE Wei, YAMAGUCHI Tomiko, NISHIO Kazumasa

89 82 - 83 2011.08

レーザ照射によるチタンの表面改質について

西尾一政,山口富子

光技術コンタクト ( 日本オプトメカトロニクス協会 ) 49 ( 7 ) 16 - 21 2011.07

Welding Metallurgy of Steels

Hayakawa, N., Nakamura, S., Wang, K., Mikami, Y., Mochizuki, M., Yamaguchi, T., Koseki, T., Sato, Y.

JOURNAL OF THE JAPAN WELDING SOCIETY ( THE JAPAN WELDING SOCIETY ) 80 ( 5 ) 54 - 57 2011.07

Mechanical properties of aluminium alloy welds by laser beam Reviewed

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

Welding International 25 ( 5 ) 360 - 368 2011.05

Observation of Molten Pool Behavior in TIG Welding of Titanium Plate

WADA Yoji, YOSHIMOTO Tatsuya, HORIKAWA Hideki, MIYAZAKI Koji, YAMAGUCHI Tomiko, NISHIO Kazumasa

Preprints of the National Meeting of JWS ( JAPAN WELDING SOCIETY ) 88 114 - 115 2011.03

Formation of intermetallic phases on the bond interface of aluminum-clad copper Reviewed

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

Journal of the Japan Institute of Metals 75 ( 3 ) 166 - 172 2011.03

Development of cast-iron/steel composite by fusion welding Reviewed

Honda, T., Kuroki, H., Yamaguchi, T., Nishio, K.

Quarterly Journal of the Japan Welding Society 29 ( 1 ) 29 - 34 2011.02

レーザ表面改質法によるチタンの耐磨耗性改善

山口富子,西尾一政

溶射技術 ( 未設定 ) 30 ( 4 ) 72 - 76 2011.02

Evaluation of Carburized Depth of Cracking Tubes in Ethylene Plant by Means of Ultrasonic Technique Reviewed

Tatsuya YOSHIMOTO, Hideki HORIKAWA, Takumi SUGIOKA, Yoji WADA, Tomiko YAMAGUCHI and Kazumasa NISHIO

64th Annualy Assembly of International Institute of Welding (IIW),Commission V, IIW Doc. V-1504-11 2011.01

Formation of Intermetallic compounds and tensile strength on the Bond Interface of Aluminum-Clad Copper

xie wei, yamaguchi tomiko, nishio kazumasa

Preprints of the National Meeting of JWS ( JAPAN WELDING SOCIETY ) 2011 ( 0 ) 38 - 38 2011.01

Computational Fluid Dynamics Analysis of Shielding Gas Behavior in Tungsten Inert Gas Welding of Titanium Plate Reviewed

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

28 ( 4 ) 383 - 390 2010.12

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Papers - YAMAGUCHI Tomiko