Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Takateru Yamamuro is active.

Publication


Featured researches published by Takateru Yamamuro.


Materials Science Forum | 2011

Explosive Welding of ZrTiCuNiBe Bulk Metallic Glass to Crystalline Cu Plate

Akira Chiba; Yoshihito Kawamura; Minoru Nishida; Takateru Yamamuro

Metallic glass or amorphous alloys have been gaining popularity due to their low density, high strength, high fracture toughness, good corrosion and good wear resistance. Especially, bulk metallic glasses (BMGs), which are made in bulk form with a thickness of ~10mm at slow cooling rates of the order of 1~100K/s, have been noted as an industrial application. The welding to other materials becomes very important. Explosive welding of most popular Zr41.2Ti13.8Cu10Ni12.5Be22.5 bulk metallic glass to crystalline pure Cu plate is investigated in this paper and the BMG was found to retain the amorphous structure. The sound bonding with other materials is expected to push forward the application of BMGs for industrial usage.


Materials Science Forum | 2004

Effect of heat treatment on formation of columnar ferrite structure in explosively welded titanium/hypoeutectoid steel joints

Yasuhiro Morizono; Minoru Nishida; Akira Chiba; Takateru Yamamuro

Explosive welding of titanium to hypoeutectoid steel (0.09 mass%C) was carried out, and interfacial aspects of as-welded and heat treated states have been investigated with a focus on microstructures of the steel. In as-welded joint, plastic flow occurred by high velocity collision was observed in the vicinity of the interface. The steel in the joints showed equiaxed structure consisting of ferrite and pearlite even after prolonged heat treatment up to 1173 K. Columnar grains were generated in the steel near the interface by the heat treatment at 1223 K and above. Although the region of the columnar ferrite structure increased with increasing heating temperature and holding time, texture with specific crystal orientation was not confirmed. It was found that such a microstructural change in the steel was closely related to constituent phases formed at the bonding interface. The formation mechanism of the columnar structure was also discussed.


Materials Science Forum | 2007

Surface Modification Technique Using Interfacial Reaction between Ti-Al Alloy and Steel

Yasuhiro Morizono; Minoru Nishida; Yoshikazu Kodama; Takateru Yamamuro; Yasuhide Ohno

Diffusion bonding of Ti and Ti-Al (Ti-10, 20 and 40 mol%Al) alloys to high carbon steel was carried out at 1073 and 1273 K for 3.6 ks in a vacuum. It has been found that the joint with Ti-20 mol%Al alloy is separated in the vicinity of the interface promptly after the bonding treatment at 1273 K. Such a phenomenon could not be observed in other Ti-Al alloy/steel joints, and the Ti-20 mol%Al alloy/steel joint bonded at 1073 K showed a high strength of about 170 MPa. Therefore, this phenomenon depends on the bonding temperature and the composition of the Ti-Al alloys. From the observation results of the interface, it is thought that the diffusion of constituent elements across the interface is part of the reason for the separation phenomenon. The separated surface of the Ti-20 mol%Al alloy side showed diffraction peaks of TiC phase by XRD. Its Vickers hardness was about 1200 and approximately 4 times higher than that before the bonding treatment. It is expected that the separation phenomenon at the Ti-20 mol%Al alloy/steel interface serves surface modification of titanium materials, which show poor wear resistance.


Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2004

Formation process of unique microstructure in rapidly solidified Mg97Zn1Y2 alloy

Minoru Nishida; Yoshihito Kawamura; Takateru Yamamuro


Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2006

Effect of heat treatment atmosphere on the multistage martensitic transformation in aged Ni-rich Ti-Ni alloys

Kousuke Fujishima; Minoru Nishida; Yasuhiro Morizono; Koichi Yamaguchi; Kentarou Ishiuchi; Takateru Yamamuro


Materials Transactions | 2004

Diffusion Bonding of TiAl Alloy to Eutectoid Steel and its Interfacial Self-destruction Behavior

Yasuhiro Morizono; Minoru Nishida; Akira Chiba; Takateru Yamamuro; Yusuke Kanamori; Takanobu Terai


Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2006

Phase equilibrium and martensitic transformation in near equiatomic TiPd alloys

Takateru Yamamuro; Yasuhiro Morizono; J. Honjyo; Minoru Nishida


Materials Transactions | 2007

Interfacial reaction between Ti-Al binary alloys and high carbon steel

Yasuhiro Morizono; Takateru Yamamuro; Minoru Nishida


Tetsu To Hagane-journal of The Iron and Steel Institute of Japan | 2012

Simplified carburizing process for stainless steel

Yasuhiro Morizono; Sadahiro Tsurekawa; Takateru Yamamuro


Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2006

Martensitic transformation and phase equilibrium in near equiatomic Zr–Pd alloys

T. Nishiura; Takateru Yamamuro; D. Hashimoto; Yasuhiro Morizono; Minoru Nishida

Collaboration


Dive into the Takateru Yamamuro's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge