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265 results on '"Ryohei Tanaka"'

155. [Untitled]

Author

Yoshihiro Kondo, Takashi Matsuo, and Ryohei Tanaka

Subjects
Applied Mathematics
Published
1983

160. Graphite Precipitation from Austenite in Hypo-Eutectoid Steel

Author

Hidekazu Sueyoshi, Ryohei Tanaka, and Katsuro Suenaga

Subjects
Austenite, Materials science, Mechanics of Materials, Precipitation (chemistry), Metallurgy, Materials Chemistry, Metals and Alloys, Graphite, Condensed Matter Physics, Eutectic system
Published
1985

164. Graphite Precipitation during Isothermal Transformation of Hypo-Eutectoid Alloy Steels

Author

Ryohei Tanaka, Hidekazu Sueyoshi, Katsuro Suenaga, and Akito Morisaki

Subjects
6111 aluminium alloy, Materials science, Precipitation (chemistry), Alloy, Metallurgy, Metals and Alloys, engineering.material, Condensed Matter Physics, Isothermal transformation diagram, Mechanics of Materials, Materials Chemistry, engineering, Graphite, Eutectic system
Published
1981

165. Effect of Carbon on High Temperature Creep Property of a Ni-20Cr Alloy

Author

Takashi Matsuo, Masao Takeyama, Makoto Kikuchi, Ryohei Tanaka, and Junshan Zhang

Subjects
Materials science, Creep, chemistry, Metallurgy, Alloy, Materials Chemistry, Metals and Alloys, engineering, chemistry.chemical_element, Physical and Theoretical Chemistry, engineering.material, Condensed Matter Physics, Carbon
Published
1987

178. Activity of Nitrogen in Austenitic Steels

Author

Makoto Kikuchi and Ryohei Tanaka

Subjects
Austenite, Materials science, chemistry, Metallurgy, Materials Chemistry, Metals and Alloys, chemistry.chemical_element, Physical and Theoretical Chemistry, Condensed Matter Physics, Nitrogen
Published
1975

182. Suppression of grain boundary sliding by second phase particles

Author

Trevor A. Mori, Kazutaka Suzuki, and Ryohei Tanaka

Subjects
Materials science, Metallurgy, General Engineering, Grain Boundary Sliding
Abstract

Confirmation des resultats theoriques par l'etude experimentale effectuee sur un alliage Cu−GeO 2

Published
1985

185. Machinability of Hypo-Eutectoid Graphitic Steels

Author

Toshinori Ohshige, Hidekazu Sueyoshi, Ryohei Tanaka, and Katsuro Suenaga

Subjects
Materials science, Mechanics of Materials, Machinability, Metallurgy, Materials Chemistry, Metals and Alloys, Condensed Matter Physics, Eutectic system
Published
1988

192. Heat resisting steels and superalloys

Author

Ryohei Tanaka

Subjects
Superalloy, Materials science, Mechanics of Materials, Mechanical Engineering, Metallurgy, Materials Chemistry, Metals and Alloys
Published
1986

193. Creep Damage of 1Cr-1Mo-1/4V Steel

Author

Takashi Matsuo, Ryohei Tanaka, Shyuichi Komatsu, and Tetsuya Kisanuki

Subjects
Materials science, Creep, Materials Chemistry, Metals and Alloys, Physical and Theoretical Chemistry, Composite material, Condensed Matter Physics
Published
1984

194. High-temperature deformation and fracture behaviour of Cu-SiO2 bicrystals

Author

Ryohei Tanaka, Satoshi Soeta, Masaharu Kato, and Susumu Onaka

Subjects
Materials science, Mechanical Engineering, Stress–strain curve, Mineralogy, Recrystallization (metallurgy), Fracture mechanics, Fractography, Plasticity, Intergranular fracture, Mechanics of Materials, General Materials Science, Grain boundary, Composite material, Tensile testing
Abstract

Bicrystals of CU-SiO2 dispersion-hardened alloys and of pure copper were tensile tested at various temperatures between 450 and 1050 K at a strain rate of 1.5 x 10−4 sec−1. In the case of pure copper bicrystals, elongation to fracture did not depend significantly on temperature and the fracture mode was invariably transgranular up to 850 K. On the other hand, the ductility of CU-SiO2 bicrystals decreased with increase in temperature and the transition in the fracture mode from transgranular to intergranular occurred at around 450 K. SiO2 particles on grain boundaries play an important role on intergranular fracture by suppressing grain-boundary sliding and also on the retardation of recrystallization during deformation. Two types of Cu-SiO2 bicrystals having different crystal orientation relationships show quite different deformation and fracture behaviour. This can be explained in terms of the contribution of lattice dislocations to the grain-boundary sliding.

Published
1988

195. Strengthening of nickel -base superalloys for nuclear heat exchanger application

Author

T. Matsuo, M. Ueki, M. Takeyama, and Ryohei Tanaka

Subjects
Materials science, business.industry, Mechanical Engineering, Metallurgy, Steelmaking, Superalloy, Solid solution strengthening, Precipitation hardening, Creep, Mechanics of Materials, Heat exchanger, Solid mechanics, General Materials Science, business, Strengthening mechanisms of materials
Abstract

Strengthening mechanisms of nickel-base superalloys have been discussed with the background of the Japanese research and development activities in this field. As candidates for materials of intermediate heat exchangers which will be used for a future programme of nuclear steelmaking systems, two kinds of alloys have successfully been developed in Japan. The designs of these alloys have been reviewed from metallurgical aspects including their composition and creep properties. In addition to the conventional methods to strengthen these alloys, such as solid solution hardening or particle precipitation hardening, a grain-boundary precipitation strengthening due to tungsten-rich α2 phase in the Ni-Cr-W system, would be expected as a further advanced method.

Published
1987

197. Authors

Author

Hubertus Nickel, Tatsuo Kondo, Philip L. Rittenhouse, Kensho Sahira, Toshiki Takeiri, T. H. Bassford, James C. Hosier, Shigeki Shimizu, Yasushi Mutoh, Herbert Aigner, H. Peter Degischer, Erich Hertner, A. C. Lingenfelter, Rikizo Watanabe, Ryohei Tanaka, W. R. Johnson, L. D. Thompson, Thomas A. Lechtenberg, M. R. Warren, A. V. Dean, Philip J. Ennis, Helmut Hoven, Karl Koizlik, Hermann Kirchhöfer, Florian Schubert, Aleksandra Czyrska-Filemonowicz, H. E. McCoy, J. P. Strizak, J. F. King, Junzo Fujioka, Norio Fukasako, Hirokazu Murase, Yukio Nishiyama, G. Sainfort, J. Sannier, M. Cappelaere, J. Grégoire, Wolfgang Jakobeit, Jörn-Peter Pfeifer, Georg Ulrich, James R. Lindgren, Brian E. Thurgood, Robin H. Ryder, and Chia-Chuan Li

Subjects
Nuclear and High Energy Physics, Nuclear Energy and Engineering, Condensed Matter Physics
Published
1984

198. [Untitled]

Author

Toshio FUJITA, Hidekatsu KUKI, Yoshikuni KAWABE, Ryuichi NAKAGAWA, Ryohei TANAKA, Takayuki SHINODA, Akira SUZUKI, Tsugio KANEDA, Eiji NIINA, Haruo KAJI, Hirooki NAKAJIMA, Toru ARAKI, Genjiro MIMA, Junzo TAKAHASHI, Toshimi YAMANE, Yoichi TODA, Toshitaka TAMANO, Osamu FUKUSHIMA, Masamichi TAKAHASHI, Taisuke AKAMATSU, Samon YANAGIMOTO, and Mikio TAUMI

Subjects
Materials Chemistry, Metals and Alloys, Physical and Theoretical Chemistry, Condensed Matter Physics
Published
1965

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