Cryogenic mechanical properties of Ti-6Al-4V alloys with three levels of oxygen content
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概要
- 論文の詳細を見る
Tensile, fracture toughness, and high cycle fatigue tests were done at 293, 77, and 4 K for Ti-6A1-4V alloys with three levels of oxygen content. The alloys were investigated both in as-forged condition and in the rolled condition. Rolling did not necessarily make a grains finer, but changed the shape from plate-like to globular. Strengths depended mainly on the oxygen content; the lower content produced lower strengths. The alloy with lowest oxygen content showed the best ductility at 4 K. The fracture toughness at cryogenic temperature was also enhanced by the reduction of oxygen. In the lowest oxygen alloy, no drop in the fracture toughness was observed between 293 and 4 K. Fatigue properties were influenced by the forming process. The rolled materials had higher fatigue strength than the forged materials. The difference was accentuated at 4 K. This is believed to be due to the difference in the morphology of a grains. The lowest oxygen alloy showed the highest fatigue strength at 4 K.
- 日本鉄鋼協会の論文
著者
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Umezawa O
Yokohama National Univ. Yokohama Jpn
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Umezawa Osamu
National Institute For Materials Science
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Ishikawa Keisuke
First Research Group National Research Institute For Metals
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Ogata Toshio
Materials Information Technology Station National Institute For Materials Science (mits/nims)
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Nagai K
Metallurgical Processing Group Steel Research Center National Institute For Materials Science
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Yuri Tetsumi
Materials Information Technology Station National Institute For Materials Science (mits/nims)
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Umezawa Osamu
National Research Institute For Metals
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Nagai Kotobu
Tsukuba Laboratories, National Research Institute for Metals
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Yuri Tetsumi
Tsukuba Laboratories, National Research Institute for Metals
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Ogata Toshio
Tsukuba Laboratories, National Research Institute for Metals
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Umezawa Osamu
Tsukuba Laboratories, National Research Institute for Metals
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Ishikawa Keisuke
Tsukuba Laboratories, National Research Institute for Metals
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Nishimura Takashi
Titanium Metals Technology Control Department, Kobe Steel, Ltd.
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Mizoguchi Takao
Mechanical Engineering Research Laboratory, Kobe Steel, Ltd.
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Ito Yoshimasa
Materials Research Laboratory, Kobe Steel, Ltd.
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