Creep Fracture Analysis of W Strengthened High Cr Steel Weldment
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概要
- 論文の詳細を見る
Type IV cracking in heat affected zone (HAZ) of weldment is a problem for advanced high Cr ferritic steels. The present paper investigates the creep properties and microstructures of W strengthened P122 steel weldment at 923K. From the investigation of creep properties of simulated HAZ, it is clarified that heating up to around Ac_3 during welding minimized the grain size and creep strength. Most of the welded joint specimens were type IV fractured in fine-grained HAZ and resulted in shorter creep lives than those of the base metals. Electron beam welded joint with very narrow HAZ also showed the brittle type IV fracture due to the formation of creep voids and cracks. The growth of intergranular precipitates was faster for fine-grained HAZ. On the basis of experimental results, the FEM code that simulates type IV crack growth behavior has been developed. The vacancy diffusion under multi-axial stress condition in HAZ of weldment is analyzed.
- 社団法人日本材料学会の論文
- 2003-03-15
著者
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Abe F
National Institute For Materials Science
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Hongo H
National Institute For Materials Science
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Hongo Hiromichi
National Institute For Materials Science
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WATANABE Takashi
National Institute for Materials Science
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TABUCHI Masaaki
National Institute for Materials Science
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MATSUI Masakazu
National Institute for Materials Science
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KUBO Kiyoshi
National Institute for Materials Science
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ABE Fujio
National Institute for Materials Science
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Watanabe T
Ntt Basic Research Laboratory
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Watanabe T
Department Of Applied Physics Nagoya University:crest Japan Science And Technology Corporation (jst)
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Watanabe T
Kobe Univ. Kobe
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Matsui M
National Institute For Materials Science:(present Address)mitsubishi Heavy Industries
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Matsui Masakazu
National Institute For Material Science
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Watanabe Tomohiko
Department Of Mechanical Engineering Nagoya University
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Abe F
Steel Research Center National Institute For Materials Seienee
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Abe Fujio
National Institute Of Materials Science
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Abe Fujio
Frontier Research Center For Structural Materials National Research Institute For Metals
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Abe Fujio
Steel Research Center (src) National Institute For Materials Science
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Watanabe Tomohiro
National Institute For Materials Science
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Matsui Masakazu
National Institute For Materials Science:(present Address)mitsubishi Heavy Industries
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WATANABE Toshio
College of General Education,Osaka University
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Abe Fujio
Structural Metals Center National Institute For Materials Science
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渡辺 二太
Department Of Applied Physics Nagoya University:crest Japan Science And Technology Corporation (jst)
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Tabuchi Masaaki
National Inst. For Materials Science Independent Administrative Institution
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Tabuchi Masaaki
National Research Institute For Metals
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Tabuchi Masaaki
National Research Institute Of Metals
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Abe Fujio
Steel Research Center National Institute For Materials Science
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Abe Fujio
Tsukuba Laboratories National Research Institute For Metals
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Watanabe Tadashi
Tokyo University Of Information Sciences
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Watanabe Takashi
National Institute for Agro-environmental Sciences
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