CREEP LIFE ASSESSMENT OF 2.25Cr-1Mo PIPING STEEL AND OF ITS SIMULATED HAZ MATERIAL
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概要
- 論文の詳細を見る
A creep life assessment method was proposed for base metal and HAZ of 2.25Cr-1Mo steel STPA24 used in high temperature steam piping of fossil power plants. Microstructuiral observations and hardness measurements were carried out for base metal and simulated HAZ after thermal aging and creep testing. Simulated HAZ material showed significant softening during thermal and creep exposure, but base metal showed less softening. Hardness equation was established based on the kinetics of carbide coarsening and recovery of dislocation substructure. Creep damage was evaluated by damage mechanics in combination with softening equation and creep constitutive equation. The proposed method can be applied to assess creep life of Cr-Mo steel HAZ in actual components.
- 社団法人日本材料学会の論文
- 1997-12-15
著者
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Okabe Nagatoshi
Graduate school of Science and Engineering, Ehime University
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Fujiyama Kazunari
Heavy Apparatus Engineering Laboratory Toshiba Corporation
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ISEKI Takashi
Keihin Product Operations, Toshiba Corporation
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KOMATSU Atsushi
Keihin Product Operations, Toshiba Corporation
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OKABE Nagatoshi
Department of Mechanical Engineering, Ehime University
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OKABE Nagatoshi
Toshiba Corporation
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Okabe N
Ehime Univ. Ehime
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Okabe Nagatoshi
Ehime University
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Okabe Nagatoshi
Graduate School Of Science And Engineering Ehime University
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Okabe Nagatoshi
Department Of Mechanical Engineering Ehime University
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Iseki Takashi
Keihin Product Operations Toshiba Corporation
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Komatsu A
Nec Hiroshima Corp. Higashihiroshima Jpn
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