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Evaluation method of creep-fatigue damage of 316FR stainless steel welded joint
The evaluation method of creep-fatigue damage of 316FR stainless steel welded joint was developed. Inelastic analyses were carried out to investigate the behavior of strain in the vicinity of welded joint of realistic components subjected to thermal load. In theses analyses, difference between material characteristics of welded joint elements were taken into consideration. Significant enhancement of strain was not found. Higher stress in weld metal during creep relaxation process due to higher cyclic stress response and slower strain rate caused larger creep damage than that of base metal by the time fraction rule. Based on the results of these analyses, the evaluation method was proposed, which considered reduction in fatigue strength of weld metal and creep damage multiplication according to high initial stress and low creep strain rate for weld metal. The validity of the method was verified with the results of creep-fatigue tests of a structural model.
Evaluation method of creep-fatigue damage of 316FR stainless steel welded joint
The evaluation method of creep-fatigue damage of 316FR stainless steel welded joint was developed. Inelastic analyses were carried out to investigate the behavior of strain in the vicinity of welded joint of realistic components subjected to thermal load. In theses analyses, difference between material characteristics of welded joint elements were taken into consideration. Significant enhancement of strain was not found. Higher stress in weld metal during creep relaxation process due to higher cyclic stress response and slower strain rate caused larger creep damage than that of base metal by the time fraction rule. Based on the results of these analyses, the evaluation method was proposed, which considered reduction in fatigue strength of weld metal and creep damage multiplication according to high initial stress and low creep strain rate for weld metal. The validity of the method was verified with the results of creep-fatigue tests of a structural model.
Evaluation method of creep-fatigue damage of 316FR stainless steel welded joint
Otani, T. (author) / Koto, H. (author) / Wada, H. (author) / Fujioka, T. (author)
1998
12 Seiten, 5 Quellen
Conference paper
English
| British Library Online Contents | 1998
Microstructural creep damage in welded joints of 316L stainless steel
| British Library Online Contents | 1998