INVESTIGATION OF THE LOW-CYCLE FATIGUE AND FATIGUE CRACK GROWTH BEHAVIORS OF P91 BASE METAL AND WELD JOINTS
来源期刊：Acta Metallurgica Sinica2004年第4期
论文作者：M.M.Yu H.C.Yang Y.Tu J.Zhao
Key words：P91 pipe; low-cycle fatigue; fatigue crack growth;
Abstract: Low cycle fatigue tests and crack growth propagations tests on P91 pipe base metal and its weld joints were conducted at three different temperatures: room temperature,550℃ and 575℃. The strain-life was analyzed, and the changes in fatigue life behavior and fatigue growth rates with increasing temperature were discussed. The different properties of the base metal and its weld joint have been analyzed.
M.M.Yu1，H.C.Yang1，Y.Tu1，J.Zhao2
(1.Dongfang Boiler (Group;
2.Department of Materials Engineering, Dalian University of Technology, Dalian 116023, China)
Abstract:Low cycle fatigue tests and crack growth propagations tests on P91 pipe base metal and its weld joints were conducted at three different temperatures: room temperature,550℃ and 575℃. The strain-life was analyzed, and the changes in fatigue life behavior and fatigue growth rates with increasing temperature were discussed. The different properties of the base metal and its weld joint have been analyzed.
Key words:P91 pipe; low-cycle fatigue; fatigue crack growth;
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