文献类型：期刊文献

英文题名：A comparative study on the cyclic plasticity and fatigue failure behavior of different subzones in CrNiMoV steel welded joint

作者：Guo, Su-Juan[1];Wang, Run-Zi[1];Chen, Haofeng[1,2];Xuan, Fu-Zhen[1]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, MOE, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Univ Strathclyde, Dept Mech & Aerosp Engn, Glasgow G1 1XJ, Lanark, Scotland

年份：2019

卷号：150

起止页码：66

外文期刊名：INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES

收录：;EI(收录号：20184205956746);WOS:【SCI-EXPANDED(收录号:WOS:000458597800007)】；

基金：The authors are grateful for the supports provided by the National Natural Science Foundation of China (11872181, 11302079) and Shanghai Natural Science Foundation (18ZR1408900).

语种：英文

外文关键词：Cyclic softening; Ratchetting; Low cycle fatigue; Failure location

摘要：The cyclic plasticity and the low cycle fatigue failure behavior of the weld metal (WM) and base metal (BM) of the CrNiMoV steel welded joint under the strain and stress-control modes were investigated respectively. Significant cyclic softening was observed for both the WM and BM under the low cycle fatigue tests with the two control modes. Besides, obvious ratcheting happened in the WM and BM under the stress-controlled cyclic loading conditions. It is shown that both the WM and BM exhibited lower fatigue strength at the stress control mode than that at the strain control mode due to the influence of tension-compression asymmetry. Meanwhile, the WM showed larger cyclic softening rate, lower ratchetting deformation and fatigue strength than the BM under the same loading levels. The failure location of the WM specimens shifted from BM region (nearby the heat affected zone) to the center of WM with the increasing of strain amplitude under the strain-controlled tests, which can be explained with the similar maximum equivalent plastic strain amplitude location shifting behavior observed from the corresponding finite element simulations.