文献类型：期刊文献

英文题名：The role of anelastic recovery in the creep-fatigue interaction of 9-12% Cr steel at high temperature

作者：Zhang, Shang-Lin[1,2,3];Xuan, Fu-Zhen[1,2,3];Guo, Su-Juan[1,2,3];Zhao, Peng[1,2,3]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Shanghai 200237, Peoples R China

年份：2017

卷号：122

起止页码：95

外文期刊名：INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES

收录：;EI(收录号：20170303244164);WOS:【SCI-EXPANDED(收录号:WOS:000397684000008)】；

基金：The authors are grateful for the supports provided by the National Natural Science Foundation of China (51325504, 51475167) and the Program of Shanghai Subject Chief Scientist (14XD1401300).

语种：英文

外文关键词：Creep-fatigue interaction; Anelastic recovery; Life prediction

摘要：Fatigue tests of 9-12% Cr ferrite steel with various hold times at both peak and valley points were conducted under stress control at 898 K. The role of anelastic recovery in the creep-fatigue interaction was discussed systematically. Results indicate that anelastic strain increases primarily with the cycle increase and then decreases slowly until the specimen failed during the unloading process. By contrast, the kinetics of anelastic recovery decreases during the unloading process while is insensitive to the peak stress and hold time at the early stage. In addition, the creep-fatigue (cyclic creep) interaction is much decelerated due to the anelastic recovery compared to the static creep state. A modified life prediction model is developed accordingly under the frame of ductility exhaustion concept by incorporating the effect of anelastic recovery. A good agreement with the experimental data is achieved and thus provides us confidence in the use of the modified model in practice.