文献类型：期刊文献

英文题名：Fatigue behavior and bilinear Coffin-Manson plots of Ni-based GH4169 alloy with different volume fractions of δ phase

作者：Zhang, Xian-Cheng[1];Li, Hai-Cong[1];Zeng, Xu[1];Tu, Shan-Tung[1];Zhang, Cheng-Cheng[2];Wang, Qiang-Qi[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China;[2]AECC Commercial Aircraft Engine Co LTD, Shanghai Engn Res Ctr Commercial Aircraft Engine, Shanghai 201108, Peoples R China

年份：2017

卷号：682

起止页码：12

外文期刊名：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录：;EI(收录号：20164703048364);WOS:【SCI-EXPANDED(收录号:WOS:000393003800002)】；

基金：The authors would like to acknowledge gratefully for the financial support through National Natural Science Foundations of China (51371082 and 51322510). The author X.C. Zhang is also grateful for the support by Shanghai Pujiang Program, Shanghai Technology Innovation Program of SHEITC (CXY-2015-001), and Fok Ying Tung Education Foundation.

语种：英文

外文关键词：Low cycle fatigue; Cyclic stress/strain curve; Coffin-Manson plot; delta phase; Nickel-based alloy

摘要：The effect of volume fraction of delta phase, which was changed through changing the heat treatment conditions, on the strain-controlled fatigue behavior of Nickel-based GH4169 alloys at room temperature was investigated. The delta phase had almost no effect on fatigue life at strain amplitude higher than 0.5%. However, the fatigue life increased with increasing volume fraction of (delta phase at the strain amplitude of 0.4%. The alloys with three different volume fractions of delta phase exhibited dual-slope Coffin-Manson relationships, which could be attributed to the changes in the deformation mode from twinning to slip bands as well as the crack initiation mode from transgranular to intergranular with increasing strain amplitude.