High-temperature low-cycle fatigue behaviors of GH4169 superalloy

摘要：

　　The aim of this paper was to investigate effects of microstructure and total strain range on the high-temperature low-cycle fatigue (HTLCF) behavior of nickel-based GH4169 superalloy.Results showed that HTLCF lives of specimens obtained from different regions of inhomogeneous radical forging disc were determined by their microstructures, such as the uniformity ratio of grain size and the distribution of δ phase along the grain boundary.Typical fatigue characteristics of all specimens were investigated after HTLCF tests through the analysis on fracture morphologies and secondary cracks.Then, a life prediction method was proposed on the basis of optimization of parameters in ε-N curves.

关键词： GH4169 superalloy High temperature Low cycle fatigue Total strain range Grain size Life prediction

作者: Run-Zi Wang Xian-Cheng Zhang Feng Liu Yi-Ning Wang Zhengdong Wang

作者单位: Key Laboratory of Pressure Systems and Safety,Ministry of Education,East China University of Science School of Mechanical Engineering,Liaoning University of Petro-Chemical Technology,Fushun 113000,Chin Special Equipment Safety Supervision Inspection Institute of Jiangsu Province,Nanjing 210036,China

会议类型: 国际会议

会议名称: 2015 International Symposium on Structural Integrity(2015年国际结构完整性学术会议)

会议地点: 沈阳

会议语种:英文

页码: 43-52

在线出版日期: 2015-05-16（万方平台首次上网日期，不代表论文的发表时间）