Quantitative Analysis on Fatigue Fracture of Spray Formed GH738 Alloy
Low-cycle fatigue (LCF) fracture of the spray formed GH738 alloy was investigated under total strain controlled mode at 650°C.Basic theory for evaluating fatigue lives by fatigue striations has been introduced.The crack length a and the crack propagation rate da/dN were measured and the curve of da/dN in crack propagation zone was obtained with Paris formula and tabulation trapezoidal formula,respectively.The size and symmetry of rapid fracture zone of fatigue were also studied.The results showed that the relationship of a and N was linear with tabulation trapezoidal formula,and the da/dN and a was conic with Paris formula.At last,quantitative analysis of fatigue fracture was also discussed.
Low-cycle fatigue GH738 alloy Spray forming Fracture analysis
Dongye Yang Wenyong Xu Zhou Li Guoqing Zhang Zhiliang Ning Jianfei Sun
School of Materials Science and Engineering, Harbin Institute of Technology,Harbin, 150001, China Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institut
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
564-568
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）