Investigation on fatigue property of the A6N01 high strength aluminum alloy

摘要：

The fatigue fracture and the microstructure of A6N01 high strength aluminum alloy were observed by OM, SEM and TEM, and the low cycle fatigue properties were tested and analyzed. The results of experimentation show that the low cycle fatigue life of A6N01 high strength aluminum alloy is 1.061 x105 cycle in R=0.1, f=97Hz, and δmax=0.75δb. The tensile strength is 308MPa. The fatigue fracture is composed of the initiation zone, the propagation zone, and the sudden fracture zone, which is characteristic of a mixedtype fatigue fracture. The fatigue crack initiates in the surface of A6N01 aluminum alloy sample, while there is no fatigue striation in fatigue crack propagation zone. The β (Mg2Si) transitional strengthening phases are precipitated in A6N01 aluminum alloy, and mostly distributed in grain boundary. The diameter of p strengthening phase is fine, about is l0nm. There is none precipitated zone in width nearby the grain boundary.

关键词： Aluminum alloy Fatigue damage Microstructure

作者: Bo Ding Shanglei Yang Qinglin Lin Xu Chao

作者单位: School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China Technology Center, CSR Sifang Locomotive and Rolling Stock Co., Ltd. Qingdao 266111, China

会议类型: 国际会议

会议名称: 2012 International Symposium on Structural Integrity 2012国际结构完整性学术研讨会 ISSI 2012

会议地点: 济南

会议语种:英文

页码: 157-160

在线出版日期: 2012-10-31（万方平台首次上网日期，不代表论文的发表时间）