THE UNIAXIAL FATIGUE CHARACTERISTICS AND FATIGUE FRACTURE OBSERVATION FOR AN A356-T6 ALUMINUM ALLOY

摘要：

In this paper, the uniaxial fatigue properties of an A356-T6 aluminum alloy under different stress amplitudes was tested and analyzed. The fatigue life under different stress amplitudes and the cycled hardening conditions during the fatigue process were carefully observed. Besides, the cross-stress-loading uniaxial fatigue of this alloy was also carried out and compared with the single-stress-loading uniaxial fatigue. The fatigue fracture was then carefully examined with the method of SEM (Scanning Electron Microstructure). The EDX (Energy Dispersive X-ray) method was also used here to identify the element composition of the inclusions in the alloy. The inner microstructure of the fatigue fracture was observed by TEM (Transmitted Electron Microscopy), in which the dislocations and precipitates were detailedly displayed and analyzed.

作者: Xiaoshan Liu Guoqiu He Songjie Fan Qigui Wang

作者单位: Institute for Metal-based Materials Research, School of Material Science and Engineering, Tongji Uni GM- Powertrain, 823 Joslyn Road, Pontiac, MI 48340,USA

会议类型: 国际会议

会议名称: 第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-10-15（万方平台首次上网日期，不代表论文的发表时间）