Effect of pre-strain on fatigue crack growth of 2E12 aluminum alloy

摘要：

The influences of pre-strain on the mechanical property and fatigue crack growth of 2E12 aluminum alloy were evaluated by SEM,TEM,mechanical property and fatigue tests.The axial fatigue tests were conducted under a constant amplitude sinusoidal wave loading at stress ratio of 0.1 in laboratory air and salt fog at room temperature.The results show that the yield stress of pre strain material is higher than that of the material without undergoing pre-strain,but pre-strain can not make the increase of the growth rate of fatigue crack.Fatigue crack growth rates of the alloy in salt fog are higher than those in air.The increased fatigue crack growth of the alloy in a given environment and more brittle striations can be observed in salt fog.

关键词： 2E12 aluminum alloy pre-strain fatigue crack growth salt fog

作者: YI Dan-qing YANG Sheng DENG Bin ZHOU Ming-zhe

作者单位: School of Materials Science and Engineering,Central South University,Changsha 410083,China;Key Labor School of Materials Science and Engineering,Central South University,Changsha 410083,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）