Fatigue life of 6061 aluminium alloy welding samples both in atmosphere and water

摘要：

　　Aluminium alloy 6061-O and 6061-T4 were received in sheet form of 0.04in nominal thickness.After argon arc welding,the sheets were subjected to a solution heat treatment followed by a quenching and tempering treatment (T62 treatment),and fabricated to specimens.The fatigue tests were carried out using 60Hz,stress ratio 0.1 both in atmosphere and water at room temperature,and loading direction was perpendicular to welding bead.The fracture morphology was examined by scanning electron microscopy (SEM).The results show that the fatigue life in water is considerably decreased,and fatigue strip is not clear compared with in atmosphere.The oxygen content on fracture surface tested in water after dry treatment is much higher than that in atmosphere.The possible reason is proposed.

关键词： fatigue life 6061 aluminium alloy welding bead water atmosphere

作者: S.R.Qiao C.Y.Zhang Hao Ji

作者单位: School of Materials Science and Engineering,Northwestern Polytechnical University,Xi an 710072,Chin First Airplane Design Institute,Xian 710089,China

会议类型: 国际会议

会议名称: International Conference on Airworthiness & Fatigue -7th ICSAELS Series Conference(大飞机安全性能与疲劳国际会议)

会议地点: 北京

会议语种:英文

页码: 83-86

在线出版日期: 2013-03-24（万方平台首次上网日期，不代表论文的发表时间）