Fatigue properties of thin superalloys electron beam welded joint

摘要：

　　The fatigue properties of thin superalloys electron beam welded joint have been investigated.Tests have been performed in air at 25 ℃ under stress control.S-N curve has been achieved,and test data dispersion has been analyzed.Damage processes have been characterized on the fracture surface using scanning electron microscopy (SEM).It is demonstrated that fatigue dispersion coefficient is 5.9 when the reliability is 99.87%.And fatigue fracture of GH4169 EB-joint is brittle.The fatigue origin generally appears on the specimen surface,a radial propagation can be observed from the initiation site.Part of specimens appears a plurality of fatigue source and presents a multi-source fatigue failure.

关键词： superalloys electron beam welding fatigue properties SEM analysis

作者: Wu Bing Guo Haiding Gong Shuili Zhang Jianxun

作者单位: State key laboratory for mechanical behavior of materials, Xi”an Jiaotong University, Xi”an, P. R. C Nanjing University of Aeronautics and Astronautics;Nanjing 210016;China Science and Technology on Power Beam Processes Laboratory, Bejjing Aeronautical Manufacturing Techno State key laboratory for mechanical behavior of materials, Xi”an Jiaotong University, Xi”an, P. R. C

会议类型: 国内会议

会议名称: 第154场中国工程科技论坛——2012年增材制造技术国际论坛暨第六届全国增材制造技术学术会议

会议地点: 武汉

会议语种:英文

页码: 1-9

在线出版日期: 2012-12-01（万方平台首次上网日期，不代表论文的发表时间）