Fatigue properties of thin superalloys electron beam welded joint
- 作者：Wu BingGuo HaidingGong ShuiliZhang Jianxun
- 会议时间：2012-12-01
- 关键词：superalloys ; electron beam welding ; fatigue properties ; SEM analysis
- 作者单位：Wu Bing(State key laboratory for mechanical behavior of materials, Xi'an Jiaotong University, Xi'an, P. R. China;Science and Technology on Power Beam Processes Laboratory, Bejjing Aeronautical Manufacturing Technology Research Institute, Beijing, P. R. China)Guo Haiding(Nanjing University of Aeronautics and Astronautics;Nanjing 210016;China)Gong Shuili(Science and Technology on Power Beam Processes Laboratory, Bejjing Aeronautical Manufacturing Technology Research Institute, Beijing, P. R. China)Zhang Jianxun(State key laboratory for mechanical behavior of materials, Xi'an Jiaotong University, Xi'an, P. R. China)
- 母体文献：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论文集
- 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
- 主办单位：中国工程院
- 语种：chi
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.