发动机热端部件电子束焊修复接头的高温疲劳裂纹扩展行为  

High Temperature Fatigue Crack Growth Behavior of Electron Beam Welding Repaired Joints for Components of Jet Engine

作　　者：张海泉[1] 张彦华[1] 张行安[2] 

机构地区：[1]北京航空航天大学 [2]北京航空材料研究院

出　　处：《材料工程》1998年第11期17-19,23,共4页Journal of Materials Engineering

摘　　要：研究了力学不均匀性对电子束焊接修复接头疲劳裂纹扩展行为的影响规律。结果表明：由于力学不均匀性的影响，位于修复接头焊缝和热影响区的疲劳裂纹向母材偏转扩展；力学不均匀性与裂纹偏转导致裂纹扩展的驱动力下降，使得焊接区的表观疲劳裂纹扩展速率低于母材。The influence of mechanical inhomogeneity on fatigue crack propagation behavior of electron beam welding repaired joints was studied in this paper It was found that crack deflection occurs while it propagates in repair joint zone because of effect of mechanical inhomogeneity The reason why the crack growth rate of welding area is less than that of matrix metal results from descending of efficiency crack growth driving force due to mechanical inhomogeneity and crack deflection

关 键 词：电子束焊 力学不均匀性 裂纹扩展 航空发动机 

分 类 号：TG405[金属学及工艺—焊接] V261.34[航空宇航科学与技术—航空宇航制造工程]