粉末高温合金FGH96惯性摩擦焊接头室温疲劳裂纹扩展速率测试与分析  

Testing and Analysis of Rate of Fatigue Crack Propagation of P/M Superalloy FGH96 Inertia Friction Welding Joint

作　　者：何胜春[1] 廖云建[1] 张田仓[1] 杨美[2] 吴素君[2] 

机构地区：[1]中航工业北京航空制造工程研究所航空焊接与连接技术航空科技重点实验室 [2]北京航空航天大学

出　　处：《航空制造技术》2015年第11期77-79,共3页Aeronautical Manufacturing Technology

摘　　要：FGH96是采用损伤容限设计思想研制的新型粉末高温合金,是满足高推比、高燃效发动机使用要求的涡轮盘、环形件和其他热端部件的理想材料。FGH96惯性摩擦焊接头的细晶组织对裂纹扩展的阻碍作用使得其裂纹扩展速率小于母材。母材和接头断裂路径均为穿晶断裂。P/M powder superalloy FGH96 is the late-model superalloy designed by the method of dam-age tolerance. FGH96 is a kind of perfect material for turbine disk, loop-forming element and other components assembly of hot end to meet the challenge of high thrust-weight ratio and high efifciency aircraft engine. The rate of fatigue crack propagation of inertia friction welding joint is slower than the matrix because of ifne grain. The dimple of the joint is also less than the matrix. The fracture paths of joint and matrix are transcrystalline fracture.

关 键 词：粉末高温合金 惯性摩擦焊 疲劳裂纹扩展速率 

分 类 号：V261.34[航空宇航科学与技术—航空宇航制造工程] TG441.7[金属学及工艺—焊接]