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.
展开▼
