摘要
通过不同取向DD6单晶高温合金980℃/250MPa持久测试,研究了取向对980℃持久性能的影响。结果表明:[001]取向偏离主应力轴15°以内,DD6单晶高温合金980℃/250MPa持久寿命相当,没有各向异性。这主要是由于近[001]取向DD6单晶高温合金多个〈110〉{111}滑移系共同作用的结果。同时,原子扩散造成的γ′筏排和γ/γ′相界面形成的位错网也降低持久性能各向异性。
The DD6 single crystal superalloy with various orientations was tested at 980℃/250MPa.The influence of orientation on the stress rupture properties at 980℃ was investigated.The results showed that DD6 single crystal superalloy with orientation deviated from direction within 15° exhibited almost the same stress rupture lives at 980℃/250MPa,and there was no anisotropic behavior.The reason of no anisotropic stress rupture properties at 980℃/250MPa was multiple 〈110〉{111} slip systems operated.The γ′raft caused by the atom diffusion and the dislocation networks formed on γ/γ′also reduced the anisotropy of stress rupture properties.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2012年第4期1-5,共5页
Journal of Materials Engineering
关键词
DD6
单晶高温合金
持久性能
各项异性
DD6
single crystal superalloy
stress rupture property
anisotropy
