750℃时效对GH4742合金疲劳裂纹扩展行为的影响
张星硕1,2,王磊1,2(
),刘杨1,2,王斯堃1,2
),刘杨1,2,王斯堃1,2
Effect of Aging Treatment at 750℃ on Fatigue Crack Propagation Behavior of GH4742 Superalloy
ZHANG Xingshuo1,2,WANG Lei1,2(),LIU Yang1,2,WANG Sikun1,2
),LIU Yang1,2,WANG Sikun1,2
图6. 750℃时效GH4742合金近门槛区疲劳裂纹扩展路径的SEM形貌
Fig.6. Fatigue crack growth morphology in near-threshold regions of GH4742 superalloy (a) SHTed; aged at 750℃ for (b) 100 h; (c) 500 h; (d) 1000 h
