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9. 750℃时效GH4742合金近门槛区、Paris区和快速扩展区裂纹扩展断口的形貌
Fig.9. Fatigue crack growth morphology of near-threshold regions (a, d, g, j), Paris regions (b, e, h, k) and rapid propagation regions (c, f, i, l) of GH4742 superalloy (a-c) SHTed; aged at 750℃ for (d-f) 100 h; (g-i) 500 h and (j-l) 1000 h
