750℃时效对GH4742合金疲劳裂纹扩展行为的影响

张星硕,王磊,刘杨,王斯堃

Effect of Aging Treatment at 750℃ on Fatigue Crack Propagation Behavior of GH4742 Superalloy

Xingshuo ZHANG,Lei WANG,Yang LIU,Sikun WANG

表1 750℃时效GH4742合金疲劳裂纹扩展速率Paris公式

Table 1 Paris formula of GH4742 superalloy aged at 750℃

Sample Paris formula SHT da/dN=1.62011×10-12(ΔK) 3.14277 A da/dN=2.04743×10-13(ΔK) 3.81455 B da/dN=1.72628×10-12(ΔK) 3.13395 C da/dN=6.20958×10-13(ΔK) 3.47146