Crack closure effect and crack growth behavior in GH2036 superalloy plates under combined high and low cycle fatigue

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• 作者：Dianyin Hu^a ; ^b ; ^c ; Qian Yang^a ; Huawei Liu^d ; Jianxing Mao^a ; Fanchao Meng^e ; Yanfei Wang^f ; Mengxi Ren^g ; Rongqiao Wang^a ; ^b ; ^c ; ^{wangrq@buaa.edu.cn}
• 关键词：Combined cycle fatigue ; Crack closure ; Fatigue crack growth ; Residual crack tip opening displacement ; GH2036 superalloy
• 刊名：International Journal of Fatigue
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：95
• 期：Complete
• 页码：90-103
• 全文大小：4871 K
• 卷排序：95

文摘

The crack closure is only present at low stress ratio for GH2036 superalloy. The large HCF amplitude and cycle ratio increase crack growth rate. Intergranular failure leads to an increased crack growth rate at a high cycle ratio. A new model is developed to describe crack growth behavior under CCF loading.