A 3-D model for quantification of fatigue weak-link density and strength distribution in an A713 cast aluminum alloy

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• 作者：Lin Yang^a ; Pei Cai^a ; Zhiqiang Xu^b ; Yan Jin^a ; Chunyong Liang^c ; Fuxing Yin^c ; Tongguang Zhai^a ; ^c ; ^{tongguang.zhai@uky.edu}
• 关键词：Porosities ; Fatigue crack nucleation life ; Fatigue weak-link density and strength distribution ; Prediction of crack incubation life ; A713 cast Al alloy
• 刊名：International Journal of Fatigue
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：96
• 期：Complete
• 页码：185-195
• 全文大小：3200 K
• 卷排序：96

文摘

A 3-D model was developed to quantify fatigue weak-links in Al cast alloys. The simulated cracking rate at pores was a Weibull function of the cyclic stress. The simulated and experimental weak-link strength distributions were consistent. The model was validated by the experimental results in A713 Al alloys. The minimum critical pore size for crack initiation was 11 μm at 100%σy.