Three‐dimensional reconstruction of material micropores based on stereology and fatigue life prediction. Issue 7 (20th July 2020)

• Record Type: Journal Article
• Authors: Sun, M.; Qu, C.; Zhang, G.; Zheng, Y.; Xu, Zhiqiang
• Is Part Of: Materialwissenschaft und Werkstofftechnik. Volume 51:Issue 7(2020:Jul.)
• Page Start: 888
• Page End: 901
• Publication Date: 2020-07-20
• Subjects: Al−Zn713 alloy castings -- fatigue life -- micropore -- stereology -- finite element; AlZn713-Gusslegierung -- Ermüdungslebensdauer -- Mikroporen -- Stereologie -- Finite-Elemente; Materials -- Periodicals; Materials -- Testing -- Periodicals; 620.1
• DOI: 10.1002/mawe.201900134
• Languages: English
• ISSNs: 0933-5137

Abstract

Abstract: In this paper, the fatigue life of Al‐Zn713 alloy castings was studied. Based on stereological theory and finite element method, a new idea of material fatigue life prediction was proposed. Goldsmith‐Cruz‐Orive method was used to reconstruct the three‐dimensional distribution of micropores that based on the two‐dimensional distribution information. The stress analysis of the reconstructed three‐dimensional geometric model was carried out by finite element method. Combining with the modified Coffin‐Manson formula, a material fatigue life prediction system based on the distribution of micropores was established, which opened up a new direction for the research of material fatigue behavior and fatigue life. Abstract : In this paper, a novel method was proposed to predict the material fatigue life. The viewpoint is infer the distribution of micropores in the material through the above stereology reconstruction. Then carrying out the finite element analysis of the stress near the micropore to predict the fatigue life of this material according to the Coffin‐Manson formula. The method can predict the fatigue life just based on the micropore distribution obtained by metallographic observation to instead of the time‐consuming cyclic loading test.