Role of LPSO Phase in Crack Propagation Behavior of an As-Cast Mg-Y-Zn Alloy Subjected to Dynamic Loadings

In this work, the role of long period stacking ordered (LPSO) phase in the crack propagation behavior of an as-cast Mg_95.5Y₃Zn_1.5 alloy was investigated by dynamic four-point bent tests. The as-cast Mg_95.5Y₃Zn_1.5 alloy is mainly composed of Mg matrix, 18R LPSO phase located at the grain boundaries and 14H LPSO phase located within the Mg matrix. The alloy exhibits excellent dynamic mechanical properties; the yield stress, maximum stress and strain to failure are 190.51 ± 3.52 MPa, 378.32 ± 4.26 MPa and 0.168 ± 0.006, respectively, at the strain rate of ~3000 s⁻¹. The LPSO phase effectively hinders dynamic crack propagation in four typical ways, including crack tip blunting, crack opening inhibition, crack deflection and crack bridging, which are beneficial to the mechanical properties of the alloy under dynamic loadings. View Full-Text

Keywords: Mg alloy; LPSO phase; crack propagation; dynamic loading

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MDPI and ACS Style

Shi, X.; Long, Y.; Zhang, H.; Chen, L.; Zhou, Y.; Yu, X.; Yu, X.; Cai, L.; Leng, Z. Role of LPSO Phase in Crack Propagation Behavior of an As-Cast Mg-Y-Zn Alloy Subjected to Dynamic Loadings. Materials 2019, 12, 498. https://doi.org/10.3390/ma12030498

AMA Style

Shi X, Long Y, Zhang H, Chen L, Zhou Y, Yu X, Yu X, Cai L, Leng Z. Role of LPSO Phase in Crack Propagation Behavior of an As-Cast Mg-Y-Zn Alloy Subjected to Dynamic Loadings. Materials. 2019; 12(3):498. https://doi.org/10.3390/ma12030498

Chicago/Turabian Style

Shi, Xuezhi, Yunqian Long, Huiqiu Zhang, Liqiao Chen, Yingtang Zhou, Xiaoming Yu, Xuan Yu, Lu Cai, and Zhe Leng. 2019. "Role of LPSO Phase in Crack Propagation Behavior of an As-Cast Mg-Y-Zn Alloy Subjected to Dynamic Loadings" Materials 12, no. 3: 498. https://doi.org/10.3390/ma12030498

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Role of LPSO Phase in Crack Propagation Behavior of an As-Cast Mg-Y-Zn Alloy Subjected to Dynamic Loadings

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