Effects of Y Content on the Microstructures and Mechanical Properties of Mg-5Zn-xY-0.6Zr Alloys

Siqi Yin; Zhiqiang Zhang; Xuan Liu; Zhenjia Zhu; Lei Bao; Qichi Le; Jianzhong Cui

doi:10.1007/s11595-019-2027-9

Journal of Wuhan University of Technology Materials Science Edition ›› 2019, Vol. 34 ›› Issue (1) : 138 -144. DOI: 10.1007/s11595-019-2027-9

Metallic Materials

Effects of Y Content on the Microstructures and Mechanical Properties of Mg-5Zn-xY-0.6Zr Alloys

Siqi Yin ¹^,²
, Zhiqiang Zhang ¹^,²^,^{^b}
, Xuan Liu ¹^,²
, Zhenjia Zhu ¹^,²
, Lei Bao ¹^,²
, Qichi Le ¹^,²
, Jianzhong Cui ¹^,²

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Abstract

Three as-cast and as-extruded Mg-5Zn-xY-0.6Zr (x=5 wt%, 8 wt%, 11 wt%) alloys were prepared, and the effects of Y content on the microstructures and mechanical properties of the alloys were investigated. The results show that the investigated Mg-Zn-Y-Zr alloys mainly consist of α-Mg, X-Mg₁₂YZn and minor amount of W-Mg₃Y₂Zn₃ phases. The volume fraction of X-Mg₁₂YZn phase increases and that of W-Mg₃Y₂Zn₃ phase decreases with the rising of Y content in the alloys. The as-extruded Mg-5Zn-11Y-0.6Zr alloy owns the optimal ultimate tensile strength and yield strength of 429 and 351 MPa, respectively. Mg-5Zn-5Y-0.6Zr alloy owns the maximum elongation of 13.6%.

Keywords

Mg-Zn-Y-Zr alloy / indirect extrusion / ternary phase / mechanical property

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Siqi Yin, Zhiqiang Zhang, Xuan Liu, Zhenjia Zhu, Lei Bao, Qichi Le, Jianzhong Cui. Effects of Y Content on the Microstructures and Mechanical Properties of Mg-5Zn-xY-0.6Zr Alloys. Journal of Wuhan University of Technology Materials Science Edition, 2019, 34(1): 138-144 DOI:10.1007/s11595-019-2027-9

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