Effect of RE element Y on microstructure and mechanical properties of as-cast magnesium alloy

doi:10.13251/j.issn.0254-6051.2020.10.033

Abstract

Abstract: Mg-2.0Zn-0.2Ca and Mg-2.0Zn-0.2Ca-2Y alloys were prepared by melting. The as-cast microstructure and mechanical properties of the two alloys were investigated. The results show that the as-cast microstructure of Mg-2.0Zn-0.2Ca can be refined by addition of Y element. Mg-2.0Zn-0.2Ca alloy is mainly composed of α-Mg and a small amount of Mg₇Zn₃. The solid solubility of Zn in Mg matrix decreases with the addition of 2wt% Y, which reduces the effect of solid solution strengthening. At the same time, I phase and W phase form in the alloy. With the addition of Y, the yield strength of the alloy increases from 41.0 MPa to 50.6 MPa and the elongation decreases from 12.6% to 4.0%.

Key words: Mg alloy, Y element, as-cast microstructure, mechanical properties

CLC Number:

TB333

Zhang Xudong, Suo Zhuanxia, Wei Boxin, Wang Xin, Cao Guojian. Effect of RE element Y on microstructure and mechanical properties of as-cast magnesium alloy[J]. Heat Treatment of Metals, 2020, 45(10): 171-174.

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