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International Journal of Modern Physics and Application

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Refined Microstructure and Enhanced Mechanical Properties of Mg-6Al-0.5Ca-0.5Mn Alloy by Sn Addition

International Journal of Modern Physics and Application
Vol.5 , No. 3, Publication Date: May 11, 2018, Page: 21-26

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Authors

[1]	Fang Da-qing, College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, China.
[2]	Luo Xiao-ping, College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, China.

Abstract

The effects of tin on microstructure and mechanical properties of as-cast Mg-6Al-0.5Ca-0.5Mn alloy are investigated. The addition of 3.0 wt% tin leads to a significant grain refinement of Mg-6Al-0.5Ca-0.5Mn alloys owing to the formation of dispersed distribution of Mg₂Sn phases that inhibited the formation of β-Mg₁₇Al₁₂ phase. Few Al₂Ca and Al₈Mn₅ phases are found. Furthermore, the Mg-6Al-0.5Ca-0.5Mn-3Sn alloy exhibits the best combined mechanical properties at ambient temperature, and the ultimate tensile strength, yield strength, and elongation are 222MPa, 145 MPa, and 14.31%, respectively. These results are attributed to the grain refinement and precipitation strengthening of the Mg₂Sn phases.

Keywords

Magnesium Alloy, Tin, Microstructure, Mechanical Properties

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