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10-05-2016 | Issue 6/2016

Journal of Materials Engineering and Performance 6/2016

Enhancing Thermal Conductivity of Mg-Sn Alloy Sheet by Cold Rolling and Aging

Journal:
Journal of Materials Engineering and Performance > Issue 6/2016
Authors:
Qiuyan Huang, Aitao Tang, Shida Ma, Hucheng Pan, Bo Song, Zhengyuan Gao, Muhammad Rashad, Fusheng Pan

Abstract

In present work, effect of cold rolling and aging on thermal conductivity (TC) of the as-extruded Mg-2Sn alloy was studied. Experimental results revealed that TC of as-extruded sheet decreases to value of ~105.4 W/m/K after 18% reduction rolling. TC increases with increase in aging time and regains the highest value of 126 W/m/K. Enhanced TC of cold-rolled Mg-Sn alloys is attributed to the defects annihilation, residual stress release, and precipitations. The more pronounced rolling reduction would induce more second-phase precipitations, and thus TC of the 18% rolled alloy is larger than that of 5% rolled alloys. Texture is also an important factor affecting thermal conductivity of Mg alloys, and double-peak texture is not beneficial for thermal transportation. The result would shed light on the novel design of highly conductive Mg sheet.

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