Abstract
The processes of heat treatment and subsequent hot rolling were carried on duplex-phase Mg-8Li-6Y-2Zn alloy to improve the electromagnetic interference (EMI) shielding effectiveness (SE) of the alloy. The microstructure and EMI SE of the alloy under different states were researched. The results show that, after heat treatment, a larger area fraction of second phase, LPSO phase, increases the multiple internal reflections of EM waves. The fine LPSO phases in the subsequent hot rolling can facilitate dynamically recrystallized grains refinement. Meanwhile, the hot rolling improves the electrical conductivity of the alloy. The increase of interfaces and electrical conductivity are both beneficial to improve the EMI SE of the alloy. The combination of heat treatment and hot rolling can provide an efficient strategy for improving the EMI SE of Mg-8Li-6Y-2Zn alloy.
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