Microstructure and mechanical properties of Mg–8Li–(1, 3)Al–(0, 1)Y alloys

Abstract

The microstructure and mechanical properties of Mg–8Li–(1, 3)Al–(0, 1)Y alloys were studied. Y refines and spheroidises the microstructures of alloys, and it causes the decrease in α phase percentage. Blocky AlY exists in α and β phases. When Al content is 3 wt-%, AlLi and MgLi₂Al form in β phase. The Al content solid soluted in the α phase appears larger than that in the β phase, while the Y content solid soluted in the α phase is less than that in the β phase. The addition of Al and Y brings about a combination of good strength and elongation for the Mg–8Li alloy.

Keywords:

• MAGNESIUM-LITHIUM ALLOY
• YTTRIUM
• ALUMINIUM
• MICROSTRUCTURE