Abstract
Plastic behaviour of α-phase binary Mg alloys containing Al, In, Li, Sn or Zr was investigated at temperatures between 77 and 573K. Addition of In, Sn, Al and Zr increased yield stress of these binary alloys, while Mg-4%Li alloy was softened by Li addition at room temperature. Mg-4%Al and Mg-4%Li alloys showed good ductility but no significant improvement in ductility was observed in other alloys. Activation of deformation twins which was observed by characterizing the acoustic emission signals during tensile test was responsible for good ductility of Mg-4%Al alloy, while addition of Li activated the non-basal slip resulting in improving ductility of Mg-4%Li alloy at room temperature.