Effect of deformation twin on toughness in magnesium binary alloys

摘要

The impact of alloying elements on toughness was investigated using eight kinds of Mg-0.3at.% X (X=Al, Ag, Ca, Gd, Mn, Pb, Y and Zn) binary alloys with meso-grained structures. These binary alloys had an average grain size of approximately 20 mu m. The fracture toughness and crack propagation behaviour were influenced by the alloying elements; the Mg-Ag and Mg-Pb alloys had the highest and the lowest toughness amongst the alloys, respectively, irrespective of presence in their