Investigation of the Plastic Deformation Mechanism and Twinning of Magnesium Alloys

The plastic deformation mechanisms are reviewed.The two typical deformation twin modes for magnesium alloys and their analysis technologies are described.The influences of temperature,strain rate,stress and grain size on twinning are analyzed.The influences of twinning on plastic deformation,dynamic recrystallization,mechanical properties and fracture are discussed.Twinning usually occurs in coarse grains.Therefore,it is suggested that non-basal slips be activated for fine-grained Mg alloys,resulting in suppression of twin generation and reduction in mechanical anisotropy.Grain refinement is a promising direction for wrought magnesium alloys and their industrial application.