Abstract
Acoustic emission (AE) is observed and analysed during tensile deformation of an AZ31 (Mg-3wt.%Al-1wt.%Zn) magnesium sheet in dependence on the strain rate and the direction of applied stress with respect to the crystallographic texture. The results are explained in terms of dislocation glide and deformation twinning as the main mechanisms controlling plastic deformation and related acoustic emission. Deformation twinning can enhance the material's ductility and increase the related acoustic emission due to dislocation glide by local reorientation of crystal lattice thereby activating fresh slip systems.

Key words
acoustic emission, tensile testing, twinning, magnesium sheet, AZ31

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