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The mechanical behaviour of AZ31 magnesium alloy sheet with the extrusion joint(EJ) was evaluated.Extruded joint of AZ31 alloy sheets was obtained by the hot extrusion process. Tensile tests were carried out along the extrusion direction at room temperature, and both the non-uniform plastic deformation and the fracture behaviour were studied. It is found that the samples with EJ present significantly deteriorated mechanical properties compared with the EJfree counterpart. Inhomogeneous microstructure distribution around EJ zone brings in the uncoordinated deformation due to the high density of f10“12g twins which were readily activated during plastic deformation.
The mechanical behavior of AZ31 magnesium alloy sheet with the extrusion joint (EJ) was evaluated. Extruded joint of AZ31 alloy sheets was obtained by the hot extrusion process. Tensile tests were carried out along the extrusion direction at room temperature, and both the non- uniform plastic deformation and the fracture behavior were studied. It is found that the samples with EJ present significantly deteriorated mechanical properties compared with the EJfree counterpart. Inhomogeneous microstructure distribution around EJ zone brings in the uncoordinated deformation due to the high density of f10 ”12g twins which were readily activated during plastic deformation.