Analysis of Microstructure and Mechanical Properties of AZ61M-Cu Alloy under Large Deformation Extrusion
The microstructure and mechanical properties of AZ61M and AZ61M+1.0Cu alloys were tested by homogenization treatment and composite extrusion shear treatment by two-step method,and the changes of microstructure and mechanical properties caused by Cu addition were compared.The results show that the grain size of AZ61M+1.0Cu alloy is 1.4 μm,and the small grain boundaries are mainly distributed in the DRX grains in the range of 0.5～1.0 μm.After hot extrusion shear treatment,dislocation recovery occurs in the alloy structure,and the original dislocation cells are transformed into DRX grains.The mechanical strength of AZ61M+1.0Cu alloy is higher than that of AZ61M alloy,and the change of elongation is not obvious.The research is helpful to improve the forming quality of magnesium alloy and lay a theoretical foundation for the subsequent extrusion process optimization.
large deformation extrusionmagnesium alloymicroorganizationmechanical properties
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