Effects of Rolling Process on Microstructure and Properties of Mg-Gd-0.75Er-0.5Zn-0.18Zr Magnesium Alloy
Mg-Gd-0.75Er-0.5Zn-0.18Zr alloy was rolled by different rolling methods,and the alloy was annealed after rolling.The effect of different rolling process and annealing treatment on the microstructure and mechanical properties of the alloy was compared and analyzed.The results show that in the rolling state,the deformation grains account for the majority in the conventional rolling alloy,while the microstructure of the cross-rolled alloy plate is mostly fine and uniform equiaxed grains.In the conventional rolling,the second phase particles are distributed in a streamline shape along the rolling direction,while the second phase particles are more evenly distributed and dispersed in the cross rolling alloy.The tensile strength and elongation of the cross rolling are better than those of the conventional rolling.After annealing at 500℃for 30 min,the deformation microstructure formed in the rolling process of the two alloys basically disappears,and the distribution form and composition of the second phase in the alloy do not change significantly.The tensile strength of the two alloys decreases,but the elongation increases significantly.The performance of the cross-rolled alloy plate is still higher than that of the conventional rolled alloy plate.
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