反复塑性变形法制备SiCp/AZ31镁基复合材料

Preparation of SiCp/AZ31 Magnesium Matrix Composites by Repeated Plastic Working

采用反复塑性变形(RPW)技术,再结合挤压工艺可制备出SiC颗粒增强AZ31镁基复合材料,RPW次数和SiC颗粒的加入量对SiCP/AZ31镁基复合材料显微组织和性能的影响也得到了研究。研究结果表明,随着RPW次数的增加,SiC颗粒逐渐被细化并最终在基体中弥散分布,在RPW为300次时的力学性能最佳;随着SiC颗粒加入量的增加,其室温抗拉强度和硬度都逐渐增大,在SiC颗粒体积分数为6%时达到最大值,分别为371MPa和112。

SiC particulate reinforced magnesium matrix composites SiCP / AZ31 were prepared by repeated plastic working（RPW） together with hot extrusion.The effects of cycling s times（times of RPW） and the quantity of SiC particulate on structure and properties of SiCp/AZ31 magnesium matrix composites have been investigated.The results show that：With the increase of RPW,the SiC particulate can be refined grain gradually,and be distributed uniformly in base finally.When RPW=300,mechanics of the ally is the best. With the increase of SiCp, the ensile strength and hardness of the composite rise gradually. They reach to or approach to maximum value with the amount of SiCp is 6%（Vol%）, and the peak values are 371MPa and 112.