Ce对Al-15%Mg_2Si复合材料组织和性能的影响  

Influence of Ce on microstructures and properties of Al-15%Mg_2Si composite

作　　者：任玉艳[1] 胡皓[1] 李英民[1] 陈圣元 

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870

出　　处：《沈阳工业大学学报》2018年第1期30-36,共7页Journal of Shenyang University of Technology

基　　金：沈阳市科技计划资助项目(F15-199-1-11)

摘　　要：为了研究Ce元素对Al-15%Mg_2Si复合材料微观组织和力学性能的影响,利用原位内生工艺制备了Al-15%Mg_2Si复合材料,并加入不同质量分数的Ce元素对复合材料进行细化变质.利用扫描电子显微镜进行微观组织观察,利用布氏硬度计和液压万能试验机进行力学性能测试.结果表明,添加Ce元素后Mg_2Si相以块状和粒状形态存在于Al基体中,随着Ce元素质量分数的增加,初生Mg_2Si相得到细化,其力学性能呈现先增大后减小的趋势.当Ce元素的质量分数为0.6%时,初生Mg_2Si相的细化效果最好,其力学性能最佳.In order to study the effect of Ce element on the microstructures and mechanical properties of Al-15% Mg2Si composite,the Al-15%Mg2Si composite was prepared with in-situ formation technology,and the Ce element with different mass fractions was added to refine and modify the composite. In addition,the microstructures were observed with scanning electron microscope（ SEM）,and the mechanical properties were tested with the Brinell hardness and hydraulic universal testers. The results showthat after adding Ce element,the Mg2Si phase with the massive and granular morphologies exists in the Al matrix. With increasing the mass fraction of Ce element,the primary Mg2Si phase gets refined,and the mechanical properties of the composite firstly increase and then decrease. When the mass fraction of Ce element is 0. 6%,the refinement effect of primary Mg2Si phase is best and the mechanical properties of the composite are optimal.

关 键 词：Al-15%Mg2Si复合材料 原位内生 Ce元素 微观组织 抗拉强度 硬度 伸长率 细化机制 

分 类 号：TB331[一般工业技术—材料科学与工程]