【作者】 王晓军； 张海峰； 吴昆； 胡小石； 郑明毅；

【Author】 Wang Xiaojun,Zhang Haifeng,Wu Kun,Hu xiaoshi,Zheng Mingyi (School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001)

【机构】 哈尔滨工业大学材料科学与工程学院；

【摘要】 研究了在不同温度、挤压比为12下热挤压变形对SiCp/AZ91镁基复合材料组织及性能的影响。研究结果表明,SiCp/AZ91复合材料经热挤压后,其力学性能有很大提高。主要原因是挤压变形能消除铸造缺陷,增强SiCp与镁合金基体的界面结合,提高增强体分布的均匀性。同时,随着挤压温度的提高,复合材料的屈服强度、抗拉强度和延伸率单调增加。更多还原

【Abstract】 Effects of extrusion deformation on microstructure and properties of SiCp/AZ91 were investigated at R12 with different extrusion temperatures.The results showed that the mechanical properties of SiCp/AZ91 composite are enhanced greatly after hot extrusion.Reason for this is that casting flaws are eliminated,boundary strength between SiC particles and Mg alloy matrix is enhanced,and that uniformity of reinforced particle distribution is improved after the composite is extruded.Under the same extrusion ratio,mechanical properties of the composites increase gradually with the increasing extrusion temperature.更多还原