SiC颗粒增强6013铝基复合材料时效析出行为及力学性能  

Aging Precipitation Behavior and Mechanical Properties of 6013 Al Matrix Composites Reinforced by SiC Particles

作　　者：傅定发[1] 彭克成 陈爽[1] 刘海洋 滕杰[1] 蒋福林[1] 张辉[1] FU Dingfa;PENG Kecheng;CHEN Shuang;LIU Haiyang;TENG Jie;JIANG Fulin;ZHANG Hui(College of Materials Science and Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2023年第6期137-143,共7页Journal of Hunan University:Natural Sciences

基　　金：湖南省高新技术产业科技创新引领计划(2022GK4051)。

摘　　要：采用球磨-冷等静压-热等静压-热挤压工艺制备组织均匀、颗粒分散良好的15%质量比SiC_(p)/6013Al复合材料,并利用扫描电子显微镜、透射电子显微镜和室温力学性能测试等研究不同人工时效温度下SiC_(p)/6013Al复合材料的析出行为和力学性能.结果表明,复合材料析出行为受热扩散控制,温度升高导致沉淀相析出加速;复合材料中的主要强化相为Mg_(2)Si,而且SiC颗粒能显著增强强度,但也导致复合材料的塑性快速下降;相比基体6013铝合金,15%质量比SiC_(p)/6013Al复合材料能在更低温度、更短时间内达到峰时效,经过人工时效处理后的最高硬度为180 HV_(0.2),抗拉强度为522 MPa.SiC_(p)/6013Al composites with a uniform structure and good particle dispersion were prepared by ball milling,cold isostatic pressing,hot isostatic pressing and hot extrusion process.Using transmission electron microscopy,scanning electron microscopy,and room temperature mechanical performance testing,the precipitation behavior and mechanical properties of 15%SiC_(p)/6013Al composites under different artificial aging temperatures after solution treatment were studied.The results show that the precipitation behavior of the composites is controlled by thermal diffusion,and the precipitation accelerates when the temperature increases.The main strengthening phase of the composites is Mg_(2)Si,while SiC particles can significantly enhance the strength of the composites,but also lead to a rapid decline in the plasticity of the composites.Compared with 6013 aluminum alloy matrix,15%SiC_(p)/6013Al composites can reach peak aging at a lower temperature and in a shorter time.After artificial aging treatment,the maximum hardness is 180 HV_(0.2) and the tensile strength is 522 MPa.

关 键 词：析出强化 力学性能 AL-MG-SI-CU合金 颗粒增强铝基复合材料 人工时效 

分 类 号：TG166.3[金属学及工艺—热处理]