轧制加工对7075/SiCp复合材料组织性能的影响  

Effects of Rolling on the Microstructure and Properties of 7075/SiCp Composite

作　　者：袁武华[1] 杨寿智[1] 陈振华[1] 张福全[1] 李英芝[1] 张召春[1] 

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：《矿冶工程》2005年第2期62-65,共4页Mining and Metallurgical Engineering

基　　金：国家十五攻关项目;;湖南省科技厅重点项目(02Gky2004)

摘　　要：对喷射共沉积7075/SiCp复合材料坯经过挤压和轧制后的板材微观组织和力学性能进行了测试和分析。经过挤压和轧制后,SiC颗粒的分布沿金属塑性流动方向有明显的取向变化,在轧制过程中SiC颗粒的破碎明显。复合材料轧制板材峰时效的强度和延伸率与挤压板材峰时效状态相比有一定程度的提高。分析表明,7075/SiCp复合材料挤压板材拉伸断裂主要是由SiC颗粒的拔出和断裂引起的,而复合材料轧制板材的断裂主要是由SiC颗粒的拔出和基体断裂所引起。The microstructure and mechanical properties of the extruded and rolled plates of spray co-deposited 7075/SiCp composites were tested and analyzed. After the composite's being extruded and rolled, the SiC particles distributed along the direction of the metal plastic flow. The size of the particles reduced markedly in the rolling process. The peak ageing strength and elongation value of the rolled composite were higher than those of the extruded composite. The fractographies show that the tensile fracture is resulted from Al/SiC interfacial debonding and SiC particles' fracture for the extruded composite, but from Al/SiC interfacial debonding and matrix failure for the rolled composite.

关 键 词：铝基复合材料 轧制 挤压 喷射沉积 快速凝固 

分 类 号：TG146.2[一般工业技术—材料科学与工程]