(1. 中国兵器工业第五九研究所，重庆 400039；
2. 哈尔滨工业大学 材料科学与工程学院，哈尔滨 150001)
摘 要: 在半固态金属加工技术的基础上，提出伪半固态触变成形工艺。对该工艺制备的Al/Al2O3复合材料杯形件进行扫描电镜观察、抗弯强度以及断裂韧性测量。结果表明：伪半固态触变成形的制件具有三维连通的网状结构，界面结合紧密，37%Al/Al2O3(体积分数)复合材料杯形件抗弯强度为570~690 MPa，断裂韧性为8.5~16.8 MPa·m1/2，与其他成形工艺相比，力学性能有所提高；成形温度及压力、金属相体积分数对力学性能具有较大的影响。
关键字: Al/Al2O3复合材料；伪半固态触变成形；力学性能；杯形件
state and toughening-strengthening
（1. No.59 Research Institute of China Ordnance Industry, Chongqing 400039, China;
2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China）
Abstract:The thixoforming in pseudo-semi-solid state based on the semi-solid metal forming was proposed. The microstructure of the prepared Al/Al2O3 composite cup shell was observed by SEM, and bend strength and fracture toughness of this alloy were measured. The results show that the cup shell is of three-dimensional network structure and closely bounded interfaces. The bend strength and fracture toughness of 37% Al/Al2O3 (volume fraction) are about 570−690 MPa and 8.5−16.8 MPa·m1/2 respectively. The mechanical properties of the cup shell by this technology are improved compared with other forming technologies. The forming temperature, force and volume fraction of metal phase have great influence on mechanical properties.
Key words: Al/Al2O3 composite; thixoforming in pseudo-semi-solid state; mechanical property; cup shell
