的微观组织及界面结构
(哈尔滨工业大学威海分校, 威海 264209
哈尔滨工业大学金属精密热加工国防科技重点实验室, 哈尔滨 150001)
摘 要: 采用喷射沉积工艺制备了Al-5.5Cu/TiAl3自生复合材料, 并对该材料的微观组织及界面结构进行了研究。 观察表明TiAl3与α-Al基体之间存在(020)Al//(002)TiAl3, [001]Al//[110]TiAl3的位向关系, 力学性能测试结果表明喷射沉积Al-5.5Cu/TiAl3自生复合材料的抗拉强度较铸态的抗拉强度提高约12%, 延伸率提高450%, 耐磨性则提高150%。
关键字: Al基自生复合材料 微观组织 界面结构 喷射沉积
Al-5.5Cu/TiAl3 IN SITU COMPOSITES PRODUCED
BY SPRAY DEPOSITION
(Weihai branch, Harbin Institute of Technology, Weihai 264209, P. R. China
National Defense S and T key Lab of Metal Precision Hot Working, Harbin Institute of Technology, Harbin 150001, P. R. China)
Abstract:Al-5.5Cu/TiAl3 in situ composites was produced by spray deposition, and the microstructure and interfacial structure of the materials were analyzed. The observation show that the orientation relationship between TiAl3 and α-Al is [001]Al//[1-10]TiAl3, (020)Al//(002)TiAl3. The mechanical properties of the materials were tested. The results show that the tensile strength of the materials produced by spray deposition is 112% of that produced by cast and the elongation isincreased to 550%, and the wear resistance is increased to about 250%.
Key words: microstructure interfacial structure Al-based composites spray deposition