摘要
使用往复挤压(RE)方法改善铸造和粉末冶金(PM)法制备的铝基复合材料的力学性能。分别使用AA 6063铸件和AA 6061粉末作为基体,使用5%SiC(体积分数)颗粒作为增强相制备复合材料。挤压样品的硬度和晶粒尺寸随挤压道次的增加而降低,而韧性和延展性随挤压道次的增加而增加。由于挤压样品的拉伸强度降低,其伸长率增加。因此,往复挤压是一种改善金属基复合材料(MMC)力学性能的有效方法。
A reciprocating extrusion （RE） process was used to improve the mechanical properties of Al-based composite manufactured using cast and powder metallurgy （PM）. AA 6063 cast and AA 6061 powders were used as the matrix materials, and the matrix was reinforced by 5% SiC （volume fraction） particles. The hardness and grain size of extruded samples decrease with increasing the number of extrusion pass, while the toughness and ductility increase. As the tensile strength of the samples decreases, the elongation of the extruded samples increases. Consequently, reciprocating extrusion is an effective method for improving the mechanical properties of metal matrix composites （MMC）.
基金
the Scientific and Technological Research Council of Turkey(TUB?TAK)and Erciyes University for their financial support of the present study under project Nos.108M562 and FBD-09668,respectively
关键词
往复挤压
金属基复合材料
铝合金
力学性能
reciprocating extrusion
metal-matrix composites
aluminum alloy
mechanical properties
