【摘要】 为了研究正挤压加工对SiCw/6061Al复合材料晶须形貌的影响规律,通过改变挤压温度、挤压比等工艺条件正挤压成形了挤压铸造法制备的15vol.%SiCw/6061Al复合材料,利用SEM技术观察和分析了正挤压加工前后复合材料的微观组织形貌.研究表明:正挤压加工导致SiC晶须沿着复合材料的塑性流动方向呈现出一定程度的定向排列趋势,并伴随有比较明显的折断现象;挤压温度、挤压比等工艺参数都是影响SiC晶须形貌的主要因素.更多还原

【Abstract】 To analyze the effect low of forward extrusion on the whisker morphology of 6061 Al matrix composite reinforced by 15 vol. % SiC whisker fabricated by squeeze casting technique, the SEM micrographs of the deformed components are presented and discussed. The results show that the forward extrusion induces the rupture and the o-riented arrangement of the SiC whisker along the direction of material plastic flow. The extrusion temperature and the extrusion ratio etc. are all important factors of the SiC whisker morphology of the final components.更多还原