Searching for the superior solution to the population-based optimization problem: Processing of the wear resistant commercial AA6061 AMCs

摘要

In this present work, stir casting technique was used to fabricate aluminum matrix composites with varying weight percentages of SiC (5, 10 and 15) reinforcements. The proper selection of process parameter such as pouring temperature, stirring speed, stirring time and pre-heat temperature of reinforcement can all influence the quality of the fabricated composites. The porosity level of composite should be minimized and the chemical reaction between reinforcement and matrix should be avoided. Optimization is an applied science which explores the best values of the parameters of a problem that may take under specified conditions. The execution of an optimized stir casting technique yields relatively homogenous and fine microstructure which improves the addition of reinforcement material in the molten metal. The influence of SiC content, SiC size and secondary mechanical processing with different rolling reductions on the dry sliding wear characteristics of Al matrix composites has been assessed using a pin-on-disc wear test. The porosity and hardness of the resultant composites were also examined.