Study of Cyclic Constrained Groove Pressing Factors on Hardness Behavior of Al/Sic - MMC Subjected to Severe Plastic Deformation

摘要

Cyclic constrained groove pressing (CCGP) are widely used for the production of an ultra finegrained, Nano/sub microcrystalline structure in industries to compensate the high strength metal plates components used in automobiles. The present paper focus on The mechanical properties in nanostructure Al/Sic composite plate processed by a new technique, cyclic constrained groove pressing (CCGP), were studied using micro hardness tester. Taguchi technique and the analysis of variance (ANOVA) techniques were carried out to investigate the degree of importance of CCGP process parameters i.e. Percentage of Sic, strain rate, number of passes, plate thickness and heat treatment for four different levels. The results indicated that the percentage of Sic factor has a major influence on the hardness of the composite plate, followed by no. of passes, Heat treatment, plate thickness and strain rate. The Taguchi method and the ANOVA technique was an effective tool to predict the degree of importance of the CCGP parameters on micro hardness CGP specimens.