Optimization of process parameter for superplastic forming of al7075 sicp composites

Abstract

The rapid development leads to a variety of complex shapes in the newlinemanufacturing in the field of aerospace, automobile, architecture industries and newlinemedical applications with high quality with minimum cost. In this virtue, the newlinesuperplastic forming plays an imperative role in the production of complex newlineshapes in the aluminium alloys. The superplastic formation exhibits newlinepolycrystalline in an isotropic manner the near net shape components newlineproduction with high tensile elongations. The superplastic forming is a long newlineneck free elongation under low flow stresses. In the superplastic forming newlineprocess more than 300 percentage of elongation was obtained. Therefore harder newlinematerials can be formed through superplastic forming newlineThe Superplastic forming has the advantage over conventional farming newlinetechniques due to its low die cost, superior design flexibility and form complex newlineshapes. The only disadvantage of superplastic forming is the low production newlinerate due to its forming time. By finding the optimum forming conditions, the newlineproductivity will be increased. The properties of Aluminium Metal Matrix newlinecomposites are high specific strength and stiffness, low thermal expansion newlinecoefficient, improved tribological properties and better high-temperature newlinestrength. In this current research work, the composites were prepared by the stir newlinecasting process. newlineThe aluminium7075 alloy, as the matrix was used for the production of newlinemetal matrix composites and SiC particles as reinforcement. The composites newlinewere prepared with 5%, 7.5% and 10% volumetric percentages of SiC particles. newlineBy thermomechanical treatment, the grains were refined and the defects in newlinecasting were removed. Hot rolling process made on the cast component with newlinevii newlineintermittent heating, newlineDuring thermomechanical treatment, the equiaxed grains were formed and the newlineSiC particles were redistributed along with the matrix. newlineThe equiaxed grains will improve flammability characteristics. The caste newlinecomponent has a thickness of 5 mm and after the rolling process, it was newlinereduced to 2.5 mm. The mechanical