Mechanical properties of Al-Si17Cu3.5Mg0.8 alloy fabricated by stir casting with UV and new CRSS casting process with and without T6 condition

Abstract

Aluminum-Silicon metal matrix composites are the popular materials in the vast majority of the car and modern industries on account of their low weight, high mechanical properties, and incredible wear opposition properties. In the present study, Al-Si17Cu3.5Mg0.8 alloy is fabricated by two casting processes such as stir casting with ultrasonic vibrations (RSC) and merged-rheo-stir-squeeze (CRSS) casting with and without heat treated (T6) condition. Microstructural and material characterization was explored by advanced metallurgical microscope (AMM), SEM and EDS. Though, tensile and hardness tests were executed by Tensometer and hardness tester (Brinell). The casting process (CRSS) greatly improves the mechanical properties than rheo stir casting about 30%. The micrograph results display uniform distribution of Si-particles in CRSS cast workpieces than the regular casting. Furthermore, mechanical values revealed that the addition of heat treatment (T6) process led to the development of hardness and tensile strength.

Keywords: Al-Si alloy; Stir casting; Squeeze casting; EDS; SEM; Tensometer;