The effects of solutionizing temperatures on microstructures of as-received A357 alloy

Abstract

Solution treatment has been carried out on as-received A357 alloy at two solution treatment temperatures of 530ºC and 550ºC for 11 hours. The microstructural study was performed by using optical microscope. Optical microstructure study of alloy revealed that the increase in solutionizing temperature has improved the distribution of α-Al dendrites and eutectic silicon (Si) particles. In addition, eutectic Si particles also were found to change to spheroidised and increasing in size with the increasing in solutionizing temperature.