Study on the influences of different process temperatures on microstructural evolution of Mg-11%Al-2%Zn-1%Si alloy through isothermal semi-solid treatment

Abstract Due to the eutectic reaction, Mg 2 Si phase is inclined creating an unfavorable fishbone shape at low solidification rates. This can significantly degrade mechanical characteristics and become main barrier practical application of Mg-Si based alloy. It regarded that isothermal semi-solid treatment efficient technique modulate fishbone-shape phases in alloys. In this work, a new type Mg-11%Al-2%Zn-1%Si alloy successfully fabricated through treatment, influences different process temperatures on microstructural evolution are studied. The findings illustrate mean size α-Mg grains increases their trendency spheroidization becomes more evidently after held for 30 min from 550 °C 580 °C. Additionally, experimental totally changed original into polygon or granule shapes. With increasing temperatures, morphologies have no changes. morphological change theory also