Differential Evolution Patterns and Behavior Mechanisms of Semi-solid Magnesium Alloys
Author of the article:WANG Ruiquan;QIU Jiafei;CHENG Qinhua;CHEN Yunxiang;HUANG Haijun
Author's Workplace：Department of Materials Technology, Zhejiang Institute of Mechanical and Electrical Engineering, Hangzhou 310053, China;School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China
Key Words：AM60B alloy grain refinement as-cast microstructure semisolid microstructure
Abstract：
The microstructural evolution of AM60B magnesium alloy refined by MgCO3 during 610 ℃ semi-solid isothermal heat treatment was studied. The results show that the semi-solid evolution mode of magnesium alloys varies greatly with the grain size of the original microstructure. The evolution of coarse grains includes five stages: the initial dendrites, dendrite consolidation, solute diffusion, grain bulk formation and spheroidization. For fine grains, a primitive fine equiaxed grain generally eventually forms a primary alpha grain.
