Simulation of microstructure evolution of die cast AM60 Mg alloy considering externally solidified crystals in shot sleeve
The externally solidified crystals (ESCs) In the shot sleeve have a significant influence on the final microstructure and performance of magnesium alloy during cold-chamber high pressure die casting (HPDC) process. In the present paper, a cellular automaton model was developed to simulate the crystal growth of magnesium alloy with hep crystal structure. Simulation of dendritic growth with different growth orientations was achieved. Special attention was paid to establish a nucleation model considering the externally solidified crystals In the shot sleeve. To validate the nucleation and growth model, simulations were carried out to predict the microstructure of cover-plate die castings of AM60 magnesium alloy at different process parameters. It was found that the simulated results were consistent with the experimental results with CFD.
magnesium alloy high pressure die casting externally solidified crystals microstructure simulation
Wu Meng wu Xiong Shoumei
Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China State Key Laboratory of Automobile Safety and Energy, Tsinghua University, Beijing 100084, China
国际会议
The 11th Asian Foundry Congress(第11届亚洲铸造会议 AFC-11)
广州
英文
1-7
2011-11-12（万方平台首次上网日期，不代表论文的发表时间）