Dynamic modeling of twin roll casting AZ41 magnesium alloy during hot compression processing

来源期刊：中国有色金属学报(英文版)2010年增刊第2期

论文作者：王敏 王守仁 S. B. KANG J. H. CHO 王砚军

文章页码：513 - 518

Key words：AZ41 alloy; flow stress; deformation behavior; dynamic model; twin-roll casting; hot compression

Abstract: A dynamic material model of Mg-4.51Al-1.19Zn-0.5Mn-0.5Ca (AZ41, mass fraction, %) magnesium alloy was put forward. The results show that the dynamic material model can characterize the deformation behavior and microstructure evolution and describe the relations among flow stress, strain, strain rates and deformation temperatures. Statistical analysis shows the validity of the proposed model. The model predicts that lower deformation temperature and higher strain rate cause the sharp strain hardening. Meanwhile, the flow stress curve turns into a steady state at high temperature and lower strain rate. The moderate temperature of 350 ℃ and strain rate of 0.01 s^-1 are appropriate to this alloy.