Dynamic modeling of twin roll casting AZ41 magnesium alloy during
hot compression processing
hot compression processing
(1. School of Materials Science and Engineering, Shandong University, Ji’nan 250014, China;
2. School of Mechanical Engineering, University of Jinan, Ji’nan 250022, China;
3. Korea Institute of Materials Science, 66 Sangnam-dong, Changwon 641010, Korea)
2. School of Mechanical Engineering, University of Jinan, Ji’nan 250022, China;
3. Korea Institute of Materials Science, 66 Sangnam-dong, Changwon 641010, Korea)
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.
Key words: AZ41 alloy; flow stress; deformation behavior; dynamic model; twin-roll casting; hot compression