中國有色金屬學(xué)報(bào)(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 20 No. 5 May 2010 |
casting, twin roll casting and hot compression
（1. School of Mechanical Engineering, University of Ji’nan, Ji’nan 250022, China;
2. School of Materials Science and Engineering, Shandong University, Ji’nan 250022, China;
3. Korea Institute of Materials Science, 66 Sangnam-dong, Changwon 641010, Korea）
Abstract:The microstructures of ZK60 alloy under conventional direct as-casting (DC), twin roll casting (TRC) and twin roll casting followed by hot compression (TRC-HC) were analyzed by optical morphology (OM), electron backscatter diffraction (EBSD) and X-ray diffraction (XRD). The deformation condition of hot compression is 350 ℃, 0.1 s−1. The microstructural evolution under TRC-HC deformation followed by annealing at different temperatures and time was discussed. The results show that TRC provides more modified microstructure compared with DC. Twins are found in TRC processing; dynamic recrystallization (DRX), shear bands and twins are found in TRC-HC. A short annealing time has little effect on hardness, while during a long time annealing, it is found that low annealing temperatures increase the micro-hardness and high temperature decreases it.
Key words: microstructural evolution; anneal; dynamic recrystallization; static recrystallization; twin-roll casting; hot compression; magnesium alloy ZK60
