Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 20    No. 5    May 2010

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Microstructure comparison of ZK60 alloy under
casting, twin roll casting and hot compression
WANG Shou-ren(王守仁)1, WANG Min(王 敏)2, KANG Suk-bong3, CHO Jae-hyung3

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

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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