Microstructure comparison of ZK60 alloy under casting, twin roll casting and hot compression |
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| Authors: | WANG Shou-ren WANG Min KANG Suk-bong CHO Jae-hyung |
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| Affiliation: | WANG Shou-ren1,WANG Min2,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,3.Korea Institute of Materials Science,66 Sangnam-dong,Changwon 641010,Korea |
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| 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. |
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| Keywords: | microstructural evolution anneal dynamic recrystallization static recrystallization twin-roll casting hot compression magnesium alloy ZK60 |
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