Microstructure comparison of ZK60 alloy undercasting, twin roll casting and hot compression

来源期刊：中国有色金属学报(英文版)2010年第5期

论文作者：王守仁 王敏 KANG Suk-bong CHO Jae-hyung

文章页码：763 - 768

Key words：microstructural evolution; anneal; dynamic recrystallization; static recrystallization; twin-roll casting; hot compression; magnesium alloy ZK60

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.

基金信息：supported by the Korean Ministry of Commerce, Industry and Energy
supported by the Natural Science Foundation of Shandong Province, China