| 冷压缩和冷锻AZ31镁合金的组织演变和静态再结晶动力学研究 |
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| 引用本文： | 刘宇,刘天模.冷压缩和冷锻AZ31镁合金的组织演变和静态再结晶动力学研究[J].材料导报,2009,23(Z2). |
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| 作者姓名： | 刘宇 刘天模 |
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| 作者单位： | 1. 中国核动力院核燃料及材料国家重点实验室,成都610041;重庆大学镁合金材料国家工程中心,重庆400045
2. 重庆大学镁合金材料国家工程中心,重庆,400045 |
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| 摘 要： | 对AZ31镁合金进行了冷锻和冷压缩变形,并研究了其在此过程中的组织演变和再结晶动力学.实验结果表明,再结晶分数与退火时间之间的关系可以用JMAK等式采描述.根据动力学分析,可以计算出冷锻和冷压缩的再结晶激活能分别为53.5kJ/mol和85.1kJ/mol.冷压缩处理后的AZ31镁合金的再结晶激活能高于冷锻变形的,这主要与冷锻变形提供了更多的形核点有关.
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| 关 键 词： | 镁合金 再结晶 再结晶激活能 |
An Investigation on the Microstructure Evolution and Static Recrystallization Kinetics of Cold Compression and Cold Forging AZ31 Mg Alloy |
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| LIU Yu,LIU Tianmo.An Investigation on the Microstructure Evolution and Static Recrystallization Kinetics of Cold Compression and Cold Forging AZ31 Mg Alloy[J].Materials Review,2009,23(Z2). |
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| Authors: | LIU Yu LIU Tianmo |
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| Abstract: | Cold forging and cold compression process are made to the AZ31 magnesium alloy,and the microstructure evolution and kinetics of static recrystallization during annealing process of cold forging and cold compression samples are investigate. The experiment results demonstrate that the relationship between the annealing time and the fraction of recrystallization grains can be described by the JMAK equation. Based on the kinetics analysis, the activation energy of recrystallization is calculated to be about 53. 5kJ/mol and 85. 1kJ/mol respectively. The activation energy of cold compression process is higher than that of the cold forging process, because more nucleation sites are supplied in the cold forging process. |
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| Keywords: | magnesium alloys recrystallization recrystal activation energy |
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