| 挤压态AZ80镁合金的热变形行为 |
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| 引用本文： | 李慧中,卫晓燕,欧阳杰,姜俊,李轶. 挤压态AZ80镁合金的热变形行为[J]. 中国有色金属学会会刊, 2013, 23(11): 3180-3185. DOI: 10.1016/S1003-6326(13)62850-2 |
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| 作者姓名： | 李慧中 卫晓燕 欧阳杰 姜俊 李轶 |
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| 作者单位： | [1]中南大学材料科学与工程学院,长沙410083 [2]中南大学粉末冶金国家重点实验室,长沙410083 [3]中南大学有色金属材料科学与工程教育部重点实验室,长沙410083 |
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| 摘 要： | 通过热压缩实验，研究挤压态AZ80镁合金在变形温度为250-450℃，应变速率为0.001-10 s-1条件下的热变形行为。采用经过温升修正的流变应力计算该合金的Zener-Hollomon参数（Z参数）。结果表明，挤压态AZ80镁合金适宜的变形条件为应变速率0.1 s-1、变形温度350-400℃。另外，讨论了显微组织演化与Z参数之间的关系。在高温及低应变速率（低Z参数）时，合金发生了完全再结晶并产生了大的再结晶晶粒。综合考虑加工图和显微组织，变形温度400℃、应变速率0.1 s-1是合金适宜的热变形条件。
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| 关 键 词： | AZ80镁合金 热变形 加工图 Z参数 |
| 收稿时间： | 2013-01-24 |
Hot deformation behavior of extruded AZ80 magnesium alloy |
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| Hui-zhong LI,Xiao-yan WEI,Jie OUYANG,Jun JIANG,Yi LI. Hot deformation behavior of extruded AZ80 magnesium alloy[J]. Transactions of Nonferrous Metals Society of China, 2013, 23(11): 3180-3185. DOI: 10.1016/S1003-6326(13)62850-2 |
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| Authors: | Hui-zhong LI Xiao-yan WEI Jie OUYANG Jun JIANG Yi LI |
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| Affiliation: | 1. School of Materials Science and Engineering, Central South University, Changsha 410083, China; 2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China; 3. Key Laboratory of Nonferrous Metal Materials Science and Engineering of Ministry of Education, Central South University, Changsha 410083, China |
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| Abstract: | The hot deformation behavior of extruded AZ80 magnesium alloy was studied through hot compression tests performed at temperatures ranging from 250 to 450 ~C with strain rates varying from 0.001 to 10 s-1. The flow stress was corrected due to the deformation heating. The Zener-Hollomon parameter （Z parameter） and processing map were established to describe the hot deformation behavior. The results indicate that the applicable deformation should be conducted at the strain rate of 0.1 s-~ and the temperature range of 350-400 ~C. Besides, the relationship between the microstructure evolution and Z parameter was also discussed. High temperature and low strain rate result in a low Z parameter, which leads to full dynamic recrystallization （DRX） and large DRX grain size in the microstructure. Considering processing map and microstructure, the hot deformation should be carried out at the temperature of 400 ~C and the strain rate of 0.1 s 1. |
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| Keywords: | AZ80 magnesium alloys hot deformation processing map Z parameter |
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