| Processing map for hot working of as extruded AZ31B magnesium alloy |
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| 作者姓名： | 黄光胜 黄光杰 汪凌云 潘复生 |
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| 作者单位： | College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | The deformation behavior of AZ31B magnesium alloy as extruded under hot compression conditions was characterized in the temperature range of 200 - 400 ℃ and strain rate range of 0. 001 - 1 s^-1. The processing maps were obtained at different strains. The results show that the map exhibits flow instabilities as two domains. The domain at beyond 300 ℃ and strain rate of 1 s^-1 appears with a peak efficiency of power dissipation about 56% occurring. This domain is expected to happen in a hot process, such as hot rolling, hot extrusion and hot forging. There is high efficiency of power dissipation at temperature beyond 350 ℃ and strain rate 0. 001 s^-1. Such domains suggest the occurrence of superplastic deformation.
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| 关 键 词： | AZ31B 镁合金 挤压工艺 金属加工 过程管理 热挤压 |
| 文章编号： | 1003-6326（2005）04-0813-05 |
| 收稿时间： | 2004-11-05 |
| 修稿时间： | 2005-01-24 |
Processing map for hot working of as extruded AZ31B magnesium alloy |
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| HUANG Guang-sheng,HUANG Guang-jie,WANG Ling-yun,PAN Fu-sheng.Processing map for hot working of as extruded AZ31B magnesium alloy[J].Transactions of Nonferrous Metals Society of China,2005,15(4):813-817. |
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| Authors: | HUANG Guang-sheng HUANG Guang-jie WANG Ling-yun PAN Fu-sheng |
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| Abstract: | The deformation behavior of AZ31B magnesium alloy as extruded under hot compression conditions was characterized in the temperature range of 200 - 400 ℃ and strain rate range of 0. 001 - 1 s-1. The processing maps were obtained at different strains. The results show that the map exhibits flow instabilities as two domains. The domain at beyond 300 ℃ and strain rate of 1 s-1 appears with a peak efficiency of power dissipation about 56% occurring. This domain is expected to happen in a hot process, such as hot rolling, hot extrusion and hot forging. There is high efficiency of power dissipation at temperature beyond 350 ℃ and strain rate 0. 001 s-1. Such domains suggest the occurrence of superplastic deformation. |
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| Keywords: | magnesium alloy AZ31B processing map hot deformation flow instability |
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