| 挤压态Mg-6Zn-xEr合金的微观结构和力学性能 |
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| 引用本文： | 刘轲,王庆峰,杜文博,王朝辉,李淑波.挤压态Mg-6Zn-xEr合金的微观结构和力学性能[J].中国有色金属学会会刊,2013,23(10):2863-2873. |
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| 作者姓名： | 刘轲 王庆峰 杜文博 王朝辉 李淑波 |
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| 作者单位： | 北京工业大学 材料科学与工程学院,北京,100124 |
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| 基金项目： | Project （51071004） supported by the National Natural Science Foundation of China; Project （2011BAE22B01-3） supported by the National Key Technology R＆D Program during the 12th Five-Year Period, China |
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| 摘 要： | 研究铸态、挤压态和挤压峰值态的Mg-6Zn-xEr合金的微观组织和力学性能。结果表明，Er的加入可显著改善Mg-6Zn合金的力学性能，经过峰值时效后合金的力学性能得到进一步提高；挤压态Mg-6Zn-0．5Er合金经过峰值时效处理后具有最佳的拉伸强度。该合金的抗拉强度和屈服强度分别为329MPa和183MPa，伸长率为12％。这表明添加0．5％Er可显著提高Mg-6Zn合金的时效硬化行为。挤压峰值态Mg-6Zn-0．5Er合金较好的力学性能归因于结构的细化和β1相的析出强化。
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| 关 键 词： | 镁合金 Mg—Zn—Er合金 热挤压 动态重结晶 |
| 收稿时间： | 6 August 2012 |
Microstructure and mechanical properties of extruded Mg-6Zn-xEr alloys |
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| Ke LIU,Qing-feng WANG,Wen-bo DU,Zhao-hui WANG,Shu-bo LI.Microstructure and mechanical properties of extruded Mg-6Zn-xEr alloys[J].Transactions of Nonferrous Metals Society of China,2013,23(10):2863-2873. |
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| Authors: | Ke LIU Qing-feng WANG Wen-bo DU Zhao-hui WANG Shu-bo LI |
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| Affiliation: | (School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China Received 6 August 2012; accepted 30 January 2013) |
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| Abstract: | The microstructure and mechanical properties of the Mg-6Zn-xEr alloys in the as-cast, as-extruded and extruded-T5 states were investigated. It is found that the addition of Er has an obvious effect on improving mechanical properties of Mg-6Zn based alloys. The results suggest that the Mg-6Zn-0.5Er alloy in the peak aged state shows the best tensile strength. The ultimate tensile strength and the yield tensile strength of the peak-aged Mg-6Zn-0.5Er alloy are about 329 MPa and 183 MPa, respectively, companying with a good elongation of 12%. The addition of 0.5% Er into the Mg-6Zn based alloys has a great effect on improving ageing hardening response. The highest tensile strength of the peak-aged Mg-6Zn-0.5Er alloy is mainly due to the refinement of microstructure and the precipitation of β1 phase. |
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| Keywords: | magnesium alloy Mg-Zn-Er alloy hot extrusion dynamic recrystallization |
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