| Mg-11.21Gd-2.26Y-0.44Zr稀土镁合金热变形行为 |
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| 引用本文： | 薛勇,张治民,杨勇彪.Mg-11.21Gd-2.26Y-0.44Zr稀土镁合金热变形行为[J].塑性工程学报,2011,18(6). |
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| 作者姓名： | 薛勇 张治民 杨勇彪 |
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| 作者单位： | 1. 中北大学 材料科学与工程学院,太原 030051;北京航空航天大学 机械工程及自动化学院,北京 100191
2. 中北大学 材料科学与工程学院,太原,030051 |
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| 基金项目： | 山西省留学基金，山西省自然科学基金 |
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| 摘 要： | 采用差热分析、金相显微镜等手段,分析了Mg-11.21Gd-2.26Y-0.44Zr稀土镁合金的微观组织,结果发现,在温度530℃均匀化热处理4h,可使大部分合金元素固溶。采用Gleeble3800热模拟实验机,在温度为320℃～480℃、应变速率为0.001s-1～0.1s-1、最大变形程度为60%的条件下,对该镁合金进行热压缩实验,结果表现,材料流变应力行为和显微组织受到变形温度和变形速率的严重影响;合金的流动应力可以采用Sellars方程形式描述;计算出的变形激活能为225.67kJ.mol-1。
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| 关 键 词： | 稀土镁合金 热模拟变形 流变应力 变形激活能 |
Deformation behavior of Mg-11.21Gd-2.26Y-0.44Zr alloy at elevated temperatures |
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| XUE Yong,ZHANG Zhi-min,YANG Yong-biao.Deformation behavior of Mg-11.21Gd-2.26Y-0.44Zr alloy at elevated temperatures[J].Journal of Plasticity Engineering,2011,18(6). |
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| Authors: | XUE Yong ZHANG Zhi-min YANG Yong-biao |
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| Affiliation: | XUE Yong1,2 ZHANG Zhi-min1 YANG Yong-biao1(1.School of Material Science and Engineering,North University of China,Taiyuan 030051 China)(2.School of Mechanical Engineering and Automation,Beihang University,Beijing 100191 China) |
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| Abstract: | The microstructure of Mg-Gd-Y-Zr RE-containing magnesium alloy was investigated by means of differential thermal analysis and metallo-graphic microscope.The results show that the majority of alloy elements turn into solid solution through uniform heat treatment at 530℃ for 4h.Hot compression tests of Mg-11.21Gd-2.26Y-0.44Zr alloy were performed with Gleeble3800 thermal modeling tester at strain rate 0.001s-1～0.1s-1,deformation temperature 320℃～480℃,and the deformation degree not exceeding 60%.The results show that the flow stress behavior and microstructures strongly depend on the deformation temperature and strain rate during hot compression deformation;the flow stress can be calculated by Sellars equation;the activation energy during hot deformation is 225.67kJ·mol-1 by calculation. |
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| Keywords: | RE-containing magnesium alloy thermal modeling deformation flow stress activation energy of deformation |
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