| Zn─22％Al合金的电致超塑性效应 |
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| 引用本文： | 李尧,董晓华.Zn─22％Al合金的电致超塑性效应[J].中国有色金属学报,1996(3). |
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| 作者姓名： | 李尧 董晓华 |
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| 作者单位： | 湖北工学院机械工程系 |
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| 基金项目： | 国家自然科学基金,湖北省自然科学基金 |
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| 摘 要： | 以普通处理的Ｚｎ２２％Ａｌ合金为研究对象，研究了脉冲电流对其超塑性效应的影响。结果表明，合金的延伸率显著提高并以更高的ｍ值为特征；最佳超塑变形温度扩宽为一区间。电镜观察表明，合金局部表现出强烈的变形强化特征，同时局部又以很高的应力松驰为特点，这两个过程达到动态平衡，有效地提高了合金的均匀变形能力
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| 关 键 词： | 电致超塑性 Zn-22％Al合金 位错 |
ELECTROSUPERPLASTIC EFFECT OF Zn 22%Al ALLOY |
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| Li Yao,Dong Xiaohua.ELECTROSUPERPLASTIC EFFECT OF Zn 22%Al ALLOY[J].The Chinese Journal of Nonferrous Metals,1996(3). |
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| Authors: | Li Yao Dong Xiaohua |
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| Affiliation: | Li Yao,Dong Xiaohua Department of Mechanical Engineering,Hubei Institute of Technology,Wuhan 430068 |
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| Abstract: | The effect of pulse electric current on the superplasticity of the common treated Zn 22% Al alloy was studied. The results showed that the elongation of the alloy was appreciably increased, which was characterized by a higer m value, and the optimum superplastic deformation temperature was enlarged to be a temperature range. With the SEM, we could find that part of the alloy exhibited strong deformation strengthened character, and concurrently occurred high stress relaxation. These two processes reached dynamic equilibrium, which increased the homogeneous deformability effectively. |
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| Keywords: | electro superplasticity Zn 22%Al alloy dislocation |
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