| 稀土对时效-回归-再时效处理的Al-Zn-Mg合金硬度和氢脆的影响 |
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| 引用本文： | 徐跃,于文学,郑伟涛,赵竹第.稀土对时效-回归-再时效处理的Al-Zn-Mg合金硬度和氢脆的影响[J].吉林大学学报(理学版),2004,42(4):578-581. |
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| 作者姓名： | 徐跃 于文学 郑伟涛 赵竹第 |
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| 作者单位： | 1. 吉林大学测试科学实验中心, 长春 130023； 2. 吉林大学材料科学与工程学院材料科学系, 长春 130012 |
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| 基金项目： | 国家自然科学基金(批准号:50372024)，教育部高校青年教师基金(批准号:2002359). |
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| 摘 要： | 将少量稀土元素添加到Al-Zn-Mg合金中进行时效-回
归-再时效处理.利用扫描电子显微镜和X射线衍射对该合金的显微结构和沉淀相进行了观察和研究. 结果表明, 经过时效-回归-再时效处理后, 稀土Al-Zn-Mg合金的晶粒尺寸减小, 沉淀相MgZn2增加, 同时, 峰时效硬度和氢脆阻力增强.
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| 关 键 词： | 稀土 Al-Zn-Mg合金 时效-回归-再时效 硬度和氢脆 |
| 文章编号： | 1671-5489(2004)04-0578-04 |
| 收稿时间： | 2004-02-17 |
| 修稿时间： | 2004年2月17日 |
Effects of rare earths on hardness and hydrogen embrittlement of an aged-retrogressed-reaged Al-Zn-Mg alloy |
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| XU Yue,YU Wen-xue,ZHENG Wei-tao,ZHAO Zhu-di.Effects of rare earths on hardness and hydrogen embrittlement of an aged-retrogressed-reaged Al-Zn-Mg alloy[J].Journal of Jilin University: Sci Ed,2004,42(4):578-581. |
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| Authors: | XU Yue YU Wen-xue ZHENG Wei-tao ZHAO Zhu-di |
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| Institution: | 1. Test Science Experiment Center, Jilin University, Changchun 130023, China;2.Department of Materials Science, College of Materials Science and Engineering, Jilin University 130012, China |
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| Abstract: | The effects of a small amount of rare earth (RE) elements added on the hardness and hydrogen embrittlement of an aged and retrogressed-reaging Al-Zn-Mg alloy were investigated. Scanning electron microscopy and X-ray diffraction were employed to study the microstructure and the precipitation phase of the alloy. The addition of RE improves the precipitation of a strengthing phase (MgZn_2) and decreases the grain size. By the addition of RE, the strength, hardness and elongation of the alloy at peak-aging can be improved, the hardness and hydrogen embrittlement resistance of the alloy after aged-retrogressed-reaged can be enhanced. |
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| Keywords: | rare earths Al-Zn-Mg alloy aging-retrogression-reaging hardness and hydrogen embrittlement |
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