| 稀土对Al-Zn-Mg合金力学性能和应力腐蚀的影响 |
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| 引用本文： | 徐跃,李雪冰,于文学,赵竹第,刘艳华,张剑桥.稀土对Al-Zn-Mg合金力学性能和应力腐蚀的影响[J].吉林大学学报(理学版),2003,41(4):506-509. |
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| 作者姓名： | 徐跃 李雪冰 于文学 赵竹第 刘艳华 张剑桥 |
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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. 吉林大学物理学院， 长春 130023；3. 吉林大学材料科学与工程学院, 长春 130023 |
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| 摘 要： | 将0.06%稀土加入到Al-Zn-Mg合金中, 固溶处理后在150 ℃下时效. 在峰时效条件下 , 观察稀土对其力学性能和抗应力腐蚀断裂性能的影响. 结果表明, 稀土的加入使硬度峰值出现的时间提前, 并使硬度峰值、 屈服强度、 抗拉强度、 延伸率和抗应力腐蚀断裂的能力增加. 金相观察和X射线衍射结果表明, 稀土的加入减小了晶粒尺寸, 促进了强化相MgZn2的析出, 此外稀土还能够明显减少合金中的 氢含量.
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| 关 键 词： | Al-Zn-Mg合金 稀土 力学性能和应力腐蚀 |
| 文章编号： | 1671-5489(2003)04-0506-04 |
| 收稿时间： | 2003-05-02 |
| 修稿时间： | 2003年5月2日 |
Effects of Rare Earth on Mechanical Properties and Stress Corrosion Behavior of Al-Zn-Mg Alloy |
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| XU Yue,LI Xue-bing,YU Wen-xue,ZHAO Zhu-di,LIU Yan-hua,ZHANG Jian-qiao.Effects of Rare Earth on Mechanical Properties and Stress Corrosion Behavior of Al-Zn-Mg Alloy[J].Journal of Jilin University: Sci Ed,2003,41(4):506-509. |
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| Authors: | XU Yue LI Xue-bing YU Wen-xue ZHAO Zhu-di LIU Yan-hua ZHANG Jian-qiao |
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| Institution: | 1. Analysis and Test Center, Jilin University, Changchun 130023, China;2. College of Physics, Jilin University, Changchun 130023, China；3. College of Materials Science and Engineering, Jilin University, Changchun 130023, China |
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| Abstract: | The effects of small addition of rare earth (RE) on mechanical properties and stress corrosion behavior of Al-Zn-Mg alloy have been investigated. The results show that the addition of RE causes a shift of the peak hardness to shorter aging time and significantly increases the hardness, yield
strength, tensile strength, elongation as well as stress corrosion cracking (SCC) resistance in the peak hardness of alloys aged at 150 ℃. Optical microscopy observation and X-ray diffraction showed that RE decreases grain sizes and expedite the precipitation of strengthing phase(MgZn2). In addition, the a ddition of RE decreases markedly hydrogen content in the alloy. |
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| Keywords: | Al-Zn-Mg alloy rare earth mechanical property and stress corrosion |
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