| 微量Zn对Al-4.2Cu-1.4Mg合金应力腐蚀与微观组织的影响 |
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| 引用本文： | 杨文玲,陈志国,黄裕金,周 娴,胡 炜.微量Zn对Al-4.2Cu-1.4Mg合金应力腐蚀与微观组织的影响[J].稀有金属材料与工程,2011,40(7):1206-1210. |
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| 作者姓名： | 杨文玲 陈志国 黄裕金 周 娴 胡 炜 |
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| 作者单位： | 中南大学,湖南长沙,410083 |
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| 基金项目： | 国家自然科学基金资助项目，国家重点基础研究发展规划项目 |
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| 摘 要： | 通过慢应变速率拉伸、动电位极化曲线测试、透射电子显微分析(TEM)、背散射电子衍射(EBSD)等实验较系统地研究了微量Zn对Al-4.2Cu-1.4Mg合金应力腐蚀与微观组织的影响规律。结果表明,微量Zn的添加显著影响合金的腐蚀性能,且随着Zn含量增加,合金的抗应力腐蚀敏感性以及其对应的开路电位均呈峰值变化,含Zn量0.29%合金的抗腐蚀能力最佳。EBSD研究表明,含0.29%Zn的Al-4.2Cu-1.4Mg合金与其它合金相比存在较多的低能量小角度晶界,这可能是微量Zn显著影响该合金抗应力腐蚀性能的主要原因。
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| 关 键 词： | Al-4.2Cu-1.4Mg合金 应力腐蚀敏感性 微观组织 |
| 收稿时间： | 7/5/2010 12:00:00 AM |
Effect of Trace Zn on Stress Corrosion Resistance and Microstructure of Al-4.2Cu-1.4Mg Alloy |
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| Yang Wenling,Chen Zhiguo,Huang Yujin,Zhou Xian and Hu Wei.Effect of Trace Zn on Stress Corrosion Resistance and Microstructure of Al-4.2Cu-1.4Mg Alloy[J].Rare Metal Materials and Engineering,2011,40(7):1206-1210. |
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| Authors: | Yang Wenling Chen Zhiguo Huang Yujin Zhou Xian and Hu Wei |
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| Affiliation: | Central South University, Changsha 410083, China |
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| Abstract: | The effect of trace addition of Zn on the stress corrosion cracking (SCC) resistance and microstructure of Al-4.2Cu-1.4Mg alloy was studied by means of the slow strain rate technique (SSRT), potentiodynamic polarization test, transmission electron microscopy (TEM) and electron back scattered diffraction (EBSD). The results show that the stress corrosion cracking resistance is improved at the beginning and then decreased with the increase of Zn content. The optimum amount of Zn addition is 0.29% to improve SCC resistance. EBSD results show that there are much more low-angle grain boundaries with low energy in the 0.29% Zn contained alloy, which is probably the main reason why Zn can significantly influence SCC resistance of the alloy |
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| Keywords: | Al-4 2Cu-1 4Mg alloy stress corrosion intensity microstructure |
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