| 高温预析出对Al-Zn-Mg系铝合金时效硬化和应力腐蚀的影响 |
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| 引用本文： | 李松,陈康华,刘红卫,黄兰萍,张茁.高温预析出对Al-Zn-Mg系铝合金时效硬化和应力腐蚀的影响[J].粉末冶金材料科学与工程,2003,8(2):168-173. |
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| 作者姓名： | 李松 陈康华 刘红卫 黄兰萍 张茁 |
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| 作者单位： | 中南大学粉末冶金国家重点实验室,湖南,长沙,410083 |
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| 基金项目： | 国家武器装备预先研究项目(41312020205) |
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| 摘 要： | 研究了高温固溶后降温处理工艺对中强可使预析出LC52和7039铝合金的组织、时效硬化和应力腐蚀的影响。金相观察发现,高温预析出可优先在晶界处产生,并提高随后时效状态下晶界析出相的不连续分布程度,温度降低到一定程度晶内和晶界产生大量析出。合金拉伸性能和应力腐蚀结果表明,预析出在保持强度和塑性的同时,可提高抗应力腐蚀性能。而预析出温度降低,合金强度呈下降趋势。
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| 关 键 词： | 中强可焊 铝合金 应力腐蚀 析出 固溶 时效 |
| 修稿时间： | 2003年3月13日 |
Effect of post-solution high-temperature preprecipitation on the microstructure and properties of Al-Zn-Mg aluminum alloy |
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| LI Song,CHEN Kang-hua,LIU Hong-wei,HUANG Lan-ping,ZHANG Zhuo.Effect of post-solution high-temperature preprecipitation on the microstructure and properties of Al-Zn-Mg aluminum alloy[J].materials science and engineering of powder metallurgy,2003,8(2):168-173. |
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| Authors: | LI Song CHEN Kang-hua LIU Hong-wei HUANG Lan-ping ZHANG Zhuo |
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| Abstract: | The high temperature near-solvus pre-precipitation following higher temperature solution treatment were performed on LC52 and Quansi 7039 aluminum alloy. The effect of the pre-precipitation on the microstructure, age hardening and stress corrosion of LC52 and quasi 7039 alloy were investigated. The optical microscopic examination shows that the nearsolvus pre-precipitation appears at grain boundary preferentially and enhances the discontinuity of grain boundary precipitates. The stress corrosion resistance of aged alloys is improved with non-deteriorated strength and plasticity via the pre-precipitation. |
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| Keywords: | medium weldability aluminum alloy stress corrosion precipitation solution aging |
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