| 近固溶限预析出对7055铝合金组织和力学性能的影响 |
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| 引用本文： | 张茁,陈康华,刘红卫,李松,黄兰萍. 近固溶限预析出对7055铝合金组织和力学性能的影响[J]. 粉末冶金材料科学与工程, 2003, 8(2): 162-167 |
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| 作者姓名： | 张茁 陈康华 刘红卫 李松 黄兰萍 |
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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： | 国家重点基础研究发展规划项目(G1999064900)，教育部高等学校骨干教师资助计划资助(教育司[2000]65) |
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| 摘 要： | 通过改变固溶处理条件,即在近固溶限预析出并结合预析出前后的金相组织及不同时效制度下的电阻率和强度的对比,分析了近固溶限预析出对7055铝合金力学性能的影响。结果表明:在480℃时预析出在保持高的屈服强度和抗拉强度的同时改善和提高合金的抗SCC性能。
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| 关 键 词： | 7055铝合金 力学性能 固溶 显微组织 应力腐蚀 |
| 修稿时间： | 2003-03-17 |
Effects of preprecipitation near solution temperature limit on microstructure and mechanical property of high strength 7055 aluminum alloy |
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| ZHANG Zhuo,CHEN Kang-hua,LIU Hong-wei,LI Song,HUANG Lan-ping. Effects of preprecipitation near solution temperature limit on microstructure and mechanical property of high strength 7055 aluminum alloy[J]. materials science and engineering of powder metallurgy, 2003, 8(2): 162-167 |
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| Authors: | ZHANG Zhuo CHEN Kang-hua LIU Hong-wei LI Song HUANG Lan-ping |
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| Abstract: | The size and the distribution of the precipitation in the grain and at the boundary of the grain are the key factors to affect the mechanical properties of ultra high strength aluminum alloys. The microstructure , electric resistance rate , mechanical properties were studied before and after preprecipitation near the solution temperature limit in different aging process. The results show that preprecipitation near the solution temperature can not only preserve the high yield strength and ultimate strength of 7055 high strength aluminum alloys, but also improve stress corrosion cracking resistance of the alloys. |
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| Keywords: | 7055 aluminum alloys solution microstructure mechanical property stress corrosion |
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