| 时效对超高强含Sc铝合金组织和性能的影响 |
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| 引用本文： | 邹亮,潘清林. 时效对超高强含Sc铝合金组织和性能的影响[J]. 轻金属, 2012, 0(1): 57-60 |
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| 作者姓名： | 邹亮 潘清林 |
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| 作者单位： | 1. 宝钢股份硅钢部研究所,上海,201900
2. 中南大学材料科学与工程学院,湖南长沙,410083 |
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| 基金项目： | 国家863高新技术新材料课题(2006AA03Z523) |
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| 摘 要： | 采用维氏硬度测量、室温拉伸性能测试和显微组织结构分析,研究了不同时效制度下Al-Zn-Cu-Mg-Sc-Zr合金的力学性能、腐蚀性能和显微组织.结果表明,该合金具有显著的时效硬化效应,随时效温度的升高,合金达到时效硬度峰值的时间缩短.合金适宜的时效制度为120℃24h.此时,合金的抗拉强度、屈服强度、伸长率和维氏硬度分别为696N/mm2、654N/mm2、11.1％和211.2HV.合金中主要强化相为GP区和η'相,主要强化作用为沉淀强化及弥散强化.时效过程中Al3Sc和Al3(Sc,Zr)质点表现出较强的热稳定性；合金抗晶间腐蚀能力随时效时间的延长而增强.
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| 关 键 词： | Al-Zn-Cu-Mg-Sc-Zr合金 时效处理 微观组织 力学性能 |
Effect of aging treatment of Al-Zn-Cu-Mg-Sc-Zr alloy on microstructures and properties |
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| ZOU Liang , PAN Qing-lin. Effect of aging treatment of Al-Zn-Cu-Mg-Sc-Zr alloy on microstructures and properties[J]. Light Metals, 2012, 0(1): 57-60 |
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| Authors: | ZOU Liang PAN Qing-lin |
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| Affiliation: | 1.Silicon Steel Institute of Bao Steel Silicon Department,Shanghai 201900,China;2.School of Materials Science and Engineering,Central South University,Changsha 410083,China) |
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| Abstract: | The microstructures and properties of Al-Zn-Cu-Mg-Sc-Zr alloy after different aging treatments were studied by means of O.M、TEM observation,hardness test and tensile test at room-temperature.The results showed that the alloy had the character of aging hardening,the peak hardness arrived earlier after increasing aging temperature.The proper artificial aging treatment of the studied alloy was 120℃24h.At this condition,tensile strength,yield strength,elongation and hardness were 696N/mm2,654N/mm2,11.1% and 211.2HV,respectively.The main strengthening phase was GP zone and η′phase,which leaded to precipitation strengthening and dispersion strengthening.Al3Sc and Al3(Sc,Zr) particles performed well thermo stability;the property of retarding transgranular corrosion was improved with prolonging aging time. |
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| Keywords: | Al-Zn-Cu-Mg-Sc-Zr alloy aging treatment microstructures mechanical properties |
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