| 热处理工艺对超高强铝合金组织与性能的影响 |
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| 引用本文： | 曾渝,尹志民,朱远志,潘青林,崔建忠. 热处理工艺对超高强铝合金组织与性能的影响[J]. 矿冶工程, 2004, 24(3): 67-69 |
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| 作者姓名： | 曾渝 尹志民 朱远志 潘青林 崔建忠 |
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| 作者单位： | 中南大学,材料科学与工程学院,湖南,长沙,410083;东北大学,冶金与材料学院,辽宁,沈阳,110015 |
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| 基金项目： | 国家“8 63”高技术研究项目 (2 0 0 1AA332 0 30 ) |
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| 摘 要： | 通过硬度、拉伸性能测试, 金相、扫描电镜、透射电镜观察, X 射线衍射分析, 研究了热处理工艺对新型电磁铸造合金(Al-9.0Zn-2.5～2.8Mg-2.0～2.4Cu-0.1～0.15Zr-0.224Ag)显微组织和性能的影响。结果表明:合金的峰时效制度为120 ℃/24 h。在峰时效条件下, 合金的抗拉强度达到730 MPa, 屈服强度达到705 MPa, 延伸率为8.8 %。合金有显著的时效硬化特性, 其强化机制主要是沉淀强化, 合金的主要强化相为GP 区和η′过渡相。合金的断裂形式为微孔聚集型韧性断裂。
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| 关 键 词： | 超高强铝合金 热处理 显微组织 力学性能 |
| 文章编号： | 0253-6099(2004)03-0067-03 |
| 收稿时间： | 2003-09-26 |
| 修稿时间： | 2003-09-26 |
The Effect of Heat Treatment on Microstructure and Mechanical Properties of Ultra High Strength Aluminum Alloy |
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| ZENG Yu ,YIN Zhi-min ,ZHU Yuan-zhi ,PAN Qing-lin ,CUI Jian-zhong. The Effect of Heat Treatment on Microstructure and Mechanical Properties of Ultra High Strength Aluminum Alloy[J]. Mining and Metallurgical Engineering, 2004, 24(3): 67-69 |
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| Authors: | ZENG Yu YIN Zhi-min ZHU Yuan-zhi PAN Qing-lin CUI Jian-zhong |
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| Affiliation: | 1. College of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China;2. College of Metallurgy and Material, Northeastern University, Shenyang 110015, Liaoning, China |
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| Abstract: | An Al-9.0Zn-2.5～2.8Mg-2.0～2.4Cu-0.1～0.15Zr-0.2～0.25Ag Ultra high strength aluminum alloy was prepared by low frequency electric-magnetic casting process, The microstructure and mechanical properties of the alloy under different treatment conditions was investigated by tensile properties and hardness test, SEM, TEM observations and XRD analysis.The results show that the peak aging occurred at 120 ℃for 24 h.Under the peak-ageing condition, the tensile strength,yield strength and elongation of the studied alloy was 730 MPa, 705 MPa and 8.8 %, respectively.The main strengthening mechanism of the alloy was precipitation hardening and the strengthening phase was GP zone and η′(MgZn2). |
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| Keywords: | ultra high strength aluminum alloy heat treatment microstructure tensile properties |
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