| 微量Sc对2195铝锂合金应变时效态的显微组织和力学性能的影响 |
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| 引用本文： | 尹登峰,郑子樵,余志明. 微量Sc对2195铝锂合金应变时效态的显微组织和力学性能的影响[J]. 中国有色金属学报, 2003, 13(3): 611-615 |
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| 作者姓名： | 尹登峰 郑子樵 余志明 |
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| 作者单位： | 中南大学,材料科学与工程学院,长沙,410083 |
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| 基金项目： | 国家十五重点攻关计划项目 |
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| 摘 要： | 采用拉伸试验机、光学金相显微镜、透射电镜、扫描电镜等设备研究了添加微量Sc对2195铝锂合金应变时效态的显微组织和拉伸性能的影响。结果表明：微量Sc加入后能生成细小弥散Al3(Sc，Zr)质点，起到抑制再结晶的作用；微量Sc的加入既促使合金晶内析出的T1相分布更弥散均匀，又能使亚晶界和晶界上析出的T1相变得细小，几乎不出现明显的晶界无析出带，因而可在不降低合金强度的前提下有效地改善其塑性。
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| 关 键 词： | 铝锂合金 应变时效态 显微组织 力学性能 钪 |
| 文章编号： | 1004-0609(2003)03-0611-05 |
| 修稿时间： | 2002-07-30 |
Effect of trace Sc addition on microstructure and mechanical properties of thermomechanically treated 2195 Al-Li alloy |
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| YIN Deng-feng,ZHENG Zi-qiao,YU Zhi-ming. Effect of trace Sc addition on microstructure and mechanical properties of thermomechanically treated 2195 Al-Li alloy[J]. The Chinese Journal of Nonferrous Metals, 2003, 13(3): 611-615 |
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| Authors: | YIN Deng-feng ZHENG Zi-qiao YU Zhi-ming |
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| Abstract: | By using tensile tester, OM, TEM and SEM, the effect of trace Sc on microstructure and tensile strength of thermomechanically treated 2195 Al-Li alloy was studied. The results show that addition of trace Sc can make Al 3(Sc, Zr) particles distribute dispersively and evenly, and it can strongly retard recrystallization of the alloys and encourage the homogeneous precipitation of T 1 phase throughout the matrix without the grain precipitation free zone (PFZ). Therefore, the ductility of the alloys containing trace Sc is improved. |
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| Keywords: | Al-Li alloy Sc microstructure mechanical properties |
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