| Mn在2297铝锂合金中的微合金化作用 |
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| 引用本文： | 桑冯建,郑子樵,王海金.Mn在2297铝锂合金中的微合金化作用[J].稀有金属材料与工程,2018,47(3):871-877. |
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| 作者姓名： | 桑冯建 郑子樵 王海金 |
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| 作者单位： | 中南大学 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)资助项目(2012CB619503)；国家高技术研究发展计划(863计划)项目(2013AA032401) |
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| 摘 要： | 利用金相显微镜、拉伸测试、SEM、TEM、STEM-HAADF等手段研究了微量Mn的添加对2297铝锂合金微观组织与力学性能的影响。结果表明,Mn在2297铝锂合金中主要以AlCuMn棒状弥散粒子和Al(CuMnFe)粗大相形式存在,并且相比Mn-free合金,2297合金中粗大相尺寸较小、分布均匀,因而合金的抗拉强度得到提高。研究表明,Mn的添加没有影响Al_3Zr粒子的析出行为,尽管析出了AlCuMn棒状弥散相,但整体上没有改变2297合金的再结晶程度。
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| 关 键 词： | 2297铝锂合金 Mn Al3Zr 再结晶 |
| 收稿时间： | 2016/1/8 0:00:00 |
| 修稿时间： | 2016/8/21 0:00:00 |
Micro-alloying Effects of Mn in 2297 Al-Li Alloy |
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| Sang Fengjian,Zheng Ziqiao and Wang Haijin.Micro-alloying Effects of Mn in 2297 Al-Li Alloy[J].Rare Metal Materials and Engineering,2018,47(3):871-877. |
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| Authors: | Sang Fengjian Zheng Ziqiao and Wang Haijin |
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| Affiliation: | School of Materials Science and Engineering,Central South University,School of Materials Science and Engineering,Central South University,School of Materials Science and Engineering,Central South University |
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| Abstract: | The effects of trace Mn addition on microstructure and mechanical properties of 2297 Al-Li alloy were investigated by optical microscopy, tensile test, scanning electron microscopy(SEM), transmission electron microscopy(TEM) and scanning transmission electron microscopy(STEM), fitted with high-angle annular dark field detector(HAADF). The results show that Mn exists in the form of AlCuMn rod-like dispersed particle and Al(CuMnFe) coarse phase in 2297 alloy. In addition, the Al(CuMnFe) phases in 2297 alloy are uniformly distributed and the size of the coarse particles is smaller than that in Mn-free alloy. As a result, the tensile strength of 2297 alloy was enhanced. The study indicates that the addition of Mn has no influence on the precipitation behavior of Al3Zr. And the level of recrystallization in 2297 alloy has not been changed, though the AlCuMn rod-like dispersed phases are precipitated. |
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| Keywords: | 2297 Al-Li alloy Mn Al3Zr recrystallization |
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