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Mn在2297鋁鋰合金中的微合金化作用
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中南大學(xué)材料科學(xué)與工程學(xué)院,中南大學(xué)材料科學(xué)與工程學(xué)院,中南大學(xué)材料科學(xué)與工程學(xué)院

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TG146.2

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國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)資助項(xiàng)目(2012CB619503)；國家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)項(xiàng)目(2013AA032401)


Micro-alloying Effects of Mn in 2297 Al-Li Alloy
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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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    摘要:

    利用金相顯微鏡、拉伸測試、SEM、TEM、STEM-HAADF等手段研究了微量Mn的添加對2297鋁鋰合金微觀組織與力學(xué)性能的影響。結(jié)果表明，Mn在2297鋁鋰合金中主要以AlCuMn棒狀彌散粒子和Al（CuMnFe）粗大相形式存在，并且相比Mn-free合金，2297合金中粗大相尺寸較小，分布均勻，因而合金的拉伸強(qiáng)度得到提高；研究表明Mn的添加沒有影響Al3Zr粒子的析出行為，盡管析出了AlCuMn棒狀彌散相，但整體上沒有改變2297合金的再結(jié)晶程度。

    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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桑馮建,鄭子樵,王海金. Mn在2297鋁鋰合金中的微合金化作用[J].稀有金屬材料與工程,2018,47(3):871~877.[Sang Fengjian, Zheng Ziqiao, 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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  • 收稿日期:2016-01-08
  • 最后修改日期:2016-08-21
  • 錄用日期:2016-09-18
  • 在線發(fā)布日期: 2018-04-11
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