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Aging Behavior of YAl2p/Mg-14Li-1Al Composite
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Aging Behavior of YAl2p/Mg-14Li-1Al Composite
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National Natural Science Foundation of China (50901005); Aeronautics Fundamental Science Foundation of China (2010ZF51068)

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    摘要:

    采用攪拌鑄造的方法制備了YAl2p/Mg-14Li-1Al復(fù)合材料，并使用硬度試驗(yàn)、差熱分析和X射線衍射等方法對(duì)該材料的時(shí)效行為進(jìn)行了研究。結(jié)果表明，基體合金及其復(fù)合材料硬度的變化均與θ-MgLi2Al相的析出和分解有關(guān)。復(fù)合材料的強(qiáng)化效果來自于YAl2顆粒的加入以及基體合金的析出行為。其中，加入YAl2顆粒所產(chǎn)生的強(qiáng)化效果是穩(wěn)定的，而基體合金的析出強(qiáng)化則是不穩(wěn)定的且依賴于它自身的時(shí)效行為。此外，YAl2顆粒的加入延緩了時(shí)效行為的發(fā)生。

    Abstract:

    YAl2p/Mg-14Li-1Al composite was made by a stir-casting technique. The aging behavior of the composite was investigated using hardness test, differential scanning calorimetry, and X-ray diffraction. The results show that the microhardness variations of both the matrix alloy and its composite are related to the precipitation and decomposition of θ-MgLi2Al phase. The strengthening of the composite is from the addition of YAl2 particulates and the precipitation in matrix alloy. The former contribution is stable, but the latter is unstable and depends on the aging behavior. The addition of YAl2 particulates delays occurring of the aging behavior of composite.

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吳國清,張 濤,沙 維,王素潔,黃 正. Aging Behavior of YAl2p/Mg-14Li-1Al Composite[J].稀有金屬材料與工程,2014,43(12):2958~2961.[Wu Guoqing, Zhang Tao, Sha Wei, Wang Sujie, Huang Zheng. Aging Behavior of YAl2p/Mg-14Li-1Al Composite[J]. Rare Metal Materials and Engineering,2014,43(12):2958~2961.]
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  • 收稿日期:2013-12-14
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  • 在線發(fā)布日期: 2015-04-16
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