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微量鈧對Al-2．5Cu-1．5Mg合金時效特性與微觀組織的影響
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TG146.2

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Role of Minor Sc Addition on Ageing Characteristics and Microstructure in Al-2.5Cu-1.5Mg Alloy
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    摘要:

    研究了微量鈧對Al-2．5Cu-1．5Mg合金微觀組織與時效特性的影響。結(jié)果表明，微量鈧的添加增強了Al-2．5Cu-1．5Mg合金的時效硬化效果，但并未改變該合金時效硬化的總體規(guī)律。透射電鏡分析發(fā)現(xiàn)GPB在合金時效硬化第二階段初期才開始析出，并且是該合金第二階段硬化的主要原因，微量鈧的添加促進了Al-2．5Cu-1．5Mg合金中GPB的彌散細小析出。

    Abstract:

    The effects of small addition of scandium on the microstructure and ageing characteristics in Al-2.5Cu-1.5Mg alloys have been investigated. The results indicate that the age hardening response of the Al-2.5Cu-1.5Mg alloy can be enhanced while the general form of the ageing curve is not altered by small addition of Sc. TEM observations show that GPB can only precipitated during the second age hardening period which will make a great contribution to the age hardening, and the morphology of GPB can be modified by the small addition of Sc, which does result in a refinement of the distribution of GPB in Al-2.5Cu-1.5Mg-0.2Sc.

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陳志國 鄭子樵 RingerSP.微量鈧對Al-2．5Cu-1．5Mg合金時效特性與微觀組織的影響[J].稀有金屬材料與工程,2004,33(8):811~814.[Chen Zhiguo, Zheng Ziqiao, Ringer S P. Role of Minor Sc Addition on Ageing Characteristics and Microstructure in Al-2.5Cu-1.5Mg Alloy[J]. Rare Metal Materials and Engineering,2004,33(8):811~814.]
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  • 最后修改日期:2003-12-29
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