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從電子結(jié)構(gòu)和成鍵特性分析高Cu/Mg比Al-Cu-Mg-Ag合金強(qiáng)化機(jī)制
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國(guó)家“973”項(xiàng)目(2005CB623705-04), 國(guó)家自然科學(xué)基金面上項(xiàng)目(11074195)


Study on the Strengthening Mechanism of Al-Cu-Mg-Ag Alloy with the Valence Electron Structures and Atomic Bonding of Precipitates
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    摘要:

    提出了計(jì)算高Cu/Mg比Al-Cu-Mg-Ag合金主要析出相W相及相界面電子結(jié)構(gòu)的計(jì)算模型與方法，從合金相結(jié)構(gòu)因子和相界面結(jié)合因子分析了合金的強(qiáng)化機(jī)制。基于余氏的固體分子經(jīng)驗(yàn)電子理論和程氏改進(jìn)的TFD理論，對(duì)Al-Cu-Mg-Ag合金主要析出相Ω相及相界面電子結(jié)構(gòu)進(jìn)行了計(jì)算，發(fā)現(xiàn)合金相及相界面價(jià)電子結(jié)構(gòu)與合金強(qiáng)化機(jī)制有密切的關(guān)系，并從電子結(jié)構(gòu)層次上闡釋分析了合金中θ′, Ω，θ相的競(jìng)爭(zhēng)相析出機(jī)制及對(duì)合金強(qiáng)化機(jī)制的影響

    Abstract:

    This work aims to develop a physically based numerical model to calculate the valence electron structures and atomic bonding of the precipitates of Al-Cu-Mg-Ag alloy with high Cu/Mg ratio with the empirical electron theory of solids and molecules. The valence electron structures and the interface conjunction of W phase were calculated, and they were investigated with the phase structure factor. Accordingly, on the basis of the empirical electron theory of solid and molecules, the precipitation and stability of the precipitates and the strengthening mechanism of Al-Cu-Mg-Ag alloy were explained on the level of valence electron structure

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侯延輝,李光強(qiáng),劉志義,樊希安.從電子結(jié)構(gòu)和成鍵特性分析高Cu/Mg比Al-Cu-Mg-Ag合金強(qiáng)化機(jī)制[J].稀有金屬材料與工程,2011,40(3):407~412.[Hou Yanhui, Li Guangqiang, Liu Zhiyi, Fan Xi’an. Study on the Strengthening Mechanism of Al-Cu-Mg-Ag Alloy with the Valence Electron Structures and Atomic Bonding of Precipitates[J]. Rare Metal Materials and Engineering,2011,40(3):407~412.]
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  • 收稿日期:2010-03-26
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