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Ni-Al合金中沉淀相Ni3Al相互關(guān)系的微觀相場模擬
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Microscopic Phase-Field Simulation for Correlations of Ni3Al Precipitates in Ni-Al Alloys
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Supported by the National Natural Science Foundation of China(50671084); China Postdoctoral Science Foundation (20070420218); Natural Science Foundation of Shaanxi Province

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    摘要:

    基于微觀相場動力學(xué)模型和微觀彈性理論，研究了Ni-Al合金中沉淀相Ni3Al(g￠)形貌演化、體積分?jǐn)?shù)以及鋁濃度對其相互關(guān)系的影響。結(jié)果表明，對于所有濃度的合金，沉淀后期，g￠相均沿著[001]和[010]方向規(guī)則排列，但是彼此之間存在著不同的相互關(guān)系。對于低鋁濃度合金，g￠相之間彼此互相獨(dú)立。對于中鋁濃度的合金，g￠相之間主要存在著4種相互關(guān)系：L-狀，雙透鏡狀，三重組結(jié)構(gòu)和四重組結(jié)構(gòu)。對于高鋁濃度的合金，g￠相之間主要呈現(xiàn)雙透鏡狀關(guān)系

    Abstract:

    The effect of Al concentration on the correlations of Ni3Al precipitates (γ′) in Ni-Al alloys was studied based on the microscopic phase-field kinetic model and the microelasticity theory. The simulation results show that γ′ precipitates are arranged along the [001] and [010] directions regarding alloys with all concentration, but there exists different correlations. For the alloy with lower Al concentration, γ′ precipitates are independent each other; for the alloy with medium Al concentration, there are mainly four types correlations among the γ′ precipitates: L-shaped pattern, doublet pattern, triplet pattern and quartet pattern; for the alloy with higher Al concentration, the correlation of γ′ precipitates is mainly doublet pattern

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盧艷麗,陳 錚,鐘漢文,張 靜. Ni-Al合金中沉淀相Ni3Al相互關(guān)系的微觀相場模擬[J].稀有金屬材料與工程,2009,38(11):1890~1893.[Lu Yanli, Chen Zheng, Zhong Hanwen, Zhang Jing. Microscopic Phase-Field Simulation for Correlations of Ni3Al Precipitates in Ni-Al Alloys[J]. Rare Metal Materials and Engineering,2009,38(11):1890~1893.]
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  • 收稿日期:2008-11-24
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