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包含共格畸變的立方合金沉淀機(jī)制的計算機(jī)模擬
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TG111.5

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國家自然科學(xué)基金資助項目(50071046);國家863資助項目(2002AA331051)


Computer Simulation for the Precipitation Mechanism of the Cubic Alloy Including Coherent Strain Energy
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    摘要:

    利用包含共格畸變能的微觀擴(kuò)散方程對立方合金的沉淀過程進(jìn)行計算機(jī)模擬。結(jié)果表明:共格畸變阻礙了過渡區(qū)合金沉淀過程的進(jìn)行,隨共格畸變能的增大,沉淀相分布的取向性越來越明顯,由原來離散分布的等軸粒子狀向橢片狀轉(zhuǎn)變??拷邼舛群辖鸬倪^渡區(qū)合金,隨共格畸變能的增大,其沉淀機(jī)制由非經(jīng)典形核長大和大穩(wěn)分解的混合特征逐漸向非經(jīng)典形核長大型的沉淀特征轉(zhuǎn)變。

    Abstract:

    The precipitation process simulation of the medial density cubic alloy was conducted using the microscopic diffusion equation including the coherent strain energy, The results show that the coherent strain energy hinder the precipitation process of the alloy. With the increase of coherent strain energy, the arrangement orientation increase, from spherical-shaped precipitates to elliptical plate. With the increase of coherent strain energy, the precipitation mechanism of medial composition alloys near the high density alloys are changing from the mixture processes which possessed the characteristics of both non-classical nucleation growth and spinodal decomposition mechanisms to the processes which possessed only the characteristics of non-classical nucleation growth.

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盧艷麗 陳錚 李永勝 王永欣 褚忠.包含共格畸變的立方合金沉淀機(jī)制的計算機(jī)模擬[J].稀有金屬材料與工程,2005,34(8):1205~1208.[Lu YanLi;Chen Zheng;Li YongSheng;Wang YongXin;Chu Zhong. Computer Simulation for the Precipitation Mechanism of the Cubic Alloy Including Coherent Strain Energy[J]. Rare Metal Materials and Engineering,2005,34(8):1205~1208.]
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  • 收稿日期:2004-05-13
  • 最后修改日期:2005-06-03
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