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合金沉淀相微观组织演化计算机模拟

Computer Simulation of Elastic StrainInduced MorphologicalEvolution of Precipitates

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【Author】 HOU Hua\+1, ZHAO Yuhong\+2, XU Hong\+1, MAO Hongkui\+1 (1. Dept. of Materials Engineering, North China Institute of Technology, Taiyuan 030051, China; 2. Dept. of Materials Science and Engineering, Northwestern Polytechnical University, Xi′an 710072, China)

【机构】华北工学院材料加工工程系；西北工业大学材料科学与工程学院；华北工学院材料加工工程系山西太原030051；陕西西安710072；山西太原030051；山西太原030051；

【摘要】利用微观扩散方程,结合微观弹性力学理论的方法,以25%(溶质原子百分数)的二元模型合金为例,研究了共格畸变对合金沉淀相微观组织形貌的影响.计算机模拟表明:当忽略弹性应变能时,沉淀为随机分布的等轴颗粒,呈各向同性特征;当考虑弹性应变能时,沉淀相趋于沿弹性"软"方向排列,呈各向异性特征.沉淀相沿最优方向长大和粗化.更多还原

【Abstract】 The microscopic diffusion equation combined with the theory of microscopic elasticity was used. The elastic straininduced morphological transformation of a binary model alloy containing 25% (percentage of solute atoms) was simulated. The results show: when the elastic strain energy was neglected, randomly distributed equiaxed particles were obtained with isotropic characteristic; when the elastic strain was considered, precipitates tend to aligned along the elastic \!soft\" directions with anisotropic characteristic. The selectively growth and coarsen of precipitates occur along the optimum directions.更多还原

【关键词】弹性应变能；共格沉淀相；模型合金；计算机模拟；
【Key words】 elastic strain energy； coherent precipitate； model alloy； computer simulation；

【基金】山西省青年科学基金资助项目

【文献出处】华北工学院学报 ,Journal of North China Institute of Technology , 编辑部邮箱 ,2003年04期

【分类号】TG115
【下载频次】77

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