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Phase-field Modeling of the Influence of Elastic Field on the Nucleation and Microstructure Evolution in Precipitation
A phase-field method was employed to study the influence of elastic field on the nucleation and microstructure evolution. Two kinds of nucleation process were considered: one using fixed nucleation probability and the other calculated from the classical nucleation theory. In the latter case, the simulated results show that the anisotropic elastic strain field yields significant effects on the behavior of nucleation. With a large lattice misfit between the matrixes and the precipitates, the nucleation process does not appear fully random but displays some spatial correlation and has a preference for the elastic soft direction. However, with a small lattice misfit, this bias does not look quite clean On the contrary, in the case of fixed nucleation probability, the elastic field has no influence on the nucleation process. The lattice mismatch also exerts influences on the microstructure morphology: with lattice mismatch becoming larger, the microstructure proves to align along the elastic soft direction.
作 者： ZHANG Yu-xiang WANG Jin-cheng YANG Yu-juan YANG Gen-cang ZHOU Yao-he 作者单位： State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China 刊 名： 中国航空学报(英文版) ISTIC 英文刊名： CHINESE JOURNAL OF AERONAUTICS 年，卷(期)： 2007 20(2) 分类号： V2 关键词： elastic field nucleation phase-field method precipitation【Phase-field Modeling of the Influenc】相关文章：
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