Phase-field Model for Diffusional Phase Transformations in Elastically Inhomogeneous Polycrystals

被引：1
|
作者：
Heo, Tae Wook [1 ]
Bhattacharyya, Saswata [1 ]
Chen, Long-Qing [1 ]
机构：
[1] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
来源：
SOLID-SOLID PHASE TRANSFORMATIONS IN INORGANIC MATERIALS, PTS 1-2 | 2011年 / 172-174卷
关键词：
Phase transformation; Polycrystals; Inhomogeneous elasticity; Grain boundary segregation; Precipitates; Phase-field model; GRAIN-BOUNDARY SEGREGATION; PRESSED SILICON-CARBIDE; FOURIER-SPECTRAL METHOD; MICROSTRUCTURE EVOLUTION; GROWTH; NUCLEATION; SIMULATION; KINETICS;
D O I：
10.4028/www.scientific.net/SSP.172-174.1084
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A phase-field model is described for predicting the diffusional phase transformation process in elastically inhomogeneous polycrystals. The elastic interactions are incorporated by solving the mechanical equilibrium equation using the Fourier-spectral iterative-perturbation scheme taking into account elastic modulus inhomogeneity. A number of examples are presented, including grain boundary segregation, precipitation of second-phase particles in a polycrystal, and interaction between segregation at a grain boundary and coherent precipitates inside grains. It is shown that the local pressure distribution due to coherent precipitates leads to highly inhomogeneous solute distribution along grain boundaries.
引用
收藏
页码：1084 / 1089
页数：6
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