Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/19250
Title: Phase field simulation of grain growth in presence of second phase particles
Authors: ASHIS MALLICK
Keywords: Phase field, grain growth, mobile second phase particles
Issue Date: 2-Apr-2009
Source: ASHIS MALLICK (2009-04-02). Phase field simulation of grain growth in presence of second phase particles. ScholarBank@NUS Repository.
Abstract: Prediction of nucleation, grain growth, and concomitant microstructure in polycrystalline materials is of great technological importance because the size, shape, and the orientation of grains have a significant effect on the mechanical properties of materials. We first experimentally investigate the effect of grain size - ranging from nano to micron sizes - on the mechanical behaviour of a Magnesium alloy. Next we construct a theoretical model for the interaction of mobile second phase particles with a grain boundary. For more realistic polycrystalline grain growth in the presence of mobile particles, we develop a computational approach using phase field theory. Our phase field simulation for bicrystal grain growth in presence of particles shows the effect of size and the mobility of particle on the kinetics of grain boundary. In a polycrystalline system with particles, the grain growth is retarded due to the presence of particles. The average grain size as function of simulation time depends on the size, volume fraction, and mobility of the particles present.
URI: http://scholarbank.nus.edu.sg/handle/10635/19250
Appears in Collections:Ph.D Theses (Open)

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