Model-based simulation of normal grain growth in a two-phase nanostructured system |
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| Authors: | Y.G. Zheng Y.-W. Mai H.W. Zhang Z. Chen |
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| Affiliation: | 1. State Key Laboratory of Structure Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian, 116024, PR China;2. Centre for Advanced Materials Technology (CAMT), School of Aerospace, Mechanical and Mechatronic Engineering J07, The University of Sydney, Sydney, NSW 2006, Australia;3. Centre for Advanced Materials Technology (CAMT), School of Aerospace, Mechanical and Mechatronic Engineering J07, The University of Sydney, Sydney, NSW 2006, Australia;4. Department of Civil and Environmental EngineeringUniversity of Missouri-Columbia, Columbia, MO 65211-2200, USA |
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| Abstract: | AbstractTo systematically study normal grain growth in a two-phase volume-conserved system, a modified Potts model is proposed, in which the driving forces for grain boundary migration are the interfacial energy between two phases and the boundary energy inside each phase. Model-based simulation results show that the grain growth kinetics follows a power law with a temperature-independent exponent and that the normalized grain size distribution is lognormal and time invariant. Also, a simple theoretical model is used to predict the potential microstructure in a two-phase system due to the competition between interfacial and grain boundary energies. A critical ratio (~2.6) of the grain boundary energy to the interfacial energy is found for a common two-phase system. |
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| Keywords: | Grain growth Potts model Monte Carlo simulation Nanostructured materials |
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