The analysis of phase decomposition was carried out using the nonlinear and linear Cahn-Hilliard equations in a hypothetical A-B alloy system with a miscibility gap. These equations were solved by the explicit finite difference method assuming a regular solution model. The supersaturated solid solution and decomposed phases were considered to have an fcc structure. Different aging temperatures and thermodynamic interaction parameters OA-B were used to simulate different alloy systems. The numerical simulation results showed that the growth kinetics of phase decomposition in the alloy with 30at.% A was slower than that of 50 at.% A. Additionally, the start time and modulation wavelength of phase decomposition are strongly affected by the thermodynamic interaction parameter OA-B value. The numerical simulation results showed that the growth kinetics of phase decomposition with the linear equation is slower than that with the nonlinear one. © 2013.
CITATION STYLE
Lezama-Alvarez, S., Avila-Davila, E. O., Lopez-Hirata, V. M., & Gonzalez-Velazquez, J. L. (2013). Numerical analysis of phase decomposition in a-b binary alloys using cahn-hilliard equations. Materials Research, 16(5), 975–981. https://doi.org/10.1590/S1516-14392013005000080
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