Open Access

ARTICLE

Numerical Simulation of Radiation-Induced Chemical Segregation and Phase Transformation in a Binary System

by Efraín Hernández-Rivera¹, Veena Tikare¹, Lumin Wang²

1 Advanced Nuclear Energy Programs, Sandia National Laboratories, Albuquerque, NM, USA.
2 Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI, USA.

Computers, Materials & Continua 2013, 38(2), 91-103. https://doi.org/10.3970/cmc.2013.038.091

Abstract

We present the development of a hybrid Monte Carlo-phase field model that is able to simulate radiation induced chemical segregation and the corresponding phase transformation and nano-structure evolution. Under irradiation by a lowenergy ion beam, defects (vacancies) are created and accumulate. In a binary crystalline material, AB, studied in this work, these defects are of the two types A and B and diffuse at different rates. These differential diffusivities are sufficient driving mechanisms for the formation of chemically distinct regions with accompany changes in phases and nano-structure. In this work, we present a model that can simulate these changes by treating the differential diffusion of the vacancies of the two components.

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Keywords

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