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

作者：Hernandez Rivera Efrain^*; Tikare Veena; Wang Lumin

来源：Computers Materials & Continua, 2013, 38(2): 91-103.

• chemical segregation
• Monte Carlo
• phase field
• phase transformation

We present the development of a hybrid Monte Carlo-phase field model. This model is able to simulate radiation induced chemical segregation and the corresponding phase transformation and nano-structure evolution. Under irradiation by a low-energy 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.

• 出版日期2013-11