Phase-field modeling of void evolution and swelling in materials under irradiation

  • YuLan Li
  • ShenYang Hu
  • Xin Sun
  • Fei Gao
  • Charles H. HenagerJr
  • Mohammad Khaleel
Research Paper Multiscale Modeling & Simulation of Materials

DOI: 10.1007/s11433-011-4316-y

Cite this article as:
Li, Y., Hu, S., Sun, X. et al. Sci. China Phys. Mech. Astron. (2011) 54: 856. doi:10.1007/s11433-011-4316-y

Abstract

Void swelling is an important phenomenon observed in both nuclear fuels and cladding materials in operating nuclear reactors. In this work we develop a phase-field model to simulate void evolution and void volume change in irradiated materials. Important material processes, including the generation of defects such as vacancies and self-interstitials, their diffusion and annihilation, and void nucleation and evolution, have been taken into account in this model. The thermodynamic and kinetic properties, such as chemical free energy, interfacial energy, vacancy mobility, and annihilation rate of vacancies and interstitials, are expressed as a function of temperature and/or defect concentrations in a general manner. The model allows for parametric studies of critical void nucleus size, void growth kinetics, and void volume fraction evolutions. Our simulations demonstrated that void swelling displays a quasi-bell shape distribution with temperature often observed in experiments.

Keywords

radiation void swelling vacancies interstitials phase-field model 

Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • YuLan Li
    • 1
  • ShenYang Hu
    • 1
  • Xin Sun
    • 1
  • Fei Gao
    • 1
  • Charles H. HenagerJr
    • 1
  • Mohammad Khaleel
    • 1
  1. 1.Pacific Northwest National LaboratoryRichlandUSA

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