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

Yulan Li, Shenyang Hu, Xin Sun, Fei Gao, Charles H. Henager, Mohammad Khaleel

Research output: Contribution to journalArticle

5 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)856-865
Number of pages10
JournalScience China: Physics, Mechanics and Astronomy
Volume54
Issue number5
DOIs
Publication statusPublished - 1 May 2011

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Keywords

  • interstitials
  • phase-field model
  • radiation
  • vacancies
  • void swelling

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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