Evolution kinetics of interstitial loops in irradiated materials: A phase-field model

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

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Interstitial loops are one of the principal evolving defects in irradiated materials. The evolution of interstitial loops, including spatial and size distributions, affects both vacancy and interstitial accumulations in the matrix, hence, void formation and volumetric swelling. In this work, a phase-field model describing the growth kinetics of interstitial loops in irradiated materials during aging is developed. The diffusion of vacancies and interstitials and the elastic interaction between interstitial loops and point defects are accounted in the model. The effects of interstitial concentration, chemical potential, and elastic interaction on the growth kinetics and stability of interstitial loops are investigated in two and three dimensions. It is found that the elastic interaction enhances the growth kinetics of interstitial loops. The elastic interaction also affects the stability of a small interstitial loop adjacent to a larger loop. The model predicts linear growth rates for interstitial loops that is in agreement with the previous theoretical predictions and experimental observations.

Original languageEnglish
Article number015011
JournalModelling and Simulation in Materials Science and Engineering
Volume20
Issue number1
DOIs
Publication statusPublished - 1 Jan 2012
Externally publishedYes

Fingerprint

Phase Field Model
Growth kinetics
interstitials
Kinetics
Vacancies
kinetics
Chemical potential
Point defects
Spatial distribution
Swelling
Aging of materials
Vacancy
Interaction
Defects
aging (materials)
Point Defects
interactions
Chemical Potential
Voids
Spatial Distribution

ASJC Scopus subject areas

  • Modelling and Simulation
  • Condensed Matter Physics
  • Materials Science(all)
  • Mechanics of Materials
  • Computer Science Applications

Cite this

Evolution kinetics of interstitial loops in irradiated materials : A phase-field model. / Hu, Shenyang; Henager, Charles H.; Li, Yulan; Gao, Fei; Sun, Xin; Khaleel, Mohammad A.

In: Modelling and Simulation in Materials Science and Engineering, Vol. 20, No. 1, 015011, 01.01.2012.

Research output: Contribution to journalArticle

Hu, Shenyang ; Henager, Charles H. ; Li, Yulan ; Gao, Fei ; Sun, Xin ; Khaleel, Mohammad A. / Evolution kinetics of interstitial loops in irradiated materials : A phase-field model. In: Modelling and Simulation in Materials Science and Engineering. 2012 ; Vol. 20, No. 1.
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