Nucleation of Cr precipitates in Fe–Cr alloy under irradiation

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Institutes & Expert groups

  • UESTC - University of Electronic Science and Technologie of China
  • HHIT - Huaihai Institute of Technology, School of Science
  • CAEP - China Academy of Engineering Physics - Institute of Nuclear Physics and Chemistry

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The nucleation of Cr precipitates induced by overlapping of displacement cascades in Fe–Cr alloys has been investigated using the combination of molecular dynamics (MD) and Metropolis Monte Carlo (MMC) simulations. The results reveal that the number of Frenkel pairs increases with the increasing of overlapped cascades. Overlapping cascades could promote the formation of Cr precipitates in Fe–Cr alloys, as analyzed using short range order (SRO) parameters to quantify the degree of ordering and clustering of Cr atoms. In addition, the simulations using MMC approach show that the presence of small Cr clusters and vacancy clusters formed within cascade overlapped region enhance the nucleation of Cr precipitates, leading to the formation of large Cr dilute precipitates.


Original languageEnglish
Pages (from-to)293-300
Number of pages7
JournalComputational Materials Science
Publication statusPublished - 24 Feb 2015


  • Cr precipitate, Fe–Cr alloys, Cascade overlap, Molecular dynamics, Metropolis Mont Carlo

ID: 3368023