Irradiation hardening by interstitial loops: atomistic study and micromechanical model

D. Rodney, G. Martin, Y. Bréchet

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We present molecular dynamics simulations of the interactions between glissile interstitial loops and an edge dislocation in a fee nickel crystal. This study shows atomic-scale reactions leading to a pinning of the dislocation by the loops which are dragged along when the dislocation unpinns. This atomic-scale information is incorporated in a micromechanical model. Predictions of the model at the micron scale are compared to the initial hardening and subsequent softening of irradiated specimens observed experimentally in traction tests.

Original languageEnglish
Pages (from-to)198-202
Number of pages5
JournalMaterials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
Publication statusPublished - 15 Jul 2001
Externally publishedYes


  • Atomistic study
  • Interstitial loops
  • Micromechanical model

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