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.
|Number of pages||5|
|Journal||Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing|
|Publication status||Published - 15 Jul 2001|
- Atomistic study
- Interstitial loops
- Micromechanical model