Modelling of irradiation-induced hardening in metals using dislocation dynamics

A new simulation technique (three-dimensional dislocation dynamics) enabling the capture of a hardening effect in metals due to irradiation is reported. When bombarded with high-energy particles, metals accrue internal damage. In irradiated Pd, for example, damage takes the form of interstitial loop...

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Bibliographic Details
Published in:Philosophical magazine letters 2001-09, Vol.81 (9), p.583-593
Main Authors: Khraishi, T.A., Zbib, H.M., de la Rubia, T. Diaz, Victoria, M.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Physics
Radiation treatment (particle and electromagnetic)
Radiation treatments
Treatment of materials and its effects on microstructure and properties
Tribology and hardness
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Summary:A new simulation technique (three-dimensional dislocation dynamics) enabling the capture of a hardening effect in metals due to irradiation is reported. When bombarded with high-energy particles, metals accrue internal damage. In irradiated Pd, for example, damage takes the form of interstitial loops. Such loops are nano-sized and typically have a high number density. The stress field of a loop is given from dislocation theory. It is shown here the hardening is due to the elastic interaction of gliding dislocations with a high number of spatially dispersed interstitial loops. Results are found to correlate well with experiments.
ISSN:0950-0839
1362-3036
DOI:10.1080/09500830110069297