ICAMS / Interdisciplinary Centre for Advanced Materials Simulation


A coupled diffusion phase-field crystal-plasticity framework to study grain boundary cavitation in irradiated materials

Date: 07.05.2013
Time: 02:00 p.m.
Place: ICAMS² 2013, International Colloquium on Advanced Materials Simulation, Bochum, Germany

Aurélien Villani, Ecole des Mines de Paris, Evry Cedex, France
Samuel Forest, CNRS International Associate Lab, Ecole des Mines de Paris, Evry, France
Benoît Appolaire, UMR 104 CNRS – ONERA, Châtillon Cedex, France
Esteban Busso, Ecole des Mines de Paris, Evry Cedex, France

Some of the most deleterious degradation mechanisms in high temperature polycrystalline materials are those caused by the diffusion of point defects (i.e. vacancies or interstitial atoms) through either the crystal lattice or the grain boundary regions, and by their interaction with other lattice defects, such as dislocations and grain boundaries. They can lead to cavitation, local swelling, creep, hardening, and embrittlement due to the formation of point defect clusters, amongst others. A detailed physical understanding of experimental observations and measurements of point defect production, diffusion, and trapping requires appropriate theoretical and modelling tools to study the complex phenomena involved.

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