Les intermétalliques : des superalliages aux quasicristaux
J. Phys. IV France 06 (1996) C2-199-C2-210
Dislocation-Obstacle Interactions and Mechanical Properties of IntermetallicsD. Caillard
CEMES/CNRS, 29 rue Jeanne-Marvig, BP. 4347, 31055 Toulouse, France
The mechanical properties of materials are discussed for different configurations of the obstacles (in series or in parallel), different dislocation-obstacle regimes (exhaustion or crossing) and different obstacle strengths (one type of obstacle or a spectrum of obstacles of different strengths). The models proposed for Ni3Al are compared in what concerns the yield stress anomaly and the partial reversibility of the flow stress upon a decrease of the temperature.
© EDP Sciences 1996