Behaviour of dislocations near phaseboundaries in the anisotropiclinear elasticity theory

Type : Article de conférence
Auteur(s) :  A.Ouchtati, O.Khalfallah
Année :  2016
Domaine : Sciences des matériaux
Conférence: 7th African Conference on Non Destructive Testing (ACNDT) & the 5th International Conference on NDT and Materials Industry and Alloys (IC-WNDT-MI)
Lieu de la conférence:  Oran, Algeria
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés :  nterphase Boundary, Dislocation, Elastic Interaction, Image Force, Anisotropic elasticity, CFC Structure.

Résumé : 

The image force undergone by amatrix dislocations close and parallel to aninterphase boundary is studied in Ag-X bicrystalswith X : Pb, Cu and Ni for disorientations rangingbetween 0° and 90°. The elastic energy of dislocationboundaryinteraction is calculated within theframework of anisotropic linear elasticity. It isrelated to the difference of the two metals shearmoduli. It is about a few hundred pico Joule permeter. The image force can be repulsive or attractiveaccording to the sign and the intensity of shearmoduli difference. The isoenergy maps have varioussymmetries according to the disorientation.