Title :

A 3D crystal plasticity model for coherency loss during precipitation

Author(s) :

Oum, G [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Thuinet, Ludovic [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Legris, Alexandre [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]

Journal title :

Modelling and Simulation in Materials Science and Engineering

Volume number :

26

Pages :

65008

Publication date :

2018-07-20

HAL domain(s) :

Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]

English abstract : [en]

A 3D crystal plasticity model dedicated to coherency loss occurring during precipitation is proposed. It relies on (i) the calculation of an effective stress-free strain resulting from the modification of the stress-free ...
Show more >A 3D crystal plasticity model dedicated to coherency loss occurring during precipitation is proposed. It relies on (i) the calculation of an effective stress-free strain resulting from the modification of the stress-free strain of the perfectly coherent precipitate due to the presence of interfacial misfit dislocations and (ii) the propagation of the nucleated dislocations inside the matrix. With this approach, it is possible to estimate separately the importance of each contribution (i) and (ii) on the resulting stress around the precipitate and it is shown that none of them can be neglected to correctly estimate the relaxed stress. Numerical results of the model are compared to experiments in the case of γ hydride precipitation in zirconium and a good agreement is obtained concerning the proportion of coherency stress relieved plastically. This type of model can be easily generalized to incorporate any glide systems and coupled to phase-field models in order to study the effect of coherency loss on microstructure evolution.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
ENSCL
CNRS
INRA

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Métallurgie Physique et Génie des Matériaux

Submission date :

2019-05-17T09:25:04Z
2023-11-15T16:17:38Z