Metall. Res. Technol.
Volume 118, Number 2, 2021
|Number of page(s)||8|
|Published online||19 March 2021|
Identification of crystal plasticity parameters for a non-irradiated and irradiated A508 bainite steel
Department of Civil Engineering, Vinh University,
182 Le Duan,
2 Mines Paristech, Centre des Matériaux, CNRS UMR 7633, 91003 Évry, France
3 Normandie Univ, UNIROUEN, INSA Rouen, CNRS, Groupe de Physique des Matériaux, 76000 Rouen, France
4 Université Paris-Saclay, CEA, SRMA, 91191 Gif-sur-Yvette, France
Accepted: 26 January 2021
This paper presents the identification of dislocation-density-based crystal plasticity parameters for a A508 Cl3 bainite steel in non-irradiated and irradiated states and at different temperatures. The representative volume element for the identification process is a cube containing 1000 steel grains represented by a Voronoi mosaic discretized by finite elements. The grains are assigned crystallographic orientations corresponding to an isotropic texture. The crystal constitutive model is based on a plastic flow law, a hardening law, and a law of evolution of dislocation densities. Modeling parameters are determined by a two-step calculation with two different crystal structures: (1) using a simple structure with 343 identical grains to identify 7 parameters, (2) using a Voronoi tessellation of 1000 grains to refine the parameters. Thereafter, the calculated stress-strain curves are compared with experimental stress-strain curves. The results show that the simulated stress-strain curves are in good agreement with those of experiments, highlighting the reliability of the proposed procedure to account for the significant effects of irradiation and temperature.
Key words: parameters identification / crystal plasticity / microstructure / A508 bainite steel / irradiation
© EDP Sciences, 2021
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