Experimental study and micromechanical modelling of the effective elastic properties of Fe–TiB2 composites

Khaoula Dorhmi (1) , Katell Derrien (1) , Zehoua Hadjem-Hamouche (1) , Léo Morin (2, 1) , Frédéric Bonnet (3) , Jean-Pierre Chevalier (1, 4)

1 PIMM - Laboratoire Procédés et Ingénierie en Mécanique et Matériaux
2 IRMAR - Institut de Recherche Mathématique de Rennes
3 ArcelorMittal Maizières Research SA
4 UMR GESTE - Gestion Territoriale de l'Eau et de l'environnement

The aim of this paper is to investigate the effective properties of Fe–TiB2 composites obtained after hot or cold rolling. The elastic moduli of both hot and cold rolled composites are measured experimentally using several methods. Microstructure analyses based on SEM observations are performed to characterize the distribution of particles and cracks, and are then used to generate 3D representative microstructures using the RSA method. This allows the numerical determination of the overall elastic behavior of Fe–TiB2 composites using full-field FFT-based simulations. In addition, Young’s moduli of the hot rolled Fe–TiB2 composites are also determined analytically using the mean-field homogenization scheme of Mori–Tanaka. The elastic properties determined experimentally, analytically and numerically are in a good agreement. Overall, a significant improvement of the specific stiffness in comparison to standard steels is achieved irrespective of the processing conditions

Mots clés: Civil and Structural Engineering; Ceramics and Composites; Fe–TiB2composites; Homogenization; Effective properties; FFT‐based simulations; Mori–Tanaka

Domaines: Sciences de l'ingénieur [physics]

Khaoula Dorhmi, Katell Derrien, Zehoua Hadjem-Hamouche, Léo Morin, Frédéric Bonnet, et al.. Experimental study and micromechanical modelling of the effective elastic properties of Fe–TiB2 composites. Composite Structures, 2021, 272, pp.114122. ⟨10.1016/j.compstruct.2021.114122⟩. ⟨hal-03287409⟩