In Situ Structural Evolution of Steel-Based MMC by High Energy X-Ray Diffraction and Comparison with Micromechanical Approach - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue Journal of heat treatment and materials Année : 2014

In Situ Structural Evolution of Steel-Based MMC by High Energy X-Ray Diffraction and Comparison with Micromechanical Approach

Moukrane Dehmas
O. Martin
  • Fonction : Auteur
N. Karnatak
  • Fonction : Auteur

Résumé

In situ high energy X-ray diffraction synchrotron was used to provide direct analysis of the transformation sequences in steel-based matrix composite (MMC) reinforced with TiC particles elaborated by powder metallurgy. Evolution of the phase fractions of the matrix and TiC particles as well as the mean cell parameters of each phase were determined by Rietveld refinement from high energy X-ray diffraction (ID15B, ESRF, Grenoble, France). In addition some peaks were further analysed in order to obtain the X-Ray strain during the cooling step. Non-linear strain evolutions of each phase are evidenced which are either associated with differences in the coefficient of thermal expansion (CTE) between matrix and TiC particle or to the occurrence of phase transformation. Micromechanical calculations were performed using the finite element method to estimate the stress state in each phase and outline the effects of differences in CTE and those of volume change associated with the matrix phase transformation. The calculated results led to a final compressive hydrostatic stress in the TiC reinforcement and tensile hydrostatic stress in the matrix area around the TiC particles. Besides, the tendencies measured from in situ synchrotron diffraction (mean cell parameters) matched well with the numerical estimates

Domaines

Matériaux
Fichier non déposé

Dates et versions

hal-01293576 , version 1 (25-03-2016)

Identifiants

Citer

Guillaume Geandier, Moukrane Dehmas, Mickaël Mourot, Elisabeth Aeby-Gautier, Sabine Denis, et al.. In Situ Structural Evolution of Steel-Based MMC by High Energy X-Ray Diffraction and Comparison with Micromechanical Approach. Journal of heat treatment and materials, 2014, 69 (1), pp.54-59. ⟨10.3139/105.110206⟩. ⟨hal-01293576⟩
79 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More