In situ investigation of the iron carbide precipitation process in a Fe-C-Mn-Si Q&P steel
AOUED, Samy
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Groupe de physique des matériaux [GPM]
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Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Groupe de physique des matériaux [GPM]
AOUED, Samy
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Groupe de physique des matériaux [GPM]
< Réduire
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Groupe de physique des matériaux [GPM]
Langue
en
Article de revue
Ce document a été publié dans
Materials. 2018-07, vol. 11, n° 7, p. 1087 (11 p.)
MDPI
Résumé en anglais
Quenching and Partitioning (Q&P) steels are promising candidates for automotive applications because of their lightweight potential. Their properties depend on carbon enrichment in austenite which, in turn, is strongly ...Lire la suite >
Quenching and Partitioning (Q&P) steels are promising candidates for automotive applications because of their lightweight potential. Their properties depend on carbon enrichment in austenite which, in turn, is strongly influenced by carbide precipitation in martensite during quenching and partitioning treatment. In this paper, by coupling in situ High Energy X-Ray Diffraction (HEXRD) experiments and Transmission Electron Microscopy (TEM), we give some clarification regarding the precipitation process of iron carbides in martensite throughout the Q&P process. For the first time, precipitation kinetics was followed in real time. It was shown that precipitation starts during the reheating sequence for the steel studied. Surprisingly, the precipitated fraction remains stable all along the partitioning step at 400 °C. Furthermore, the analyses enable the conclusion that the iron carbides are most probably eta carbides. The presence of cementite was ruled out, while the presence of several epsilon carbides cannot be strictly excluded.< Réduire
Mots clés en anglais
steel
Q&P
transition carbide
precipitation
HEXRD
TEM
steel
Project ANR
Design des Alliages Métalliques pour Allègement des Structures
Origine
Importé de halUnités de recherche