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]
< Reduce
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Groupe de physique des matériaux [GPM]
Language
en
Article de revue
This item was published in
Materials. 2018-07, vol. 11, n° 7, p. 1087 (11 p.)
MDPI
English Abstract
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 ...Read more >
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.Read less <
English Keywords
steel
Q&P
transition carbide
precipitation
HEXRD
TEM
steel
ANR Project
Design des Alliages Métalliques pour Allègement des Structures
Origin
Hal imported