Carbon enrichment of austenite and carbide precipitation during martensitic transformation have been investigated in three novel low-carbon steels. Significant partitioning of carbon into retained austenite was observed in the final microstructure, because of the relatively high martensite-start temperatures. The fact that the autotempering is associated with very fine cementite precipitates within the martensite probably helps in achieving the observed ductility in spite of the high-strength when compared with reported data on the tensile properties of quenched martensitic steels.
Proceedings of International Conference on Martensitic Transformations (ICOMAT-2008), eds G. B. Olson, D. S. Lieberman and A. Saxena, TMS, Pennsylvania, USA, 2009, 179-185.
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