Print Email Facebook Twitter The role of silicon in carbon partitioning processes in martensite/austenite microstructures Title The role of silicon in carbon partitioning processes in martensite/austenite microstructures Author Kim Lee, B.N. (TU Delft (OLD) MSE-3) Sietsma, J. (TU Delft (OLD) MSE-3) Santofimia, Maria Jesus (TU Delft (OLD) MSE-3) Date 2017 Abstract Understanding carbon redistribution in steels is crucial in developing advanced high strength steels. For instance, Quenching & Partitioning (Q&P) processes rely on the partitioning of carbon from martensite into austenite, where at the end of the heat treatment the carbon-enriched austenite shows higher stability at room temperature. Recent literature gives increasing evidence of carbide precipitation occurring during partitioning despite the addition of silicon, conventionally thought to suppress carbide precipitation. The aim of the present study is to gain insight into carbon-competing processes by applying a series of Q&P heat treatments, with particular focus on the partitioning stage, where the role of silicon in the stability of austenite is evaluated. Various characterisation techniques are combined in order to unveil the microstructural changes. While carbide precipitation does appear to occur in the presence of silicon, it is found that silicon plays an active role in the stabilisation of the austenite during the partitioning reaction. Subject Atom probe tomography (APT)Austenite stabilityCarbonMartensiteX-ray diffraction (XRD) To reference this document use: http://resolver.tudelft.nl/uuid:30c598a1-e4bd-4cfd-a7fd-bb0e191b274c DOI https://doi.org/10.1016/j.matdes.2017.04.080 ISSN 0264-1275 Source Materials & Design, 127, 336-345 Part of collection Institutional Repository Document type journal article Rights © 2017 B.N. Kim Lee, J. Sietsma, Maria Jesus Santofimia Files PDF 1_s2.0_S0264127517304379_main.pdf 2.54 MB Close viewer /islandora/object/uuid:30c598a1-e4bd-4cfd-a7fd-bb0e191b274c/datastream/OBJ/view