Alloying-element interactions with austenite/martensite interface during quenching and partitioning of a model Fe-C-Mn-Si alloy

Abstract : The alloying elements partitioning from martensite to austenite during quenching and partitioning was analysed by coupling in situ High Energy X-Ray Diffraction experiments and 3D atom probe tomography. A rapid and significant carbon partitioning from martensite to austenite without any partitioning of both Mn and Si was highlighted while the interface was immobile. After a relatively short time at 400 °C, a clear Mn partitioning occurs at the vicinity of the α′/γ interface. The analysis conducted indicates that manganese equilibrates its chemical potential during partitioning and raises the issue of the Constrained Carbon Equilibrium model applicability throughout the partitioning process.
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Submitted on : Wednesday, December 5, 2018 - 2:36:03 PM
Last modification on : Wednesday, February 13, 2019 - 5:20:06 PM

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Mohamed Gouné, Samy Aoued, Frédéric Danoix, Guillaume Geandier, Angéline Poulon-Quintin, et al.. Alloying-element interactions with austenite/martensite interface during quenching and partitioning of a model Fe-C-Mn-Si alloy. Scripta Materialia, Elsevier, 2019, 162, pp.181-184. ⟨10.1016/j.scriptamat.2018.11.012⟩. ⟨hal-01945700⟩

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