Atom probe tomography investigation of assisted precipitation of secondary hardening carbides in a medium carbon martensitic steels

Abstract : A medium carbon martensitic steel containing nanometer scale secondary hardening carbides and intermetallic particles is investigated by field ion microscopy and atom probe tomography. The interaction between the concomitant precipitations of both types of particles is investigated. It is shown that the presence of the intermetallic phase affects the nucleation mechanism and the spatial distribution of the secondary hardening carbides, which shifts from heterogeneous on dislocations to heterogeneous on the intermetallic particles.
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F. Danoix, R. Danoix, J. Akre, A. Grellier, Denis Delagnes. Atom probe tomography investigation of assisted precipitation of secondary hardening carbides in a medium carbon martensitic steels. Journal of Microscopy, Wiley, 2011, 244 (3), pp.305-310. ⟨10.1111/j.1365-2818.2011.03537.x⟩. ⟨hal-01715078⟩

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