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Article Dans Une Revue Materials Letters Année : 2018

Carbon diffusivity and kinetics of spinodal decomposition of martensite in a model Fe-Ni-C alloy

Résumé

From direct observations and measurements at the atomic scale by atom probe tomography coupled with calculations using a mean-field approach, the kinetics of low temperature carbon redistribution in martensite of a Fe-Ni-C alloy was investigated for duration up to 4.5 years. The results suggest that the ordered phase α″-Fe16C2 forms via a spinodal decomposition mechanism, in the range of a few days at room-temperature. The approach proposed allows us to retrieve the diffusivity of carbon in a large composition range during decomposition kinetics of martensite into α-Fe and α″-Fe16C2.
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Dates et versions

hal-01718168 , version 1 (27-02-2018)

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Philippe Maugis, Fréderic Danoix, Myriam Dumont, Sergiu Curelea, Sophie Cazottes, et al.. Carbon diffusivity and kinetics of spinodal decomposition of martensite in a model Fe-Ni-C alloy. Materials Letters, 2018, 214, pp.213-216. ⟨10.1016/j.matlet.2017.12.007⟩. ⟨hal-01718168⟩
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