AnT²COK, an analytical model for cyclic oxidation kinetics of hot-work tool steels in transient thermal cycling conditions - Archive ouverte HAL Access content directly
Journal Articles Corrosion Science Year : 2019

AnT²COK, an analytical model for cyclic oxidation kinetics of hot-work tool steels in transient thermal cycling conditions

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1
Mehdi Salem
Sabine Le Roux
Damien Texier
Pascal Lamesle
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  • PersonId : 762052
  • IdRef : 14421735X
Farhad Rezai-Aria

Abstract

In hot forming processes, steel tools are subjected to rapid temperature transients and cyclic oxidation. AnT²COK, a new analytical model based on diffusion-controlled oxide growth in cyclic conditions, is proposed to predict the parabolic oxidation kinetics in spallation-free conditions. Compared to cyclic oxidation models of the literature (COREST, COSP, DICOSM, etc.), it is applicable for any shape of thermal cycle, fully transient or with dwell time. The model is applied to thermal fatigue tests on X38CrMoV5 steel, for Tmax between 500 and 685 °C. Its validity is demonstrated above 550 °C, using frequency factor and activation energy calculated from isothermal tests.
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Dates and versions

hal-01944220 , version 1 (04-12-2018)

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Gilles Dour, Mehdi Salem, Sabine Le Roux, Damien Texier, Farid Medjedoub, et al.. AnT²COK, an analytical model for cyclic oxidation kinetics of hot-work tool steels in transient thermal cycling conditions. Corrosion Science, 2019, 147, pp.169-181. ⟨10.1016/j.corsci.2018.11.009⟩. ⟨hal-01944220⟩
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