Oxidation and corrosion effects on thermal fatigue behaviour of hot work tool steel X38CrMoV5 (AISI H11)

Abstract : Effects of atmosphere and specimen geometry on thermal fatigue (TF) crack initiation and propagation in a low Si content hot work tool steel X38CrMoV5‐47HRC were investigated. The TF specimen's geometry enhances the uni‐axial IT loading conditions. A high frequency induction heating (3 to 4 MHz) is used. A new TF rig, working under air and/or inert atmosphere with reduced Po(2) has been set up, The reduction of Po(2) results in localized oxidation sites. Whatever geometry and atmosphere conditions, TF cracks initiate exclusively in the oxide layers. Damage mechanisms are environment dependant. Under laboratory air, parallel macroscopic cracks initiate perpendicular to the hoop stress. Under argon and nitrogen, SEM surface observations show that initiated cracks coalesce by zigzagging along crystallographic paths between non‐oxidized zones. In‐depth crack propagation mechanism is mainly trans‐granular. TF crack initiation life under air and in presence of Fe‐Al intermetallics is decreased in comparison to inert atmosphere.
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Conference papers
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https://hal.archives-ouvertes.fr/hal-01678810
Contributor : Imt Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Submitted on : Tuesday, January 9, 2018 - 1:54:10 PM
Last modification on : Tuesday, May 28, 2019 - 9:06:41 AM

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  • HAL Id : hal-01678810, version 1

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Pascal Lamesle, Mehdi Salem, Sabine Le Roux, Gilles Dour, Farhad Rezai-Aria. Oxidation and corrosion effects on thermal fatigue behaviour of hot work tool steel X38CrMoV5 (AISI H11). HTCPM 2008 - 7th International Symposium on High Temperature Corrosion and Protection of Materials, May 2008, Les Embiez, France. 7 p. ⟨hal-01678810⟩

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