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Fatigue intrusion-extrusion in a fully pearlitic steel

Abstract : The aim of this paper is to identify the location of fatigue extrusions and intrusions, the latter being the precursor of short microcracks in a fully pearlitic steel. The material contains a huge amount of interfaces, as it consists of α -ferrite bands separated by Fe3C cementite lamellae. Fe3C cementite remained inactive while cyclic plasticity occurred in α -ferrite bands. Both intrusions and extrusions formed in the interior of the α -ferrite bands. Unlike other materials, intrusion did not nucleate at the interface between α -ferrite and Fe3C cementite. The coherency of the interface is suspected to be responsible for this shift.
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Contributeur : Lilloa Université de Lille <>
Soumis le : mercredi 26 février 2020 - 13:25:20
Dernière modification le : mardi 17 mars 2020 - 03:25:41




Jean-Bernard Vogt, Isadora Costa, Ahmed Addad, Jeremie Bouquerel. Fatigue intrusion-extrusion in a fully pearlitic steel. Materials Letters, Elsevier, 2020, Materials Letters, pp.127539. ⟨10.1016/j.matlet.2020.127539⟩. ⟨hal-02491793⟩



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