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Role of microstructure and residual stresses on fatigue crack initiation of carbonitrided steels

type de publication      article dans une revue internationale avec comité de lecture
date de publication 1989
auteur(s) Lesage Jacky; Chicot Didier; Al Karaishi M.
journal (abréviation) Steel Research (SR)
volume (numéro) 60 (8)
  
pages 370 – 374
résumé In this paper, the role of microstructure and residual stresses on fatigue crack initiation of gaseous carbonitrided steels is examined. Optimum for austenite content in the case is investigated for microstructure containing bainite and for those without bainite. Fractographic study suggests subsurface initiation sites for notched specimens when austenite content is high and initiation sites at the surface when austenite is low.
mots clés Fatigue, Initiation sites, Austenite content
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