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Validation of void growth models using X-ray microtomography characterization of damage in dual phase steels / C. Landron in Acta materialia, Vol. 59 N° 20 (Décembre 2011) 

Public ISBD [article]  in Acta materialia > Vol. 59 N° 20 (Décembre 2011) . - pp. 7564–7573 Titre : Validation of void growth models using X-ray microtomography characterization of damage in dual phase steels Type de document : texte imprimé Auteurs : C. Landron, Auteur ; E. Maire, Auteur ; O. Bouaziz, Auteur Année de publication : 2012 Article en page(s) : pp. 7564–7573 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Steel  Dual  phase  Damage  X-ray  tomography  Modeling Résumé : In situ tensile tests were carried out during X-ray microtomography imaging of three steels: a single phase ferritic steel, a dual phase steel and a fully martensitic steel. Cavity growth was first quantified in the different samples as a function of strain and triaxiality. The Rice and Tracey model, a version of this model corrected by Huang, and a third version accounting for the cavity shape were then used to predict void growth evolution. It was experimentally demonstrated that for steels Huang’s correction is a real improvement to the original Rice and Tracey model. Some differences in the void growth kinetic are discussed, accounting for the microstructure and the mechanical behavior of each steel. ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645411006239 [article] Validation of void growth models using X-ray microtomography characterization of damage in dual phase steels [texte imprimé] / C. Landron, Auteur ; E. Maire, Auteur ; O. Bouaziz, Auteur . - 2012 . - pp. 7564–7573. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 59 N° 20 (Décembre 2011) . - pp. 7564–7573 Mots-clés : Steel  Dual  phase  Damage  X-ray  tomography  Modeling Résumé : In situ tensile tests were carried out during X-ray microtomography imaging of three steels: a single phase ferritic steel, a dual phase steel and a fully martensitic steel. Cavity growth was first quantified in the different samples as a function of strain and triaxiality. The Rice and Tracey model, a version of this model corrected by Huang, and a third version accounting for the cavity shape were then used to predict void growth evolution. It was experimentally demonstrated that for steels Huang’s correction is a real improvement to the original Rice and Tracey model. Some differences in the void growth kinetic are discussed, accounting for the microstructure and the mechanical behavior of each steel. ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645411006239