A true-stress creep model based on deformation mechanisms for polycrystalline materials

DOI	Trouver le DOI : https://doi.org/10.1007/s11665-012-0191-6
Auteur	Rechercher : Wu, Xijia¹; Rechercher : Williams, Steve; Rechercher : Gong, Diguang
Affiliation	Conseil national de recherches du Canada. Aérospatiale
Format	Texte, Article
Sujet	creep; creep life prediction; deformation mechanism
Résumé	A true-stress creep model has been developed based on well-recognized deformation mechanisms, i.e., dislocation glide, dislocation climb, and grain boundary sliding. The model provides a physics-based description of the entire creep deformation process with regards to the strain-time history (primary, secondary, and tertiary creep), rupture strain and lifetime, which finds good agreement with experimental observations for Waspaloy. A deformation-mechanism map is constructed for Waspaloy, and a creep failure criterion is defined by the dominant deformation mechanisms leading to intergranular/transgranular fracture. Thus, the model is a self-consistent tool for creep life prediction.
Date de publication	2012-11
Dans	Journal of Materials Engineering and Performance 21, nº 11 (novembre 2012) : 2255–2262.
Langue	anglais
Publications évaluées par des pairs	Oui
Identificateur	191
Numéro NPARC	21268424
Exporter la notice	Exporter en format RIS
Signaler une correction	Signaler une correction (s'ouvre dans un nouvel onglet)
Identificateur de l’enregistrement	5366c419-2c6c-4611-b6b3-df72b2c10663
Enregistrement créé	2013-07-11
Enregistrement modifié	2020-04-21