Cyclic behaviour modelling of martensitic hot work tool steels

Abstract : In this paper, an unified elasto-viscoplastic behaviour model based on internal states variables, is investigated in order to describe the thermo-mechanical stress-strain fatigue response of tempered martensitic steels. This model includes an isotropic part (drag stress) describing the cyclic softening of martensitic steels. The memory effect is introduced to take into account the influence of the plastic strain range on the amount of the cyclic softening. The kinematic part (back stress) of the model allows the description of complex load conditions to which tool steels are subjected. Thus, strain recovery (Baushinger effect) and time recovery terms (cyclic behaviour including tensile and compressive dwell time and ratcheting) are considered. Moreover, the identification methodology of the model parameters from only two sets of experimental data is presented; the coefficients of the kinematic and isotropic parts are determined successively. The main difficulty consists in reaching a good description both of the cyclic behaviour for different strain rates and the ratcheting effect.
Type de document :
Communication dans un congrès
sous la dir. de G. BIALLAS, H.J. MAIER, O. HAHN et al. -. CAMP2002 -Conferences on applied mechanics, materials science and joining and forming processes, Apr 2002, Paderborn, Germany. BONIFATIUS, Extrait de : High-temperature fatigue / sous la dir. de G. BIALLAS, H.J. MAIER, O. HAHN et al. - ISBN 3-00-009254-4, p.64-75, 2002
Liste complète des métadonnées

Littérature citée [9 références]  Voir  Masquer  Télécharger

https://hal.archives-ouvertes.fr/hal-01796849
Contributeur : Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Soumis le : lundi 28 mai 2018 - 16:13:40
Dernière modification le : mardi 19 juin 2018 - 22:28:02
Document(s) archivé(s) le : mercredi 29 août 2018 - 14:56:04

Fichier

article_CAMP2002.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : hal-01796849, version 1

Collections

Citation

Vincent Velay, Gérard Bernhart, Zhanping Zhang, Luc Penazzi. Cyclic behaviour modelling of martensitic hot work tool steels. sous la dir. de G. BIALLAS, H.J. MAIER, O. HAHN et al. -. CAMP2002 -Conferences on applied mechanics, materials science and joining and forming processes, Apr 2002, Paderborn, Germany. BONIFATIUS, Extrait de : High-temperature fatigue / sous la dir. de G. BIALLAS, H.J. MAIER, O. HAHN et al. - ISBN 3-00-009254-4, p.64-75, 2002. 〈hal-01796849〉

Partager

Métriques

Consultations de la notice

34

Téléchargements de fichiers

8