Fatigue-oxidation interaction models for life prediction of hot forming tools steels under transient thermomechanical loadings - IMT Mines Albi-Carmaux Accéder directement au contenu
Article Dans Une Revue International Journal of Microstructure and Materials Properties Année : 2008

Fatigue-oxidation interaction models for life prediction of hot forming tools steels under transient thermomechanical loadings

Résumé

This contribution deals with the life prediction of the virgin and nitrided hot-working tool steels X38CrMoV5 (AISI H11, 47 HRC) under Transient Thermomechanical (TMF) loading. Isothermal Low Cycle Fatigue (LCF) and thermomechanical (TMF) behaviour are investigated at different temperatures and various frequencies. It is shown that nitruration can enhance the fatigue life only when the strain amplitude is lower than a critical value. Two Manson-Coffin laws govern the fatigue life of the virgin and nitrided steels for all temperatures and strain rates investigated. However, these models have shortcomings for predicting TMF life. Predictive fatigue life models take into account the interaction with oxidation. Regarding the second tempering temperature (550°C) and the steel surface (virgin or nitrided), a Paris-type (T > 550°C) or a Tomkins-type (T < 550°C) law is used. A modified Tomkins model considering the mean residual stress measured by X-Ray at high temperature in the nitrided layer is used. The model is applied for isothermal and thermal mechanical fatigue experiments performed and reported in literature. Reference to this paper should be made as follows: Daffos, C., Lamesle, P. and Rézaï-Aria, F. (2008) 'Fatigue-oxidation interaction models for life prediction of hot-forming tools steels under transient thermomechanical loadings', Int. J.
Fichier principal
Vignette du fichier
Fatigue–oxidation-interaction-models-for-life-prediction-of-hot-forming-tools-steels-under-transient-thermomechanical-loadings.pdf (797.01 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01851426 , version 1 (28-10-2020)

Identifiants

Citer

Christophe Daffos, Pascal Lamesle, Farhad Rezai-Aria. Fatigue-oxidation interaction models for life prediction of hot forming tools steels under transient thermomechanical loadings. International Journal of Microstructure and Materials Properties, 2008, 3 (2-3), p.350-362. ⟨10.1504/IJMMP.2008.018740⟩. ⟨hal-01851426⟩
42 Consultations
105 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More