Fatigue life and initiation mechanisms in wrought Inconel 718 DA for different microstructures - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2013

Fatigue life and initiation mechanisms in wrought Inconel 718 DA for different microstructures

(1, 2) , (3) , (1) , (2) , (2) , (1) , (1)
1
2
3

Résumé

Wrought Inconel 718 DA superalloy disk zones present a wide range of behavior in fatigue life due to the variability of the microstructure. In order to link the effect of the forging conditions and achieved microstructure to the fatigue life, two microstructures have been tested in fatigue. Fatigue tests under strain control were performed at 450°C. Grain size distributions and phase distributions were characterized in the specimens and related to fatigue failure initiation modes. Fatigue crack initiation was seen to occur on large grains in stage I for the larger grain material whereas for the material with slightly smaller grains initiation from internal nitrides caused failure via so-called fish-eye cracks. The different steps of these failure modes are discussed using data from the literature to gather the ingredients for a quantitative assessment of the fatigue lifetime using fracture mechanics.
Fichier principal
Vignette du fichier
Abikchi-Billot-Crepin_ICF_13_Beijing_2013_11_p.pdf (1.44 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-00853448 , version 1 (14-11-2013)

Identifiants

  • HAL Id : hal-00853448 , version 1

Citer

Meriem Abikchi, Thomas Billot, Jérôme Crépin, Arnaud Longuet, Caroline Mary, et al.. Fatigue life and initiation mechanisms in wrought Inconel 718 DA for different microstructures. 13th international conference on fracture, Jun 2013, Beijing, China. 11 p. ⟨hal-00853448⟩
388 Consultations
1063 Téléchargements

Partager

Gmail Facebook Twitter LinkedIn More