In situ synchrotron ultrasonic fatigue testing device for 3D characterisation of internal crack initiation and growth
Résumé
This work presents a new ultrasonic fatigue testing device for studying the initiation and propagation mechanisms of internal microstructurally short fatigue cracks using in situ synchrotron tomography. Its principle is described as well as the method used for automatically detecting crack initiation and its subsequent growth. To promote internal crack initiation, specimens containing internal casting defects were tested between the high cycle and very high cycle fatigue regimes (107-109 cycles). Preliminary results show the ability of this new device to initiate an internal microstructurally short crack in a reasonable testing time and monitor its growth.
Mots clés
Ultrasonic fatigue testing
Very high cycle fatigue
Short fatigue cracks
Fatigue testing
Plastic deformation
Synchrotron radiation
Tomography
Ultrasonic testing
Casting defect
In-situ synchrotrons
Internal shorts
Crack propagation
Crack initiation
Aluminum alloys
Ability testing
X-ray tomography
Fatigue of materials
Domaines
Matériaux| Origine | Fichiers produits par l'(les) auteur(s) |
|---|
Loading...