Full elastic strain tensor determination at the phase scale in a powder metallurgy nickel-based superalloy using X-ray Laue microdiffraction - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue Journal of Applied Crystallography Année : 2017

Full elastic strain tensor determination at the phase scale in a powder metallurgy nickel-based superalloy using X-ray Laue microdiffraction

Résumé

Laue microdiffraction is used to determine the full elastic strain tensor of the γ and γ′ phases in grains of a nickel-based superalloy with a coarse-grained microstructure. A `rainbow' filter and an energy dispersive point detector are employed to measure the energy of Bragg reflections. For the two techniques, an uncertainty of ±2.5 × 10−3 Å is obtained for the undetermined crystal lattice parameter. Our measurements show that the filter method provides better confidence, energy resolution, accuracy and acquisition time. The sensitivity of each method with respect to the γ–γ′ lattice mismatch is demonstrated with measurements in samples with average precipitate sizes of 200 and 2000 nm. For the 200 nm precipitate size, the lattice mismatch is less than 2 × 10−3 Å and the dilatational strains are close to ±1.5 × 10−3 depending on the considered phase. For the 2000 nm precipitate size, the lattice mismatch is close to 8 × 10−3 Å and almost no elastic strain occurs in the microstructure.

Domaines

Matériaux
Fichier principal
Vignette du fichier
19361_Altinkurt.pdf (1.09 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-01654602 , version 1 (06-11-2023)

Identifiants

Citer

Gader Altinkurt, Mathieu Fèvre, Odile Robach, Jean-Sébastien Micha, Guillaume Geandier, et al.. Full elastic strain tensor determination at the phase scale in a powder metallurgy nickel-based superalloy using X-ray Laue microdiffraction. Journal of Applied Crystallography, 2017, 50 (6), pp.1754 - 1765. ⟨10.1107/s1600576717014558⟩. ⟨hal-01654602⟩
170 Consultations
7 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More