Three-phase material mapping with incomplete X-ray diffraction spectral information

© Xuyang Chang et al. 2023.

Détails bibliographiques
Publié dans:Journal of applied crystallography. - 1998. - 56(2023), Pt 3 vom: 01. Juni, Seite 750-763
Auteur principal: Chang, Xuyang (Auteur)
Autres auteurs: Lavernhe-Taillard, Karine, Roux, Stéphane, Hubert, Olivier
Format: Article en ligne
Langue:English
Publié: 2023
Accès à la collection:Journal of applied crystallography
Sujets:Journal Article X-ray diffraction proper orthogonal decomposition shape-memory alloys
Description
Résumé:© Xuyang Chang et al. 2023.
An equiatomic nickel-titanium shape-memory alloy specimen subjected to a uniaxial tensile load undergoes a two-step phase transformation under stress, from austenite (A) to a rhombohedral phase (R) and further to martensite (M) variants. The pseudo-elasticity that goes accompanies the phase transformation induces spatial inhomogeneity. To unravel the spatial distribution of the phases, in situ X-ray diffraction analyses are performed while the sample is under tensile load. However, the diffraction spectra of the R phase, as well as the extent of potential martensite detwinning, are not known. A novel algorithm, based on a proper orthogonal decomposition and incorporating inequality constraints, is proposed in order to map out the different phases and simultaneously yield the missing diffraction spectral information. An experimental case study illustrates the methodology
Description:Date Revised 08.06.2023
published: Electronic-eCollection
Citation Status PubMed-not-MEDLINE
ISSN:0021-8898
DOI:10.1107/S160057672300331X