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

© Xuyang Chang et al. 2023.

Bibliographische Detailangaben
Veröffentlicht in:Journal of applied crystallography. - 1998. - 56(2023), Pt 3 vom: 01. Juni, Seite 750-763
1. Verfasser: Chang, Xuyang (VerfasserIn)
Weitere Verfasser: Lavernhe-Taillard, Karine, Roux, Stéphane, Hubert, Olivier
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Journal of applied crystallography
Schlagworte:Journal Article X-ray diffraction proper orthogonal decomposition shape-memory alloys
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520 |a 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 
650 4 |a Journal Article 
650 4 |a X-ray diffraction 
650 4 |a proper orthogonal decomposition 
650 4 |a shape-memory alloys 
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700 1 |a Roux, Stéphane  |e verfasserin  |4 aut 
700 1 |a Hubert, Olivier  |e verfasserin  |4 aut 
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