Inhomogeneous strain associated with Lüders band propagation in an FeCo-2V alloy

Toyting, Sirapob, Harrison, Christopher W., Michalik, Stefan, Lambourne, Alexis and Stone, Howard J. 2026. Inhomogeneous strain associated with Lüders band propagation in an FeCo-2V alloy. Materials Science and Technology 10.1177/02670836261443789

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Abstract

The inhomogeneous strains associated with Lüders bands in FeCo-2V have been studied. Mechanical testing revealed distinct elastic, Lüders band propagation, and work-hardening regimes. Digital Image Correlation (DIC) strain maps confirmed localised deformation during band propagation, transitioning to homogeneous plasticity post-saturation. Electron Backscatter Diffraction Kernel Average Misorientation (EBSD-KAM) analysis showed elevated misorientation angles in deformed regions, correlating with increased dislocation density. Synchrotron X-ray diffraction (XRD) showed peak broadening during Lüders band propagation, attributed to dislocation-induced lattice distortions that were quantified through Williamson-Hall analysis. The results demonstrate that Lüders bands in FeCo-2V arise from dislocation accumulation, with uniform peak width regions in XRD maps correlated with band propagation, while post-plateau work-hardening increased average peak widths. These findings provide insights into strain localisation in FeCo-2V.

Item Type:	Article
Date Type:	Published Online
Status:	In Press
Schools:	Schools > Engineering
Additional Information:	License information from Publisher: LICENSE 1: URL: https://creativecommons.org/licenses/by/4.0/, Start Date: 2026-04-21
Publisher:	SAGE Publications
ISSN:	0267-0836
Date of First Compliant Deposit:	6 May 2026
Last Modified:	06 May 2026 12:15
URI:	https://orca.cardiff.ac.uk/id/eprint/186827

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