The assessment of local lattice strains in alloys using total scattering
Publication Date
2019-05-15Journal Title
Acta Materialia
ISSN
1359-6454
Publisher
Elsevier BV
Volume
170
Pages
38-49
Type
Article
This Version
AM
Metadata
Show full item recordCitation
Owen, L., Stone, H., & Playford, H. (2019). The assessment of local lattice strains in alloys using total scattering. Acta Materialia, 170 38-49. https://doi.org/10.1016/j.actamat.2019.02.038
Abstract
The highly-strained lattice hypothesis in high-entropy alloys (HEAs) has led to an interest in local distortions created in substitutional solid-solution alloys. In this work, the use of total scattering for the assessment and analysis of local lattice strains in alloys is considered. Using two theoretical models, the variation in the width of peaks in the pair distribution function (PDF) with changes in composition, ordering and atomic radius is presented. Key practical considerations for the successful analysis of local lattice strains using this technique are discussed, with particular reference to sample preparation, instrumental and data processing effects. Further, the mitigation of errors in local-strain measurements caused by differences in the scattering length of constituent atoms is presented. This is concluded with a proposed methodology for the analysis of local strains using this technique
Relationships
Is supplemented by: https://doi.org/10.17863/CAM.37370
Sponsorship
UNIVERSITY OF BIRMINGHAM (FB EPSRC) (EP/H022309/1)
EPSRC (EP/M005607/1)
EPSRC (1369206)
Identifiers
External DOI: https://doi.org/10.1016/j.actamat.2019.02.038
This record's URL: https://www.repository.cam.ac.uk/handle/1810/290271
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International
Licence URL: https://creativecommons.org/licenses/by-nc-nd/4.0/