A new approach to the analysis of short-range order in alloys using total scattering
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Publication Date
2016-06-08Journal Title
Acta Materialia
ISSN
1359-6454
Publisher
Elsevier
Volume
115
Pages
155-166
Language
English
Type
Article
This Version
AM
Metadata
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Owen, L., Playford, H., Stone, H., & Tucker, M. (2016). A new approach to the analysis of short-range order in alloys using total scattering. Acta Materialia, 115 155-166. https://doi.org/10.1016/j.actamat.2016.05.031
Abstract
In spite of its influence on a number of physical properties, short-range order in crystalline alloys has received little recent attention, largely due to the complexity of the experimental methods involved. In this work, a novel approach that could be used for the analysis of ordering transitions and short-range order in crystalline alloys using total scattering and reverse Monte Carlo (RMC) refinements is presented. Calculated pair distribution functions representative of different types of short-range order are used to illustrate the level of information contained within these experimentally accessible functions and the insight into ordering which may be obtained using this new method. Key considerations in the acquisition of data of sufficient quality for successful analysis are also discussed. It is shown that the atomistic models obtained from RMC refinements may be analysed to identify directly the Clapp configurations that are present. It is further shown how these configurations can be enhanced compared with a random structure, and how their degradation pathways and the distribution of Warren-Cowley parameters, can then be used to obtain a detailed, quantitative structural description of the short-range order occurring in crystalline alloys.
Keywords
atomic ordering, diffraction, pair correlation function, short-range order, short-range ordering
Relationships
Is supplemented by: https://doi.org/10.1016/j.actamat.2016.05.031
Sponsorship
Science and Technology Facilities Council
Funder references
EPSRC (EP/M005607/1)
UNIVERSITY OF BIRMINGHAM (FB EPSRC) (EP/H022309/1)
Identifiers
External DOI: https://doi.org/10.1016/j.actamat.2016.05.031
This record's URL: https://www.repository.cam.ac.uk/handle/1810/256337
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International, Attribution-NonCommercial-NoDerivatives 4.0 International, Attribution-NonCommercial-NoDerivatives 4.0 International, Attribution-NonCommercial-NoDerivatives 4.0 International
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