期刊
出版社
ROYAL SOC
DOI: 10.1098/rspa.2021.0909
关键词
dislocations; Burgers vectors; Bragg coherent diffraction imaging; high-resolution transmission Kikuchi diffraction
资金
- Engineering Undergraduate Research Opportunities Programme (EUROP)
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [714697]
This paper presents a theoretical framework for calculating Burgers vectors from strain and lattice rotation data in materials with low dislocation density, as well as its implementation into a computer program for automation. The method's efficacy is validated using simulated data, demonstrating its reliable identification of dislocation positions and accurate determination of Burgers vectors from experimental data. The reported method offers a general and robust framework for determining dislocation position and associated Burgers vector, which can be readily applied to data from different experimental techniques.
A theoretical framework for computation of Burgers vectors from strain and lattice rotation data in materials with low dislocation density is presented, as well as implementation into a computer program to automate the process. The efficacy of the method is verified using simulated data of dislocations with known results. A three-dimensional dataset retrieved from Bragg coherent diffraction imaging (BCDI) and a two-dimensional dataset from high-resolution transmission Kikuchi diffraction (HR-TKD) are used as inputs to demonstrate the reliable identification of dislocation positions and accurate determination of Burgers vectors from experimental data. For BCDI data, the results found using our approach show very close agreement to those expected from empirical methods. For the HR-TKD data, the predicted dislocation position and the computed Burgers vector showed fair agreement with the expected result, which is promising considering the substantial experimental uncertainties in this dataset. The method reported in this paper provides a general and robust framework for determining dislocation position and associated Burgers vector, and can be readily applied to data from different experimental techniques.
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