Imperial College London
Portrait Picture

ProfessorDavidDye

Faculty of Engineering, Department of Materials

Professor of Metallurgy
 
 
 
//

Contact

 

+44 (0)20 7594 6811david.dye

 
 
//

Location

 

1.09GoldsmithSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{McAuliffe:2020:10.1016/j.ultramic.2020.112944,
author = {McAuliffe, TP and Foden, A and Bilsland, C and Daskalaki, Mountanou D and Dye, D and Britton, TB},
doi = {10.1016/j.ultramic.2020.112944},
journal = {Ultramicroscopy},
pages = {1--16},
title = {Advancing characterisation with statistics from correlative electron diffraction and X-ray spectroscopy, in the scanning electron microscope.},
url = {http://dx.doi.org/10.1016/j.ultramic.2020.112944},
volume = {211},
year = {2020}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The routine and unique determination of minor phases in microstructures is critical to materials science. In metallurgy alone, applications include alloy and process development and the understanding of degradation in service. We develop a correlative method, exploring superalloy microstructures, which are examined in the scanning electron microscope (SEM) using simultaneous energy dispersive X-ray spectroscopy (EDS) and electron backscatter diffraction (EBSD). This is performed at an appropriate length scale for characterisation of carbide phases' shape, size, location, and distribution. EDS and EBSD data are generated using two different physical processes, but each provide a signature of the material interacting with the incoming electron beam. Recent advances in post-processing, driven by 'big data' approaches, include use of principal component analysis (PCA). Components are subsequently characterised to assign labels to a mapped region. To provide physically meaningful signals, the principal components may be rotated to control the distribution of variance. In this work, we develop this method further through a weighted PCA approach. We use the EDS and EBSD signals concurrently, thereby labelling each region using both EDS (chemistry) and EBSD (crystal structure) information. This provides a new method of amplifying signal-to-noise for very small phases in mapped regions, especially where the EDS or EBSD signal is not unique enough alone for classification.
AU  - McAuliffe,TP
AU  - Foden,A
AU  - Bilsland,C
AU  - Daskalaki,Mountanou D
AU  - Dye,D
AU  - Britton,TB
DO  - 10.1016/j.ultramic.2020.112944
EP  - 16
PY  - 2020///
SN  - 0304-3991
SP  - 1
TI  - Advancing characterisation with statistics from correlative electron diffraction and X-ray spectroscopy, in the scanning electron microscope.
T2  - Ultramicroscopy
UR  - http://dx.doi.org/10.1016/j.ultramic.2020.112944
UR  - https://www.ncbi.nlm.nih.gov/pubmed/32000031
UR  - https://www.sciencedirect.com/science/article/pii/S0304399119302773?via%3Dihub
UR  - http://hdl.handle.net/10044/1/77750
VL  - 211
ER  -
Download