Correlative statistical microstructural assessment of precipitates and their distribution, with simultaneous electron backscatter diffraction and energy dispersive X-ray spectroscopy
File(s)2102.03279v2.pdf (2.41 MB)
Accepted version
Author(s)
Bilsland, Chris
Barrow, Andrew
Britton, T Ben
Type
Journal Article
Abstract
Modern engineering alloys have bespoke microstructures, where features such as precipitates are used to control properties. In many Ni-based alloys, carbo-nitride precipitates are introduced to strengthen and improve performance. These precipitates can be distributed throughout the microstructure and niobium rich carbides are often found at grain boundaries. In this work, we used combined energy dispersive X-ray spectroscopy (EDS) and electron backscatter diffraction (EBSD) to characterise the population of these precipitates. Processing of the EDS signal is used to label the Mo/Nb-rich precipitates, and their size and location are measured from maps using a circular Hough transform. This label map is combined with the grain boundary network (from EBSD analysis). Statistical analysis, using ANOVA testing, reveals differences in chemistry between carbides found in Ni-rich matrix grain interiors, on random high angle boundaries and on special boundaries (Σ3 and Σ9). These results are compared between wrought and power metallurgy product forms. These distributions are discussed in the context of their performance within demanding environments, such as reactor core internals.
Date Issued
2021-06
Date Acceptance
2021-03-26
Citation
Materials Characterization, 2021, 176, pp.1-10
ISSN
1044-5803
Publisher
Elsevier BV
Start Page
1
End Page
10
Journal / Book Title
Materials Characterization
Volume
176
Copyright Statement
© 2021 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Identifier
https://www.sciencedirect.com/science/article/pii/S1044580321002011?via%3Dihub
Subjects
cond-mat.mtrl-sci
cond-mat.mtrl-sci
0912 Materials Engineering
0913 Mechanical Engineering
Materials
Publication Status
Published
Article Number
111071
Date Publish Online
2021-03-31