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Slater, T. J. A.; Bradley, R. S.; Bertali, G.; Geurts, R.; Northover, S. M.; Burke, M. G.; Haigh, S. J.; Burnett, T. L. and Withers, P. J.
(2017).
DOI: https://doi.org/10.1038/s41598-017-06976-5
Abstract
Creep cavitation in an ex-service nuclear steam header Type 316 stainless steel sample is investigated through a multiscale tomography workflow spanning eight orders of magnitude, combining X-ray computed tomography (CT), plasma focused ion beam (FIB) scanning electron microscope (SEM) imaging and scanning transmission electron microscope (STEM) tomography. Guided by microscale X-ray CT, nanoscale X-ray CT is used to investigate the size and morphology of cavities at a triple point of grain boundaries. In order to understand the factors affecting the extent of cavitation, the orientation and crystallographic misorientation of each boundary is characterised using electron backscatter diffraction (EBSD). Additionally, in order to better understand boundary phase growth, the chemistry of a single boundary and its associated secondary phase precipitates is probed through STEM energy dispersive X-ray (EDX) tomography. The difference in cavitation of the three grain boundaries investigated suggests that the orientation of grain boundaries with respect to the direction of principal stress is important in the promotion of cavity formation.
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About
- Item ORO ID
- 50438
- Item Type
- Journal Item
- ISSN
- 2045-2322
- Project Funding Details
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Funded Project Name Project ID Funding Body Henry Moseley X-ray Imaging Facility EP/F007906 EPSRC (Engineering and Physical Sciences Research Council) Henry Moseley X-ray Imaging Facility EP/F001452 EPSRC (Engineering and Physical Sciences Research Council) Henry Moseley X-ray Imaging Facility EP/I02249X EPSRC (Engineering and Physical Sciences Research Council) - Academic Unit or School
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Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM) - Copyright Holders
- © 2017 The Authors
- Depositing User
- Shirley Northover