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Multiscale correlative tomography: an investigation of creep cavitation in 316 stainless steel

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). Multiscale correlative tomography: an investigation of creep cavitation in 316 stainless steel. Scientific Reports, 7(1), article no. 7332.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1038/s41598-017-06976-5
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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.

Item Type: Journal Item
Copyright Holders: 2017 The Authors
ISSN: 2045-2322
Project Funding Details:
Funded Project NameProject IDFunding Body
Henry Moseley X-ray Imaging FacilityEP/F007906EPSRC (Engineering and Physical Sciences Research Council)
Henry Moseley X-ray Imaging FacilityEP/F001452EPSRC (Engineering and Physical Sciences Research Council)
Henry Moseley X-ray Imaging FacilityEP/I02249XEPSRC (Engineering and Physical Sciences Research Council)
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 50438
Depositing User: Shirley Northover
Date Deposited: 10 Aug 2017 14:23
Last Modified: 03 May 2019 08:16
URI: http://oro.open.ac.uk/id/eprint/50438
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