Hydrogen pick-up in zirconium alloys can lead to their structural failure, which is an important problem in the nuclear industry. This investigation focuses on modelling the accumulation of hydrogen in the vicinity of loaded V-notches in four-point bend Zircaloy-4 specimens. In order to account for the anisotropic diffusivity of hydrogen in hexagonal close-packed α-zirconium, a multiscale methodology is proposed to compute notch-tip hydrogen profiles. This methodology unifies continuum scale stress analysis, using the finite element approach, and atomistic scale stress analysis, using the elastic dipole tensor of point defects. The steady state notch-tip hydrogen profiles are determined for different notch geometries and crystal orientations. It was found that hydrogen enhancement is greater but more localised for sharper notches with a smaller flank angles, which is the expected effect of stress. It was also found that hydrogen enhancement is greater if the notch opening plane coincides with the prism plane as opposed to the basal plane. This anisotropic effect is a consequence of the trigonal symmetry of the hydrogen interstitialcy.
Skip Nav Destination
Close
Sign In or Register for Account
ASME 2018 Pressure Vessels and Piping Conference
July 15–20, 2018
Prague, Czech Republic
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5168-5
PROCEEDINGS PAPER
Multiscale Stress-Diffusion Analysis of Notch-Tip Hydrogen Profiles in Zircaloy-4
Said El Chamaa,
Said El Chamaa
Imperial College London, London, UK
Search for other works by this author on:
Mitesh Patel,
Mitesh Patel
Imperial College London, London, UK
Search for other works by this author on:
Mark R. Wenman,
Mark R. Wenman
Imperial College London, London, UK
Search for other works by this author on:
Catrin M. Davies
Catrin M. Davies
Imperial College London, London, UK
Search for other works by this author on:
Said El Chamaa
Imperial College London, London, UK
Mitesh Patel
Imperial College London, London, UK
Mark R. Wenman
Imperial College London, London, UK
Catrin M. Davies
Imperial College London, London, UK
Paper No:
PVP2018-84555, V06BT06A013; 10 pages
Published Online:
October 26, 2018
Citation
El Chamaa, S, Patel, M, Wenman, MR, & Davies, CM. "Multiscale Stress-Diffusion Analysis of Notch-Tip Hydrogen Profiles in Zircaloy-4." Proceedings of the ASME 2018 Pressure Vessels and Piping Conference. Volume 6B: Materials and Fabrication. Prague, Czech Republic. July 15–20, 2018. V06BT06A013. ASME. https://doi.org/10.1115/PVP2018-84555
Download citation file:
- Ris (Zotero)
- Reference Manager
- EasyBib
- Bookends
- Mendeley
- Papers
- EndNote
- RefWorks
- BibTex
- ProCite
- Medlars
Close
Sign In
50
Views
0
Citations
Related Proceedings Papers
Related Articles
From Micro to Nano: Material Characterization Methods for Testing of Nuclear Core and Structural Materials
ASME J of Nuclear Rad Sci (July,2019)
Initiation and Arrest of Delayed Hydride Cracking in Zr–2.5Nb Tubes
J. Pressure Vessel Technol (February,2009)
Statistical Evaluation of Local Stress and Strain of Three Dimensional Polycrystalline Material at Elevated Temperature
J. Pressure Vessel Technol (February,2012)
Related Chapters
Industrially-Relevant Multiscale Modeling of Hydrogen Assisted Degradation
International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions
Subsection NB—Class 1 Components
Companion Guide to the ASME Boiler and Pressure Vessel Code, Volume 1, Fourth Edition
A 3D Cohesive Modelling Approach for Hydrogen Embrittlement in Welded Joints of X70 Pipeline Steel
International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions