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Title: The influence of stress state on the reorientation of hydrides in a zirconium alloy

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1359422
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 477; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-05-28 09:17:18; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Cinbiz, Mahmut N., Koss, Donald A., and Motta, Arthur T. The influence of stress state on the reorientation of hydrides in a zirconium alloy. Netherlands: N. p., 2016. Web. doi:10.1016/j.jnucmat.2016.05.013.
Cinbiz, Mahmut N., Koss, Donald A., & Motta, Arthur T. The influence of stress state on the reorientation of hydrides in a zirconium alloy. Netherlands. doi:10.1016/j.jnucmat.2016.05.013.
Cinbiz, Mahmut N., Koss, Donald A., and Motta, Arthur T. 2016. "The influence of stress state on the reorientation of hydrides in a zirconium alloy". Netherlands. doi:10.1016/j.jnucmat.2016.05.013.
@article{osti_1359422,
title = {The influence of stress state on the reorientation of hydrides in a zirconium alloy},
author = {Cinbiz, Mahmut N. and Koss, Donald A. and Motta, Arthur T.},
abstractNote = {},
doi = {10.1016/j.jnucmat.2016.05.013},
journal = {Journal of Nuclear Materials},
number = C,
volume = 477,
place = {Netherlands},
year = 2016,
month = 8
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.jnucmat.2016.05.013

Citation Metrics:
Cited by: 3works
Citation information provided by
Web of Science

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  • A stress-induced reorientation relaxation due to interstitial hydrogen in a Nb--50-at. %-V alloy has been investigated by internal friction for H concentrations between 2.5 and 28 at. %. The peak is interpreted as a Snoek-type relaxation with a distribution of activation energies across the peak from 0.05 to 0.25 eV. This energy spectrum is due to differing environments of the interstitial hydrogen owing to a variation of the chemical short-range order in the alloy. The internal-friction maximum and the values for the modulus defect are roughly linear in concentration, indicating that H clustering is not involved. The reduction of themore » modulus with decreasing temperature at temperatures above the peak, but not below, is associated with the reorientation phenomenon. There is no evidence for hydride formation in this alloy for hydrogen concentrations to C/sub H/ = 0.28, down to temperatures of approx.6 K.« less
  • Hydrogen adsorption into zirconium, as a result of corrosion in aqueous environments, leads to the precipitation of a secondary brittle hydride phase. These hydrides tend to first form at stress concentrations such as fretting flaws or cracks in engineering components, potentially degrading the structural integrity of the component. One mechanism for component failure is a slow crack growth mechanism known as Delayed Hydride Cracking (DHC), where hydride fracture occurs followed by crack arrest in the ductile zirconium matrix. The current work employs both an experimental and a modeling approach to better characterize the effects and behavior of hydride precipitation atmore » such stress concentrations. Strains around stress concentrations containing hydrides were mapped using High Energy X-ray Diffraction (HEXRD). These studies highlighted important differences in the behavior of the hydride phase and the surrounding zirconium matrix, as well as the strain associated with the precipitation of the hydride. A finite element model was also developed and compared to the X-ray strain mapping results. This model provided greater insight into details that could not be obtained directly from the experimental approaches, as well as providing a framework for future modeling to predict the effects of hydride precipitation under varied conditions.« less