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Title: Neutron Scattering Measurements of Hydrogen Distribution in a Zircaloy-4 Alloy Charged with Hydrogen Gas

Abstract

Neutron incoherent scattering measurements were conducted on Zircaloy-4 round bars. The specimens were charged in a tube furnace at 430 C, using a 12.5 vol. % hydrogen in an argon mixture for 30, 60, and 90 minutes at 13.8 kPa pressure. The volume-average neutron diffraction measurements showed the presence of the face-centered-cubic delta zirconium hydride ({delta}-ZrH{sub 2}) phase in the hydrogenated specimens. The assessment of the background in the diffraction profiles due to the incoherent scattering from the hydrogen atoms was carried out by performing inelastic scans around zero energy transfer and at a fixed two-theta value for which there was only flat background and no coherent scattering. To estimate the relative amount of hydrogen in the Zircaloy-4 samples, the increase in incoherent scattering intensities with hydrogen content was calibrated using samples for which the hydrogen content was known. Measurement of the background scattering from locations within the round bar was also performed to map the distribution of hydrogen content.

Authors:
 [1];  [1];  [1];  [1];  [2];  [2]
  1. ORNL
  2. University of Tennessee, Knoxville (UTK)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); High Flux Isotope Reactor; High Temperature Materials Laboratory
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
949736
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Science Forum; Journal Volume: 539-543; Journal Issue: n PART 2
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 36 MATERIALS SCIENCE; ALLOYS; ARGON; ATOMS; COHERENT SCATTERING; DIFFRACTION; DISTRIBUTION; ENERGY TRANSFER; FCC LATTICES; FURNACES; HYDROGEN; INCOHERENT SCATTERING; MIXTURES; NEUTRON DIFFRACTION; NEUTRONS; SCATTERING; ZIRCALOY 4; ZIRCONIUM HYDRIDES

Citation Formats

Garlea, Elena, Garlea, Vasile O, Choo, Hahn, Hubbard, Camden R, Liaw, Peter K, and Rack, P. D. Neutron Scattering Measurements of Hydrogen Distribution in a Zircaloy-4 Alloy Charged with Hydrogen Gas. United States: N. p., 2007. Web. doi:10.4028/www.scientific.net/MSF.539-543.1443.
Garlea, Elena, Garlea, Vasile O, Choo, Hahn, Hubbard, Camden R, Liaw, Peter K, & Rack, P. D. Neutron Scattering Measurements of Hydrogen Distribution in a Zircaloy-4 Alloy Charged with Hydrogen Gas. United States. doi:10.4028/www.scientific.net/MSF.539-543.1443.
Garlea, Elena, Garlea, Vasile O, Choo, Hahn, Hubbard, Camden R, Liaw, Peter K, and Rack, P. D. Mon . "Neutron Scattering Measurements of Hydrogen Distribution in a Zircaloy-4 Alloy Charged with Hydrogen Gas". United States. doi:10.4028/www.scientific.net/MSF.539-543.1443.
@article{osti_949736,
title = {Neutron Scattering Measurements of Hydrogen Distribution in a Zircaloy-4 Alloy Charged with Hydrogen Gas},
author = {Garlea, Elena and Garlea, Vasile O and Choo, Hahn and Hubbard, Camden R and Liaw, Peter K and Rack, P. D.},
abstractNote = {Neutron incoherent scattering measurements were conducted on Zircaloy-4 round bars. The specimens were charged in a tube furnace at 430 C, using a 12.5 vol. % hydrogen in an argon mixture for 30, 60, and 90 minutes at 13.8 kPa pressure. The volume-average neutron diffraction measurements showed the presence of the face-centered-cubic delta zirconium hydride ({delta}-ZrH{sub 2}) phase in the hydrogenated specimens. The assessment of the background in the diffraction profiles due to the incoherent scattering from the hydrogen atoms was carried out by performing inelastic scans around zero energy transfer and at a fixed two-theta value for which there was only flat background and no coherent scattering. To estimate the relative amount of hydrogen in the Zircaloy-4 samples, the increase in incoherent scattering intensities with hydrogen content was calibrated using samples for which the hydrogen content was known. Measurement of the background scattering from locations within the round bar was also performed to map the distribution of hydrogen content.},
doi = {10.4028/www.scientific.net/MSF.539-543.1443},
journal = {Materials Science Forum},
number = n PART 2,
volume = 539-543,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}