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Hydride reorientation in Zircaloy-4 examined by in situ synchrotron X-ray diffraction
DOI:
10.1016/j.jnucmat.2016.05.029
Authors:
Hannah
Weekes
(Imperial College London)
,
Nicholas
Jones
(University of Cambridge)
,
Trevor
Lindley
(Imperial College London)
,
David
Dye
(Imperial College London)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Journal Of Nuclear Materials
, VOL 478
, PAGES 32 - 41
State:
Published (Approved)
Published:
September 2016
Diamond Proposal Number(s):
8755
Abstract: The phenomenon of stress-reorientation has been investigated using in situ X-ray diffraction during the thermomechanical cycling of hydrided Zircaloy-4 tensile specimens. Results have shown that loading along a sample’s transverse direction (TD) leads to a greater degree of hydride reorientation when compared to rolling direction (RD)-aligned samples. The elastic lattice micro-strains associated with radially oriented hydrides have been revealed to be greater than those oriented circumferentially, a consequence of strain accommodation. Evidence of hydride redistribution after cycling, to α-Zr grains oriented in a more favourable orientation when under an applied stress, has also been observed and its behaviour has been found to be highly dependent on the loading axis. Finally, thermomechanical loading across multiple cycles has been shown to reduce the difference in terminal solid solubility of hydrogen during dissolution (TSSD,H) and precipitation (TSSP,H).
Journal Keywords: Zirconium alloys; Zirconium hydride; Reorientation; Synchrotron x-ray diffraction
Diamond Keywords: Alloys
Subject Areas:
Materials,
Engineering
Instruments:
I12-JEEP: Joint Engineering, Environmental and Processing
Added On:
20/06/2016 13:49
Discipline Tags:
Materials Engineering & Processes
Materials Science
Engineering & Technology
Metallurgy
Technical Tags:
Diffraction