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The effect of cooling rate and grain size on hydride microstructure in Zircaloy-4

Abstract:
We explore the distribution, morphology and structure of zirconium hydrides formed using different cooling rates through the solid state Zr+[H] → Zr + hydride transus, in fine and blocky alpha Zircaloy-4. We observe that cooling rate and grain size control the phase and distribution of hydrides formed. The blocky alpha (coarse grain, > 200 μm) Zircaloy-4, has a smaller grain boundary area to grain volume ratio and this significantly affects nucleation and growth of hydrides as compared to fine grain size (∼11 μm) material.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1016/j.jnucmat.2018.11.011

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Role:
Author
ORCID:
0000-0002-9002-9645
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Institution:
University of Oxford
Division:
MPLS
Department:
Materials
Role:
Author
ORCID:
0000-0001-5343-9365
Publisher:
Elsevier
Journal:
Journal of Nuclear Materials More from this journal
Volume:
513
Pages:
221-225
Publication date:
2018-11-08
Acceptance date:
2018-11-07
DOI:
EISSN:
1873-4820
ISSN:
0022-3115
Language:
English
Keywords:
Pubs id:
pubs:899076
UUID:
uuid:23d7ba6a-cdd3-480f-aeaa-286e5347a858
Local pid:
pubs:899076
Source identifiers:
899076
Deposit date:
2019-02-07

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