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Orientation Relationships of Delta Hydrides in Zirconium and Zircaloy-4

[+] Author Affiliations
Anton Pshenichnikov, Juri Stuckert

Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany

Paper No. ICONE24-60061, pp. V001T02A006; 7 pages
  • 2016 24th International Conference on Nuclear Engineering
  • Volume 1: Operations and Maintenance, Aging Management and Plant Upgrades; Nuclear Fuel, Fuel Cycle, Reactor Physics and Transport Theory; Plant Systems, Structures, Components and Materials; I&C, Digital Controls, and Influence of Human Factors
  • Charlotte, North Carolina, USA, June 26–30, 2016
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-5001-5
  • Copyright © 2016 by ASME


The fundamental investigation reported here was motivated by the controversial and incomplete data for zirconium δ-hydride orientation relationships. For the studies, electron back scattered diffraction analysis (EBSD) was used. Formation of zirconium δ-hydrides and their bulk distribution in zirconium and Zircaloy-4 were investigated. On the basis of the grain boundary spectra and the analysis of microtexture, the orientation relationships between δ-hydrides and the α-Zr matrix were refined. It was found that almost all authors, who criticised each other for years, have established the correct relationships. Seven variants of δ-hydride accommodation in the zirconium matrix were summarised in the table of possible orientation relationships.

Copyright © 2016 by ASME
Topics: Zirconium



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