In situ micropillar deformation of hydrides in Zircaloy-4

H. E. Weekes, V. A. Vorontsov, I. P. Dolbnya, J. D. Plummer, F. Giuliani, T. B. Britton, D. Dye

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Deformation of hydrided Zircaloy-4 has been examined using in situ loading of hydrided micropillars in the scanning electron microscope and using synchrotron X-ray Laue microbeam diffraction. Results suggest that both the matrix and hydride can co-deform, with storage of deformation defects observed within the hydrides, which were twinned. Hydrides placed at the plane of maximum shear stress showed deformation within the hydride packet, whilst packets in other pillars arrested the propagation of shear bands. X-ray Laue peak broadening, prior to deformation, was associated with the precipitation of hydrides, and during deformation plastic rotation and broadening of both the matrix and hydride peaks were observed. Post-mortem TEM of the deformed pillars has indicated a greater density of dislocations associated with the precipitated hydride packets, while the observed broadening of the hydride electron diffraction spots further suggests that plastic strain gradients were induced in the hydrides by compression.

LanguageEnglish
Pages81-96
Number of pages16
JournalActa Materialia
Volume92
DOIs
Publication statusPublished - 15 Jun 2015

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Hydrides
Plastic deformation
X rays
Shear bands
Synchrotrons
Electron diffraction
Shear stress
Electron microscopes
Diffraction
Transmission electron microscopy
Scanning
Defects

Keywords

  • hydrides
  • micromechanics
  • synchrotron diffraction
  • TEM
  • zirconium

Cite this

Weekes, H. E., Vorontsov, V. A., Dolbnya, I. P., Plummer, J. D., Giuliani, F., Britton, T. B., & Dye, D. (2015). In situ micropillar deformation of hydrides in Zircaloy-4. Acta Materialia, 92, 81-96. https://doi.org/10.1016/j.actamat.2015.03.037
Weekes, H. E. ; Vorontsov, V. A. ; Dolbnya, I. P. ; Plummer, J. D. ; Giuliani, F. ; Britton, T. B. ; Dye, D. / In situ micropillar deformation of hydrides in Zircaloy-4. In: Acta Materialia. 2015 ; Vol. 92. pp. 81-96.
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Weekes, HE, Vorontsov, VA, Dolbnya, IP, Plummer, JD, Giuliani, F, Britton, TB & Dye, D 2015, 'In situ micropillar deformation of hydrides in Zircaloy-4' Acta Materialia, vol. 92, pp. 81-96. https://doi.org/10.1016/j.actamat.2015.03.037

In situ micropillar deformation of hydrides in Zircaloy-4. / Weekes, H. E.; Vorontsov, V. A.; Dolbnya, I. P.; Plummer, J. D.; Giuliani, F.; Britton, T. B.; Dye, D.

In: Acta Materialia, Vol. 92, 15.06.2015, p. 81-96.

Research output: Contribution to journalArticle

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AU - Giuliani, F.

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Weekes HE, Vorontsov VA, Dolbnya IP, Plummer JD, Giuliani F, Britton TB et al. In situ micropillar deformation of hydrides in Zircaloy-4. Acta Materialia. 2015 Jun 15;92:81-96. https://doi.org/10.1016/j.actamat.2015.03.037