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Microstructure and texture analysis of δ-hydride precipitation in Zircaloy-4 materials by electron microscopy and neutron diffraction

Journal Article


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Abstract


  • This work presents a detailed microstructure and texture study of various hydrided Zircaloy-4 materials by neutron diffraction and microscopy. The results show that the precipitated δ-ZrH1.66 generally follows the δ(111)//α(0001) and δ[ ]//α[ ] orientation relationship with the α-Zr matrix. The δ-hydride displays a weak texture that is determined by the texture of the α-Zr matrix, and this dependence essentially originates from the observed orientation correlation between α-Zr and δ-hydride. Neutron diffraction line profile analysis and high-resolution transmission electron microscopy observations reveal a significant number of dislocations present in the δ-hydride, with an estimated average density one order of magnitude higher than that in the α-Zr matrix, which contributes to the accommodation of the substantial misfit strains associated with hydride precipitation in the α-Zr matrix. The present observations provide an insight into the behaviour of δ-hydride precipitation in zirconium alloys and may help with understanding the induced embrittling effect of hydrides.

UOW Authors


  •   Wang, Zhiyang (external author)
  •   Garbe, Ulf (external author)
  •   Li, Hui Jun.
  •   Wang, Yanbo (external author)
  •   Studer, Andrew J. (external author)
  •   Sun, Guangai (external author)
  •   Harrison, Robert P. (external author)
  •   Dr Xiaozhou Liao, Xiaozhou (external author)
  •   Vicente Alvarez, M A. (external author)
  •   Santisteban, J R. (external author)
  •   Kong, Charlie (external author)

Publication Date


  • 2014

Citation


  • Wang, Z., Garbe, U., Li, H., Wang, Y., Studer, A. J., Sun, G., Harrison, R. P., Liao, X., Vicente Alvarez, M. A., Santisteban, J. R. & Kong, C. (2014). Microstructure and texture analysis of δ-hydride precipitation in Zircaloy-4 materials by electron microscopy and neutron diffraction. Journal of Applied Crystallography, 47 (1), 303-315.

Scopus Eid


  • 2-s2.0-84893318468

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4164&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3148

Has Global Citation Frequency


Number Of Pages


  • 12

Start Page


  • 303

End Page


  • 315

Volume


  • 47

Issue


  • 1

Place Of Publication


  • United States

Abstract


  • This work presents a detailed microstructure and texture study of various hydrided Zircaloy-4 materials by neutron diffraction and microscopy. The results show that the precipitated δ-ZrH1.66 generally follows the δ(111)//α(0001) and δ[ ]//α[ ] orientation relationship with the α-Zr matrix. The δ-hydride displays a weak texture that is determined by the texture of the α-Zr matrix, and this dependence essentially originates from the observed orientation correlation between α-Zr and δ-hydride. Neutron diffraction line profile analysis and high-resolution transmission electron microscopy observations reveal a significant number of dislocations present in the δ-hydride, with an estimated average density one order of magnitude higher than that in the α-Zr matrix, which contributes to the accommodation of the substantial misfit strains associated with hydride precipitation in the α-Zr matrix. The present observations provide an insight into the behaviour of δ-hydride precipitation in zirconium alloys and may help with understanding the induced embrittling effect of hydrides.

UOW Authors


  •   Wang, Zhiyang (external author)
  •   Garbe, Ulf (external author)
  •   Li, Hui Jun.
  •   Wang, Yanbo (external author)
  •   Studer, Andrew J. (external author)
  •   Sun, Guangai (external author)
  •   Harrison, Robert P. (external author)
  •   Dr Xiaozhou Liao, Xiaozhou (external author)
  •   Vicente Alvarez, M A. (external author)
  •   Santisteban, J R. (external author)
  •   Kong, Charlie (external author)

Publication Date


  • 2014

Citation


  • Wang, Z., Garbe, U., Li, H., Wang, Y., Studer, A. J., Sun, G., Harrison, R. P., Liao, X., Vicente Alvarez, M. A., Santisteban, J. R. & Kong, C. (2014). Microstructure and texture analysis of δ-hydride precipitation in Zircaloy-4 materials by electron microscopy and neutron diffraction. Journal of Applied Crystallography, 47 (1), 303-315.

Scopus Eid


  • 2-s2.0-84893318468

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4164&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3148

Has Global Citation Frequency


Number Of Pages


  • 12

Start Page


  • 303

End Page


  • 315

Volume


  • 47

Issue


  • 1

Place Of Publication


  • United States