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Observations on the zirconium hydride precipitation and distribution in Zircaloy-4

Journal Article


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Abstract


  • Hydride precipitation and distribution in hot-rolled and annealed Zircaloy-4 plate samples artificially induced by gaseous hydrogen charging were studied primarily by neutron tomography, scanning electron microscopy (SEM), and SEM-based electron backscattered diffraction techniques. The precipitated hydride platelet (δ-ZrH1.66) at a hydrogen pressure of 20 atm was found following the {111}δ-ZrH1.66//(0001) α-Zr with the surrounding α-Zr matrix. The microstructural characterization indicated that hydrides with a relatively uniform distribution were precipitated on the rolling-transverse section of the plate, whereas, on the normal-transverse section, a hydride concentration gradient was present with a dense hydride layer near the surface. Further, the neutron tomography investigations clearly identified the nonuniform spatial distribution of hydrides. Thin hydride layers preferentially formed on the sample surface, and the concentrated hydrides precipitating at the edges/corner of the sample were observed. The causes for the localized hydride accumulation were also discussed.

UOW Authors


  •   Wang, Zhiyang (external author)
  •   Garbe, Ulf (external author)
  •   Li, Hui Jun.
  •   Harrison, Robert P. (external author)
  •   Kaestner, Anders (external author)
  •   Lehmann, Eberhard (external author)

Publication Date


  • 2014

Citation


  • Wang, Z., Garbe, U., Li, H., Harrison, R. P., Kaestner, A. & Lehmann, E. (2014). Observations on the zirconium hydride precipitation and distribution in Zircaloy-4. Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, 45 (2), 532-539.

Scopus Eid


  • 2-s2.0-84899416097

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4184&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3168

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 532

End Page


  • 539

Volume


  • 45

Issue


  • 2

Place Of Publication


  • United States

Abstract


  • Hydride precipitation and distribution in hot-rolled and annealed Zircaloy-4 plate samples artificially induced by gaseous hydrogen charging were studied primarily by neutron tomography, scanning electron microscopy (SEM), and SEM-based electron backscattered diffraction techniques. The precipitated hydride platelet (δ-ZrH1.66) at a hydrogen pressure of 20 atm was found following the {111}δ-ZrH1.66//(0001) α-Zr with the surrounding α-Zr matrix. The microstructural characterization indicated that hydrides with a relatively uniform distribution were precipitated on the rolling-transverse section of the plate, whereas, on the normal-transverse section, a hydride concentration gradient was present with a dense hydride layer near the surface. Further, the neutron tomography investigations clearly identified the nonuniform spatial distribution of hydrides. Thin hydride layers preferentially formed on the sample surface, and the concentrated hydrides precipitating at the edges/corner of the sample were observed. The causes for the localized hydride accumulation were also discussed.

UOW Authors


  •   Wang, Zhiyang (external author)
  •   Garbe, Ulf (external author)
  •   Li, Hui Jun.
  •   Harrison, Robert P. (external author)
  •   Kaestner, Anders (external author)
  •   Lehmann, Eberhard (external author)

Publication Date


  • 2014

Citation


  • Wang, Z., Garbe, U., Li, H., Harrison, R. P., Kaestner, A. & Lehmann, E. (2014). Observations on the zirconium hydride precipitation and distribution in Zircaloy-4. Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, 45 (2), 532-539.

Scopus Eid


  • 2-s2.0-84899416097

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4184&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3168

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 532

End Page


  • 539

Volume


  • 45

Issue


  • 2

Place Of Publication


  • United States