Elsevier

Scripta Materialia

Volume 67, Issue 9, November 2012, Pages 752-755
Scripta Materialia

Hydrogen-induced microstructure, texture and mechanical property evolutions in a high-pressure torsion processed zirconium alloy

https://doi.org/10.1016/j.scriptamat.2012.07.033Get rights and content

The gaseous hydriding-induced evolutions of the microstructure, texture and mechanical properties of Zircaloy-4 processed by high-pressure torsion (HPT) were assessed. Much δ-ZrH1.66 precipitation at 15 atm (21%) incurred significant hardening of vacuum-annealed HPT samples, and pure ε-ZrH2 obtained at 20 atm showed a superior microhardness of 470 HV0.3 and a low fracture toughness of 0.63 MPa m1/2. The δ-hydrides presented strong (1 1 1) texture and followed the (0 0 0 1)α-Zr//{1 1 1}δ-ZrH1.66 orientation relationship with the α-Zr matrix. During hydriding, α-Zr recrystallization texture was developed from the initial deformation texture.

References (24)

  • N.A.P. Kiran Kumar et al.

    J. Nucl. Mater.

    (2010)
  • W. Qin et al.

    Acta Mater.

    (2011)
  • J.R. Santisteban et al.

    Acta Mater.

    (2010)
  • Y.B. Wang et al.

    Scripta Mater.

    (2010)
  • A.P. Zhilyaev et al.

    Prog. Mater. Sci.

    (2008)
  • Z.Y. Wang et al.

    Mater. Lett.

    (2012)
  • A.J. Studer et al.

    Physica B

    (2006)
  • A.P. Zhilyaev et al.

    Scripta Mater.

    (2001)
  • J.H. Huang et al.

    Mater. Sci. Eng. A

    (1993)
  • L. Saintoyant et al.

    Scripta Mater.

    (2011)
  • V.D. Hiwarkar et al.

    J. Nucl. Mater.

    (2011)
  • G.J.C. Carpenter

    J. Nucl. Mater.

    (1973)
  • Cited by (16)

    • How semi-coherent b.c.c. hydride interfacial interactions affect the inelastic deformation and fracture behavior of h.c.p. zirconium alloys

      2019, Mechanics of Materials
      Citation Excerpt :

      These local effects occur due to the interfacial planes having different lattice parameters and atomic arrangements between the parent and hydride phases (M.P. Puls, 1991). Along the interfaces between the close-packed planes, which have misorientation dislocations, both misfit strains and orientations relations (ORs) have to be physically accounted for to physically represent the semi-coherent resultant interfaces between the different phases (Motta et al., 2007; Porter et al., 2009; Wang et al., 2012; Gu and Zhang, 2014; Pilania et al., 2014). Our objective in this paper, therefore, is to investigate how local microstructural characteristics, such as different crystalline phases, misfit strains, hydride morphologies, and dislocation density accumulation can affect crack nucleation and growth in zirconium alloys with β b.c.c. hydrides.

    • Study of the microstructure evolution of zirconium alloy during deuterium absorption at high temperature

      2017, Journal of Nuclear Materials
      Citation Excerpt :

      The ε hydride has a higher hydrogen content, and has a “herringbone” morphology composed of small twins [28]. It has been shown that the ε hydride has a lower fracture toughness than the δ hydride [29], and the formation of the ε hydride leads to a larger volume expansion and severe cracking [13]. For the γ hydride, it has been reported that its stability is affected by the cooling rate [30], temperature [31] and matrix microstructure [32].

    • Cr depletion of the second phase particles in a Zr-Sn-Nb-Fe-Cr alloy: A TEM and SIMS study

      2017, Journal of Nuclear Materials
      Citation Excerpt :

      It is evident that after the HPT processing, all samples maintained a single hcp α-Zr phase. Similar results have also been reported for Zr-4 [10,12,14]. However, it is quite different from the reports that the HPT processing of pure Zr [9,11] and Zr-2.5%Nb [13] resulted in α-Zr to ω-Zr phase transformation.

    View all citing articles on Scopus
    View full text