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

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Date
2012-11-01
Journal Title
Journal ISSN
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Publisher
Elsevier Ltd.
Abstract
The gaseous hydriding-induced evolutions of the microstructure, texture and mechanical properties of Zircaloy-4 processed by high-pressure torsion (HPT) were assessed. Much delta-ZrH(1.66) precipitation at 15 atm (21%) incurred significant hardening of vacuum-annealed HPT samples, and pure epsilon-ZrH(2) obtained at 20 atm showed a superior microhardness of 470 HV(0.3) and a low fracture toughness of 0.63 MPa m(1/2). The delta-hydrides presented strong (1 1 1) texture and followed the (0 0 0 1)(alpha-Zr)//{1 1 1}(delta-ZrH1.66) orientation relationship with the alpha-Zr matrix. During hydriding, alpha-Zr recrystallization texture was developed from the initial deformation texture. Copyright © 2012 Acta Materialia Inc.
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Keywords
Recrystallization, Neutron diffraction, Hydrogen embrittlement, Zircaloy 4, Microhardness, Texture
Citation
Wang, Z., Garbe, U., Li, H. J., Studer, A. J., Harrison, R. P., Callaghan, M. D., Wang, Y. B., & Liao, X. (2012). Hydrogen-induced microstructure, texture and mechanical property evolutions in a high-pressure torsion processed zirconium alloy. Scripta Materialia, 67(9), 752-755. doi:10.1016/j.scriptamat.2012.07.033
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