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

Authors

Zhiyang Wang, University of WollongongFollow
Ulf Garbe, Australian Nuclear Science and Technology Organisation
Huijun Li, University of WollongongFollow
Andrew J. Studer, Australian Nuclear Science And Technology Organisation
Robert P. Harrison, Australian Nuclear Science And Technology Organisation
Mark D. Callaghan, University Of WollongongFollow
Yanbo Wang, University Of Sydney
Xiaozhou Liao, University Of Sydney

RIS ID

64132

Publication Details

Wang, Z., Garbe, U., Li, H., Studer, A. J., Harrison, R. P., Callaghan, M. D., Wang, Y. & Liao, X. (2012). Hydrogen-induced microstructure, texture and mechanical property evolutions in a high-pressure torsion processed zirconium alloy. Scripta Materialia, 67 752-755.

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 δ-ZrH_1.66 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 HV_0.3 and a low fracture toughness of 0.63 MPa m^1/2. 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.