Intergranular stresses in Zircaloy-2 with rod texture

Citation
Jwl. Pang et al., Intergranular stresses in Zircaloy-2 with rod texture, ACT MATER, 47(2), 1999, pp. 373-383
Citations number
29
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science",Metallurgy
Journal title
ACTA MATERIALIA
ISSN journal
13596454 → ACNP
Volume
47
Issue
2
Year of publication
1999
Pages
373 - 383
Database
ISI
SICI code
1359-6454(19990115)47:2<373:ISIZWR>2.0.ZU;2-V
Abstract
The intergranular strains in thermally and mechanically anisotropic Zircalo y-2 with rod texture have been measured in situ under uniaxial tension alon g the rod axis by neutron diffraction. An in-plane biaxial stress state was developed in the grains as deformation proceeded. The tensors describing t he stress state of the grains throughout the deformation process have been determined experimentally in the natural crystallographic axes system. Afte r 5% deformation, the stress tensor components of the grains, sigma(11) and sigma(33)-stresses acting along the [a]-axes and [c]-axes lying in the tra nsverse plane-are 230 +/- 20 MPa and -241 +/- 21 MPa, respectively. The ang ular dependence of the initial thermal residual stress state and the final deformed state have also been obtained. The elasto-plastic self-consistent model has been used to simulate the experiments and exhibits agreement with experiment. It appears that the introduction of basal slip {0001}[1210] co nsiderably improves the agreement with experiment. (C) 1999 Acta Metallurgi ca Inc. Published by Elsevier Science Ltd. All rights reserved.