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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/11242

Title: Resistance to hydride formation in zirconium: An emerging possibility
Authors: KRISHNA, KVM
SAIN, A
SAMAJDAR, I
DEY, GK
SRIVASTAVA, D
NEOGY, S
TEWARI, R
BANERJEE, S
Keywords: wt-percent nb
grain-boundary-character
hydrogen embrittlement
intergranular corrosion
stainless-steel
oriented hydrides
alpha-zirconium
habit planes
bend tests
precipitation
Issue Date: 2006
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Citation: ACTA MATERIALIA, 54(18), 4665-4675
Abstract: Fully recrystallized Zircaloy 2 was subjected to hydride formation through gaseous hydrogen charging. Primarily grain boundary hydrides were observed. To describe the relative preference, if any, a hydride preference index (HPI) was proposed: HPIQ = f(h,Q)/f(r-Q), where f(h,Q) and f(r,Q) are the respective fractions of Q-type boundary present among hydrided boundaries and present in the total sample. HPIQ values were estimated from 1200 distinctly hydrided boundaries and showed a clear preference for hydride formation and grain boundary nature. Coincident site lattice boundaries were, in general, resistant to hydride formation. Elastically harder grains or orientations also arrested the formation of hydrides. The study indicates a clear possibility: a previously unknown/uncharted possibility of suitably 'tailored' zirconium microstructures, microstructures with reduced potential for 'hydride embrittlement' and delayed hydrogen cracking. (c) 2006 Acta Materialia Inc.
URI: http://dx.doi.org/10.1016/j.actamat.2006.06.004
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11242
http://hdl.handle.net/10054/11242
ISSN: 1359-6454
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