Texture Analysis in Zircaloy Cladding Tube Material for Nuclear Fuel

Roux, S. De; Merwe, D.J. Van der

doi:10.4028/www.scientific.net/msf.157-162.1455

Cited by 2 publications

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“…Studies on texture developments during cold working of Zr-2.5% Nb are mainly limited to the determination of two-dimensional pole figures and not in terms of orientation distribution functions (ODFs) [20,28,[33][34][35][36][37][38]. Microtexture development in cold deformed single phase and two-phase Zr alloys, has largely remained as an uncharted territory.…”

Section: Introductionmentioning

confidence: 99%

Explaining absence of texture development in cold rolled two-phase Zr–2.5 wt% Nb alloy

et al. 2003

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In the present study, two distinct starting microstructures of Zr-2.5 wt% Nb have been used: (1) single-phase α hcp martensitic structure; and (2) two-phase, 10% bcc β and rest hcp α, Widmanstätten structure. In the second case, two types of α were present-near grain boundary predominantly single-phase α (about 5% of the total α) and α plates in an apparently continuous β matrix. Both (1) and (2) had similar starting crystallographic texture of the hcp α phase and were deformed by unidirectional and cross rolling. In the two-phase structure the changes in the bulk texture on cold rolling was found to be insignificant, while in the single-phase material noticeable textural changes were observed. Taylor type deformation texture models predicted textural changes in single-phase structure but failed to predict the observed lack of textural development in the two-phase material. Microtexture observations showed that α plates remained approximately single crystalline after cold rolling, while the β matrix underwent significant orientational changes. Relative hardening, estimated by X-ray peak broadening, was observed mainly in β phase; while aspect ratio of α plates remained unchanged with cold rolling-indicating absence of effective macroscopic strain in the hcp α plates. Based on microstructural and microtextural observations, a simple model is proposed in which the plastic flow is mainly confined to the β matrix within which the α plates are subjected to 'in-plane rigid body rotation'. The model explains the observed lack of textural developments in the two-phase structure.

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Section: Introductionmentioning

confidence: 99%

Explaining absence of texture development in cold rolled two-phase Zr–2.5 wt% Nb alloy

et al. 2003

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“…But in the case of hcp materials no such specific deformation fibre(s) has been identified or reported. 4,26,27,[41][42][43][44][45][46] In deformation texture predictions, controversies still exist over the slip-twin combinations and their relative contributions in hcp materials, 28,[30][31][32][33][34][35][36][37][38][39][40] in general, and Zr alloys, in particular. [36][37][38][39][40] Our understanding of the microstructural and stress developments in cubic system during plastic deformation has come a long way, 22 but even then a complete understanding is yet to emerge.…”

Section: Introductionmentioning

confidence: 99%

Deformation texture and microtexture developments in a cold rolled single phase hexagonal Zircaloy 2

Kumar¹,

Vanitha²,

Samajdar³

et al. 2006

Materials Science and Technology

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A single phase hexagonal close packed Zircaloy 2 was cold deformed to different reductions by laboratory rolling. Systematic characterisations of the structural developments were carried out. Bulk texture developments were gradual, strongest developments being noticed at the highest strain. Although formation of well defined deformation fibre(s) could not be identified, overall developments in deformation texture were best captured through Taylor type models incorporating only prismatic slip. Strain localisations were observed as single or double walled dislocation structures at approximately 45 and 60u to the rolling direction. Such strain localisations were always associated with significant lattice reorientations or misorientation developments. Relative softening in lattice strain, observed at the higher reductions, can possibly be explained by the appearance of extensive strain localisations and the associated concurrent local dynamic recovery. The grains or orientations with dominant presence of strain localisations could be indirectly related to negative textural softening.

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Texture Analysis in Zircaloy Cladding Tube Material for Nuclear Fuel

Cited by 2 publications

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Explaining absence of texture development in cold rolled two-phase Zr–2.5 wt% Nb alloy

Explaining absence of texture development in cold rolled two-phase Zr–2.5 wt% Nb alloy

Deformation texture and microtexture developments in a cold rolled single phase hexagonal Zircaloy 2

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