Evolution of textures in zirconium alloys deformed uniaxially at elevated temperatures

Rodríguez, A.; Jonas, John J.

doi:10.1007/bf02660871

Cited by 14 publications

(5 citation statements)

References 23 publications

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“…2,5,[20][21][22][23][24][25][26][27] Although the existence of deformation twinning is undisputed in Zr, 2,3, there are controversies on the severity and even the existence of deformation twinning in commercial Zr alloys. 30,36,37,39,41,45 Some researchers, including the present research group*, did not report [50][51][52][53][54][55][56] significant presence of deformation twins, while others have shown 2,3, significant role of twinning in commercial Zr alloys. Such differences in the formation of twins could be attributed to the possible differences in solute, especially in interstitial, content and also on the applied strain and strain path.…”

Section: Introductionmentioning

confidence: 71%

Deformation twinning in zircaloy 2

Sahoo

Hiwarkar

Samajdar

et al. 2010

Materials Science and Technology

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Fully recrystallised zircaloy 2 samples were subjected to different degrees of uniaxial compression. Grains of high Taylor factors showed {1012}〈1011〉 deformation twins, noticeable up to 13–16% compression. Twinning strongly affected the crystallographic texture and also brought in clear differences in stored energy and residual stress between the suspected parent and product grains/orientations of twinning. At later stages of deformation, where presence of twinning was insignificant, aforementioned heterogeneity was further supplemented by heterogeneity in microstructure – clear presence of fragmenting and non-fragmenting grains. Direct observations on twin fraction, twin deviation and twin continuity had shown an apparent peak in twinning by ∼7·5% compression, an observation explainable through a simple model of twin decay by in grain misorientation development.

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Section: Introductionmentioning

confidence: 71%

Deformation twinning in zircaloy 2

Sahoo

Hiwarkar

Samajdar

et al. 2010

Materials Science and Technology

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“…The simulations did include different slip-twin combinations, as in Table 2. The literature concerning deformation texture simulations of zirconium based alloys [26][27][28][29][30][31][32][33][34] clearly highlights the domination of prismatic slip with or without twin contributions. In the present study, the aim was to use all possible combinations of slip-twin systems (see Table 2) to arrive at a best fit slip-twin combination.…”

Section: Residual Stressmentioning

confidence: 99%

“…The texture developments in hexagonal systems, in general, are restricted to the pattern of individual pole figures [26][27][28][29][30][31][32][33] -patterns which are strongly affected by the c/a ratio. 41 Identification of the exact deformation fibre or fibres, if any, has never been highlighted or clarified.…”

Section: Developments In Deformation Texturementioning

confidence: 99%

“…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%

“…Studies on the development of deformation texture [17][18][19][20][21]25 and texture predictions 17,20,[26][27][28][29][30][31][32][33][34][35] are now almost routine in cubic materials. [17][18][19] Such studies are far more restricted and definitely are not routine in hexagonal systems.…”

Section: Introductionmentioning

confidence: 99%

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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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