Relative Stability of Deformed Cube in Warm and Hot Deformed AA6022: Possible Role of Strain-Induced Boundary Migration

Raveendra, S. T.; Paranjape, Harshad M.; Mishra, Sushil; Weiland, Hasso; Doherty, R.D.; Samajdar, I.

doi:10.1007/s11661-009-9898-x

Cited by 13 publications

(3 citation statements)

References 63 publications

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“…This is not a classical SIBM, where a new recrystallized grain bulges out of the existing grain boundary within a deformed structure, [55][56][57] but appears to be more of a uniform boundary movement. 50,55) The latter is expected 55) to be ineffective in reducing internal defect density and that is apparent from the high resolution EBSD scans -see Fig. 8(a).…”

Section: Discussionmentioning

confidence: 88%

“…Recrystallization can be defined as creation of 'strain free' grains above a minimum size. 49,50) The EBSD typically classifies the strain-free grains from misorientation build-up. Following such conventions, 49,50) no signature of recrystallization was apparent after the respective recovery treatments.…”

Section: Resultsmentioning

confidence: 99%

“…The other interesting point, which appears confusing in the first glance, is the 'direction' of coarsening or of uniform SIBM. Such a phenomena is expected as orientation with lower stored energy migrates into neighbouring orientation with higher stored energy: examples, cube growing into non-cube orientations during warm working of fcc aluminium 50) or coarsening of RD// <110> at the early recrystallization stages of LC steel.…”

Section: Discussionmentioning

confidence: 99%

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Orientation Dependent Recovery in Interstitial Free Steel

Khatirkar

Vadavadagi²,

Shekhawat³

et al. 2012

ISIJ Int.

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Cold rolled (40, 60 and 80% thickness reductions from hot-band) interstitial free (IF) steel samples were recovered at 500°C for different times (15 min to 32 h). The recovery kinetics, studied through a combination of X-ray line profile analysis and high resolution electron diffraction, were best represented by logarithmic relationship. Though the kinetics was dependent on the prior deformation, γ (ND//<111>) fibre clearly had stronger recovery than θ (ND//<100>) fibre. Recovery was observed, statistically to create grain interior strain localizations: an orientation independent phenomenon. Increase in misorientation across such strain localizations was, however, orientation dependent. This was responsible for enhanced in-grain misorientation in recovered γ-fibre grains/bands. Extended recovery of 80% pre-deformed samples also led to coarsening of γ-fibre bands: strain induced boundary migration (SIBM) or uniform movement of γ-fibre boundaries into neighbouring non γ-fibre orientations.

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