Recovery of AlMg alloys: flow stress and strain-hardening properties

Verdier, M.; Bréchet, Y.; Guyot, P.

doi:10.1016/s1359-6454(98)00350-4

Cited by 130 publications

(90 citation statements)

References 20 publications

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“…[22,23] In these earlier studies, the behavior was attributed to multiplication of dislocations. Dislocation activity is expected to be restricted in cryomilled Al alloys given the complex microstructure, which includes supersaturated Mg solute, segregation of solute and impurities to grain boundaries, and the possible existence of nanoscale oxide/nitride dispersoids in the matrix.…”

Section: B Tensile Behaviormentioning

confidence: 96%

Deformation behavior of bimodal nanostructured 5083 Al alloys

Han

Lee

Witkin

et al. 2005

Metall Mater Trans A

245

120

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Cryomilled 5083 Al alloys blended with volume fractions of 15, 30, and 50 pct unmilled 5083 Al were produced by consolidation of a mixture of cryomilled 5083 Al and unmilled 5083 Al powders. A bimodal grain size was achieved in the as-extruded alloys in which nanostructured regions had a grain size of 200 nm and coarse-grained regions had a grain size of 1 m. Compression loading in the longitudinal direction resulted in elastic-perfectly plastic deformation behavior. An enhanced tensile elongation associated with the occurrence of a Lüders band was observed in the bimodal alloys. As the volume fraction of coarse grains was increased, tensile ductility increased and strength decreased. Enhanced tensile ductility was attributed to the occurrence of crack bridging as well as delamination between nanostructured and coarse-grained regions during plastic deformation.

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Section: B Tensile Behaviormentioning

confidence: 96%

Deformation behavior of bimodal nanostructured 5083 Al alloys

Han

Lee

Witkin

et al. 2005

Metall Mater Trans A

245

120

View full text Add to dashboard Cite

show abstract

“…Recovery involves multiple micro-mechanisms and unlike the standard microstructural features, is intrinsically difficult to quantify. 10,[27][28][29] The quantification of recovery typically involves changes in properties 10,27,[30][31][32][33][34][35][36] and/or microstructural features. 10,27,[37][38][39] While the former has limited sensitivity, the microstructural features affected by recovery often demand sophisticated measurements.…”

Section: Introductionmentioning

confidence: 99%

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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“…Quantification of dislocation densities in materials can be achieved through transmission electron microscopy (TEM). However, as heavily cold rolled steels develop a highly complex substructure, such evaluation cannot be accurately achieved and TEM is replaced by indirect methods like magnetic techniques, [1][2][3] X-ray line broadening, 4) X-ray peak resolution, 5) tensile stress 6,7) or Vickers hardness measurements. 8,9) Among these techniques, magnetic measurements have the advantage of being non-destructive in nature.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of Conventional and Non-destructive Characterization Techniques to Recovery and Recrystallization

Oyarzabal¹,

Gurruchaga²,

Martínez-de-Guerenu³

et al. 2007

ISIJ Int.

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The sensitivity and limitations of magnetic coercive field, hardness, metallographic measurements and electron back scattered diffraction analysis are studied and discussed in terms of monitoring recovery and the onset and evolution of recrystallization in a cold rolled low carbon steel. The magnetic coercive field shows much higher resolution than hardness measurements when measuring recovery. Hardness is almost insensitive to the microstructural changes taking place in the material during annealing treatments performed at low temperatures. The conditions under which the magnetic coercive field measurements can also be used to monitor recrystallized fraction are also discussed.

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Recovery of AlMg alloys: flow stress and strain-hardening properties

Cited by 130 publications

References 20 publications

Deformation behavior of bimodal nanostructured 5083 Al alloys

Deformation behavior of bimodal nanostructured 5083 Al alloys

Orientation Dependent Recovery in Interstitial Free Steel

Sensitivity of Conventional and Non-destructive Characterization Techniques to Recovery and Recrystallization

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