Substructures in aluminium from dynamic and static recovery

McQueen, H.J.; Evangelìsta, E.

doi:10.1007/bf01605405

Cited by 52 publications

(39 citation statements)

References 61 publications

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“…This repolygonization is such that the substructure is completely rearranged in a strain interval equalling the initial transient [225,236]. This is confirmed in tests with sudden change in T or m; [220]. Reduction in subgrain size is rapid since…”

Section: Introductionmentioning

confidence: 81%

“…Hot rolling, which is the highest tonnage industrial mechanical forming process, is usually achieved in multiple passes with intervals between, which permit static recovery (SRV) [220,262] or recrystallization (SRX) if m\ m CS (Fig. 36) [216,218,229,239].…”

Section: Multistage Processingmentioning

confidence: 99%

“…Despite the high level of DRV at the end of a hot working pass, SRV proceeds at a rate consistent with the dislocation density or the flow stress [216,218,220,267]. Initially, the dislocation density diminishes in the interior and in the SGB and finally enlargement of the subgrains follows [262].…”

Section: Multistage Processingmentioning

confidence: 99%

See 2 more Smart Citations

Current issues in recrystallization: a review

Doherty¹,

Hughes²,

Humphreys³

et al. 1997

Materials Science and Engineering: A

2,038

623

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The current understanding of the fundamentals of recrystallization is summarized. This includes understanding the as-deformed state. Several aspects of recrystallization are described: nucleation and growth, the development of misorientation during deformation, continuous, dynamic, and geometric dynamic recrystallization, particle effects, and texture. This article is authored by the leading experts in these areas. The subjects are discussed individually and recommendations for further study are listed in the final section. © 1997 Elsevier Science S.A.

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Section: Introductionmentioning

confidence: 81%

Section: Multistage Processingmentioning

confidence: 99%

See 1 more Smart Citation

Current issues in recrystallization: a review

Doherty¹,

Hughes²,

Humphreys³

et al. 1997

Materials Science and Engineering: A

2,038

623

View full text Add to dashboard Cite

show abstract

“…[27] (b) Continuous dynamic recrystallization (CDRX), [28,29] which is considered a one-stage process, without nucleation and without any large-scale migration of HABs; terminologies such as geometric recrystallization, [30] in-situ recrystallization, [31] rotation recrystallization, [32] extended recovery, [24,33] etc., are used for comparable mechanisms that differ in their details. The CDRX process results in a narrow distribution of microstructural sizes and the occurrence of a steady-state flow stress without any decline, [26,27,34] apart from the Taylor-factor softening [24,35] when strain exceeds the onset strain for the steady state.…”

Section: Discussionmentioning

confidence: 99%

On the Onset of a Steady State in Body-Centered Cubic Iron during Severe Plastic Deformation at Low Homologous Temperatures

Vorhauer

Pippan

2007

Metall Mater Trans A

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Armco Iron was severely deformed by means of a high-performance, high-pressure torsion (HPT) tool at a hydrostatic pressure of 5.4 GPa at low homologous temperatures, T m , between 0.08 and 0.40 T m . The flow stress was estimated from the measured torque during severe plastic deformation (SPD). At all investigated deformation conditions, a saturation in the flow stress at large strains without any decline was obtained. It is shown that this occurrence of a ''steady state'' at low homologous temperatures is significantly influenced by the deformation parameters, whereby an increase in deformation temperature or a decrease in strain rate results in a decrease in onset strain and an increase in flow stress in both the steady state and the size and aspect ratio of the structural elements. The Zener-Hollomon parameter is used to analyze the mechanical and microstructural properties as a function of the processing parameters; this shows that the investigated range of deformation conditions is divided into two regimes. For comparable high-deformation temperatures, the occurrence of a steady state is ascribed to a process similar to geometric dynamic recrystallization (DRX). Possible reasons for the occurrence of a different behavior in the low homologous temperature regime are discussed; the size of the crystallites formed during straining by the subdivision of the initial grains is considered to play an important role.

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“…polygonisation (Sellars, 1978;Urai and others, 1986;McQueen and Evangelista, 1988;Borthwick and others, 2013;Faria and others, 2014b). To simulate this numerically, the approach by Borthwick and others (2013) is implemented in the ELLE modelling platform.…”

Section: Recoverymentioning

confidence: 93%

Dynamic recrystallisation of ice aggregates during co-axial viscoplastic deformation: a numerical approach

et al. 2016

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ABSTRACT. Results of numerical simulations of co-axial deformation of pure ice up to high-strain, combining full-field modelling with recrystallisation are presented. Grain size and lattice preferred orientation analysis and comparisons between simulations at different strain-rates show how recrystallisation has a major effect on the microstructure, developing larger and equi-dimensional grains, but a relatively minor effect on the development of a preferred orientation of c-axes. Although c-axis distributions do not vary much, recrystallisation appears to have a distinct effect on the relative activities of slip systems, activating the pyramidal slip system and affecting the distribution of a-axes. The simulations reveal that the survival probability of individual grains is strongly related to the initial grain size, but only weakly dependent on hard or soft orientations with respect to the flow field. Dynamic recrystallisation reduces initial hardening, which is followed by a steady state characteristic of pure-shear deformation.

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Substructures in aluminium from dynamic and static recovery

Cited by 52 publications

References 61 publications

Current issues in recrystallization: a review

Current issues in recrystallization: a review

On the Onset of a Steady State in Body-Centered Cubic Iron during Severe Plastic Deformation at Low Homologous Temperatures

Dynamic recrystallisation of ice aggregates during co-axial viscoplastic deformation: a numerical approach

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