The transition from discontinuous to continuous recrystallization in some aluminium alloys

Jazaeri, H.; Humphreys, F.J.

doi:10.1016/j.actamat.2004.03.030

Cited by 218 publications

(118 citation statements)

References 25 publications

Supporting

Mentioning

106

Contrasting

Unclassified

Order By: Relevance

“…Continuous recrystallization, which also has been termed ''rotation recrystallization,'' ''in-situ recrystallization,'' or ''extended recovery,'' is accompanied by a continuous increase in the misorientation of low-angle grain boundaries (LAGB) without (or very limited) migration of HAGB. Such a mechanism is common in the superplastic deformation of some high SFE metals, such as Al alloys, [16,17] Mg alloys, [18] and ferritic steels. [19][20][21] The significant effects of initial grain size on the post-DRX recrystallization in different materials has also been reported in a number of studies.…”

Section: A Dehghan-manshadi and Pd Hodgsonmentioning

confidence: 99%

Dependency of Recrystallization Mechanism to the Initial Grain Size

Dehghan-Manshadi

Hodgson

2008

Metall Mater Trans A

View full text Add to dashboard Cite

The effect of initial grain size on the recrystallization behavior of a type 304 austenitic stainless steel during and following hot deformation was investigated using hot torsion. The refinement of the initial grain size to 8 lm, compared with an initial grain size of 35 lm, had considerable effects on the dynamic recrystallization (DRX) and post-DRX phenomena. For both DRX and post-DRX, microstructural investigations using electron backscattered diffraction confirmed an interesting transition from conventional (discontinuous) to continuous DRX with a decrease in the initial grain size. Also, there were unexpected effects of initial grain size on DRX and post-DRX grain sizes.

show abstract

Section: A Dehghan-manshadi and Pd Hodgsonmentioning

confidence: 99%

Dependency of Recrystallization Mechanism to the Initial Grain Size

Dehghan-Manshadi

Hodgson

2008

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

“…Most available models on grain refinement during SPD follow the strategy of considering the gradual evolution of the microstructure starting from low strains up to the very high strains typical of SPD [28,31,41,42,43]. An important factor in these models is the details of cell wall and subgrain boundary formation.…”

Section: General Model Structure and Main Assumptionsmentioning

confidence: 99%

“…Low misorientation (1°) boundaries form a 3-d or 2-d cell structure which tends to remain equiaxed during deformation and are sometimes referred to as "incidental dislocation boundaries" [28]. Subgrain size tends to be constant at larger strains, and this is interpreted in terms of a dynamic equilibrium between dislocation generation and annihilation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Predicting grain refinement by cold severe plastic deformation in alloys using volume averaged dislocation generation

et al. 2009

View full text Add to dashboard Cite

The grain refinement during severe plastic deformation (SPD) is predicted using volume averaged amount of dislocations generated. The model incorporates a new expansion of a model for hardening in the parabolic hardening regime, in which the work hardening depends on the effective dislocation free path related to the presence of non shearable particles and solute-solute nearest neighbour interactions.These two mechanisms give rise to dislocation multiplication in the form of generation of geometrically necessary dislocations and dislocations induced by local bond energies. The model predicts the volume averaged amount of dislocations generated and considers that they distribute to create cell walls and move to existing cell walls/grain boundaries where they increase in the grain boundary misorientation. The model predicts grain sizes of Al alloys subjected to SPD over 2 orders of magnitude. The model correctly predicts the considerable influence of Mg content and content of nonshearable particles on the grain refinement during SPD.

show abstract

“…It can be noted that localization of plastic deformation typical for pure aluminium or low-alloyed aluminium alloys may lead to a bimodal grain size distribution ( Figure 3c) [16,17]. The composite shows a unimodal grain size distribution (Figure 3b,d), indicating continuous dynamic recrystallization during plastic deformation [18]. This phenomenon is also confirmed by a considerably higher fraction of low-angle grain boundaries (LAB) in the alloy AA6082 after deformation (Table 1) compared with the composite (80% and 51%, respectively).…”

Section: Resultsmentioning

confidence: 99%

Influence of Combined Helical and Pass Rolling on Structure and Residual Porosity of an AA6082-0.2 wt % Al2O3 Composite Produced by Casting with Ultrasonic Processing

Naydenkin

Мишин

Khrustalyov

et al. 2017

Metals

View full text Add to dashboard Cite

Abstract:The influence of combined (helical and pass) rolling on the structure, residual porosity, and microhardness of an AA6082-0.2 wt % Al 2 O 3 composite produced by casting with ultrasonic processing was evaluated in comparison with the matrix alloy. The nanosized alumina particles resulted in a more homogeneous and fine-grained structure of the composite after deformation with higher microhardness in comparison with the matrix alloy. However, the residual porosity of the AA6082-0.2 wt % Al 2 O 3 composite was retained even after combined rolling on the level typical of alloys produced by the method, which may be a result of relatively low stresses and strains introduced during deformation.

show abstract

The transition from discontinuous to continuous recrystallization in some aluminium alloys

Cited by 218 publications

References 25 publications

Dependency of Recrystallization Mechanism to the Initial Grain Size

Dependency of Recrystallization Mechanism to the Initial Grain Size

Predicting grain refinement by cold severe plastic deformation in alloys using volume averaged dislocation generation

Influence of Combined Helical and Pass Rolling on Structure and Residual Porosity of an AA6082-0.2 wt % Al2O3 Composite Produced by Casting with Ultrasonic Processing

Contact Info

Product

Resources

About