Microstructure of severely deformed Al–3Mg and its evolution during annealing

Morris, David G.; Muñoz-Morris, Ma Antonia

doi:10.1016/s1359-6454(02)00203-3

Cited by 182 publications

(113 citation statements)

References 16 publications

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“…New data was obtained by performing ECAP on Al-1050, Al-Zr and Al-Zr-Si-Fe alloys and HPT on Al-2024 and Al-3Mg-0.2Mn, TEM and SEM micrographs for several alloys processed by ECAP and HPT are presented in Figs 6-8. Grain size data for a range of other commercial and experimental alloys was obtained from [30,35,36,73,74,75,76,77,78]. The database contains a total of 21 alloys, in a total of 37 alloy-processing combinations, with strains ranging from 1 to 17 and with resulting grain sizes between 2 μm and 50 nm, the full database is presented at [79].…”

Section: Results and Analysis: Grain Size During Spdmentioning

confidence: 99%

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

et al. 2009

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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.

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Section: Results and Analysis: Grain Size During Spdmentioning

confidence: 99%

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

et al. 2009

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“…The grain length and width changed from 430 AE 30 to 345 AE 30 nm and from 150 AE 20 to 130 AE 20 nm, respectively. The reductions of the grain length and width were caused by the formations of grain and sub-grain boundaries from the cell walls by the dislocation rearrangements (recovery) [9]. The existence of many fringes within grains indicated that a high density of dislocations still exist (Fig.…”

Section: Grain Size and Microstrainmentioning

confidence: 99%

“…For Al alloys, most ECAP effort has focused on work strengthening Al-Mg alloys [6][7][8][9]. Little attention has been paid to precipitate strengthening Al-Zn-Mg 7000 series alloys [10,11], which are widely used for high strength structural applications such as aircrafts and sporting goods.…”

Section: Introductionmentioning

confidence: 99%

Microstructures and mechanical properties of ultrafine grained 7075 Al alloy processed by ECAP and their evolutions during annealing

Zhao¹,

Liao²,

Jin³

et al. 2004

Acta Materialia

891

264

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“…Grain Growth in a Nanocrystalline Al-Sc Alloythe thermal stability of the Al-Sc system with other alloy systems produced by ECAP. Figure 10 shows the effect of annealing temperature on the average grain radius for the present alloy together with published data on Al-3Mg, [23][24][25] AA3004 and AA1100 Al alloys 26) and a commercial purity 99.5% Al alloy. 27) These alloys were also produced by ECAP to varying equivalent strains ranging from 1-10.…”

Section: Discussionmentioning

confidence: 92%

Grain Growth in a Nanocrystalline Al-Sc Alloy

Hamilton

Ferry

2004

Mater. Trans.

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A sub-micron grained microstructure in an Al-0.2 mass% Sc alloy was produced by high strain deformation using Equal Channel Angular Pressing (ECAP). The alloy was solution treated prior to deformation, deformed by ECAP then aged at low temperature to produce a sub-micron grained microstructure with a large fraction of high angle grain boundaries (HAGB) decorated with fine Al 3 Sc particles. General grain stability and particle/grain boundary interactions were studied using scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), focussed ion beam (FIB) microscopy and transmission electron microscopy (TEM). The fine-grained microstructure was found to be highly stable during annealing at temperatures up to 500 C due to Zener pinning from stable Al 3 Sc particles. The volume fraction, f , and average radius, r, of particles and their rate of coarsening were found to have a strong influence on grain growth. It was found that the limiting grain size, R c , in the Al-Sc alloy may reasonably be predicted by the relation: R c ¼ 0:17r=f . This relation is known to be applicable for coarse-grained alloys (>1 mm) and indicates its validity for predicting the limiting grain size in sub-micron, particle-containing alloys.

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Microstructure of severely deformed Al–3Mg and its evolution during annealing

Cited by 182 publications

References 16 publications

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

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

Microstructures and mechanical properties of ultrafine grained 7075 Al alloy processed by ECAP and their evolutions during annealing

Grain Growth in a Nanocrystalline Al-Sc Alloy

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