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Titolo:
The effect of beta, beta ' and beta '' precipitates in a homogenised AA6063 alloy on the hot deformability and the peak hardness
Autore:
van de Langkruis, J; Kool, WH; Sellars, CM; van der Winden, MR; van der Zwaag, S;
Indirizzi:
Delft Univ Technol, Mat Sci Lab, NL-2628 AL Delft, Netherlands Delft Univ Technol Delft Netherlands NL-2628 AL 28 AL Delft, Netherlands Univ Sheffield, Dept Mat Engn, Sheffield S10 2TN, S Yorkshire, England Univ Sheffield Sheffield S Yorkshire England S10 2TN S Yorkshire, England Corus Res & Dev, Ijmuiden, Netherlands Corus Res & Dev Ijmuiden Netherlands s Res & Dev, Ijmuiden, Netherlands
Titolo Testata:
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
fascicolo: 1-2, volume: 299, anno: 2001,
pagine: 105 - 115
SICI:
0921-5093(20010215)299:1-2<105:TEOBB'>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
MG-SI ALLOYS; CONSTITUTIVE-EQUATIONS; DISSOLUTION;
Keywords:
Al-Mg-Si; constitutive modelling; particle dissolution modelling; hot deformation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Kool, WH Delft Univ Technol, Mat Sci Lab, Rotterdamseweg 137, NL-2628 AL Delft, Netherlands Delft Univ Technol Rotterdamseweg 137 Delft Netherlands NL-2628 AL
Citazione:
J. van de Langkruis et al., "The effect of beta, beta ' and beta '' precipitates in a homogenised AA6063 alloy on the hot deformability and the peak hardness", MAT SCI E A, 299(1-2), 2001, pp. 105-115

Abstract

The effect of beta'-, beta"-, and beta Mg-Si precipitates in the initial microstructure of an AA6063 alloy on the flow stress at elevated temperatures was studied using plane strain compression tests. The stress-strain curves were modelled with a general solute-dependent constitutive equation basedon the exponential saturation equation as proposed by Sah and the hyperbolic sine law. The solute content during testing was estimated using a finite-volume based numerical code for particle dissolution. It was found that inthe experimental regime investigated, beta" precipitates in the initial microstructure have no significant effect on the flow stress and peak hardness. Furthermore beta' precipitates in the initial microstructure increase the flow stress at 673 K and decrease the corresponding peak hardness, but donot influence the flow stress at 773 K and corresponding peak hardness. The presence of beta precipitates results in a significant reduction of the flow stress and the peak hardness by reducing the solute content during deformation. Taking into account the solute content Calculated with the finite-volume model, the stress-strain curves can be modelled successfully with only one set of parameters for a range of pre-treatments. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 23/09/20 alle ore 12:54:38