A constitutive model for the flow stress behavior and microstructure evolution in aluminum alloys under hot working conditions - with application to AA6099

Hallberg, Håkan (författare): Lund University,Lunds universitet,Hållfasthetslära,Institutionen för byggvetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Solid Mechanics,Department of Construction Sciences,Departments at LTH,Faculty of Engineering, LTH

(creator_code:org_t)

Elsevier BV, 2019
2019
Engelska 10 s.
Ingår i: Applied Mathematical Modelling. - : Elsevier BV. - 0307-904X. ; 81, s. 253-262

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Abstract Ämnesord

Stäng

A constitutive model for aluminum alloys under hot working conditions is proposed. The elastic-viscoplastic model is implemented in a finite strain continuum mechanical framework. The model accounts for the interplay between dynamic recovery and recrystallization during hot working of aluminum alloys and central aspects of microstructure evolution such as grain/subgrain size and dislocation density. The proposed model is generic in the sense that it can be used for arbitrary aluminum alloys, but in order to demonstrate its capabilities, the model is calibrated to a newly developed AA6099 alloy in the present study. The model is thoroughly discussed and details on the numerical implementation as well as on the calibration of the model against experimental data are provided.

A constitutive model for aluminum alloys under hot working conditions is proposed. The elastic-viscoplastic model is implemented in a finite strain continuum mechanical frame- work. The model accounts for the interplay between dynamic recovery and recrystalliza tion during hot working of aluminum alloys and central aspects of microstructure evolution such as grain/subgrain size and dislocation density. The proposed model is generic in the sense that it can be used for arbitrary aluminum alloys, but in order to demonstrate its capabilities, the model is calibrated to a newly developed AA6099 alloy in the present study. The model is thoroughly discussed and details on the numerical implementation as well as on the calibration of the model against experimental data are provided.

Av författaren/redakt...: Hallberg, Håkan; Chamanfar, Ahmad; Nanninga, Nichol ...

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