Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 14    No. 3    June 2004

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Modeling of microstructural evolution and flow stress of
aluminium alloy during thermomechanical process
SHEN Jian(沈 健)1, G.Gottstein2

1. General Research Institute for Nonferrous Metals, Beijing 100088, China;
2. Institut für Metallkunde und Metallphysik, RWTH-Aachen, Germany

Abstract:The evolution of microstructural variables, including the densities of mobile dislocation, immobile dislocation at the cell interiors, immobile dislocation in the cell walls, as well as total dislocation density, of an Al-Mg-Si aluminium alloy during thermomechanical processing were simulated based on a three-internal-variables-model (3IVM) involving dislocation climb and interaction. Optimization was carried out to fit the calculated stress—strain curves to the experimental data of the Al-Mg-Si alloy with minimum mean deviation. Precipitations were taken into consideration of modeling. The stress—strain curves predicted by the kinetic equations of state in the 3IVM have a good agreement with the experimental data.

 

Key words: aluminium alloy; microstructure evolution; dislocation; modeling

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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