Modeling of microstructural evolution and flow stress of aluminium alloy during thermomechanical process

来源期刊：中国有色金属学报(英文版)2004年第3期

论文作者：沈健 G.Gottstein

文章页码：491 - 495

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

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.