基于克里金方法的6013铝合金多道次降温热压缩变形行为建模

Modeling for Multi-pass Temperature-Drop Hot Compression Behavior of 6013 Aluminum Alloy Based on Kriging Method

为量化分析多道次降温热压缩变形过程中流变应力在加工参数影响下的变化规律,以实现对产品成型过程的合理控制,研究了6013铝合金的多道次降温热压缩变形行为;基于试验数据和克里金方法构建了该变形行为的模型。结果表明:在多道次降温热压缩变形过程中,变形温度对流变应力具有显著影响,流变应力随着变形温度的降低呈台阶状升高;基于克里金方法构建的多道次降温热压缩变形行为模型具有较高的预测精度与稳定性,能够很好地描述多道次热压缩变形过程。

In order to quantitatively analyze change rules of flow stress affected by processing parameters during multi-pass hot compression deformation,and realize the reasonable control on forming process,multi-pass temperature-drop hot compression deformation behavior of 6013 aluminum alloy was studied.Based on experimental data and Kriging method,a model was constructed for describing the deformation behavior.The results show that flow stress is significantly affected by deformation temperature during multi-pass temperature-drop hot compression deformation.With the increase of deformation temperature,the flow stress increases in approximately stair-stepping shape.The hot compression deformation behavior model built based on Kriging method has relatively high prediction accuracy and stability,and it can describe the multi-pass hot compression deformation process very well.