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研究了2vol%Mg2B2O5w/6061铝合金复合材料在热变形过程中,不同变形温度、应变速率下流变应力的变化,并通过计算机拟合建立了热压缩变形本构方程。结果表明,压缩变形过程中复合材料的流变应力随着变形温度的升高而降低,随着应变速率的增大而升高。当应变速率在0.01~1.00/s之间时,材料呈现出动态回复特征。复合材料在热变形过程中的应变速率和流变应力关系符合双曲正弦函数关系。
The changes of the flow stress of 2vol% Mg2B2O5w / 6061 aluminum alloy composites during thermal deformation at different deformation temperature and strain rate were studied. The constitutive equations of thermal compression deformation were established by computer simulation. The results show that the flow stress of the composites decreases with the increase of the deformation temperature and increases with the increase of the strain rate. When the strain rate between 0.01 ~ 1.00 / s, the material showed a dynamic recovery characteristics. The relationship between the strain rate and the flow stress of the composites during the thermal deformation conforms to the hyperbolic sine function.