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采用数学建模方法得到了C919铝合金流变应力的本构模型,分析了合金在变形温度为350~470℃,应变速率为0.001~1.000 s-1范围内,变形温度和应变速率对合金流变应力和微观组织的影响。结果表明,C919铝合金的变形行为都接近稳态变形特征;在同一变形温度下,随着应变速率的逐渐增加,实验值与计算值的误差有增大的趋势,在低应变速率下通过数学建模得到的本构方程更加准确。
The constitutive model of flow stress of C919 aluminum alloy was obtained by using mathematical modeling method. The effects of deformation temperature and strain rate on the alloy flow at deformation temperature of 350-470 ℃ and strain rate of 0.001-1.000 s-1 were analyzed. Effect of stress and microstructure. The results show that the deformation behavior of C919 aluminum alloy is close to that of steady deformation. Under the same deformation temperature, the error of experimental value and calculated value tends to increase with the increase of strain rate. At low strain rate, The constitutive equation obtained by modeling is more accurate.