【摘要】 建立了用于描述金属及颗粒增强金属基复合材料在半固态下一维等温轴对称压缩变形行为的理论模型。使用有限差分技术和铝合金的参数来进行模型计算。根据模型的计算结果 ,研究了应变速率、液体体积分数和液体粘度对金属在两平行板间半固态压缩变形力的影响。结果表明 ,液体粘度对变形力几乎没有影响 ,变形力随轴向应变速率绝对值的增加而增加 ,随液体体积分数的增加而明显减少。更多还原

【Abstract】 An isothermal one dimension model of axisymmetrical compression was proposed, which can describe the deformation of metal and particulate reinforced metal matrix composites(PMMCs) in the semi solid state. The finite differential technique and the parameters used to Al alloys were employed to calculate this model. The influences of strain rate, liquid volume fraction and liquid viscosity on the deformation force of semi solid compression of metals between two parallel plates were investigated according to the calculation results of the model. The results show that the deformation force of semi solid compression of metals increases with the increase of axial strain rate, decreases with the increase of liquid volume fraction, while the liquid viscosity has no effect on the deformation force.更多还原