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首页> 外文会议>International Conference on Manufacturing Engineering and Technology for Manufacturing Growth >The Flow Stress Behavior and Constitutive Equation of Nanometric Al_2O_3 Particulate Reinforced Al Alloy Matrix Composites
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The Flow Stress Behavior and Constitutive Equation of Nanometric Al_2O_3 Particulate Reinforced Al Alloy Matrix Composites

机译：纳米Al_2O_3颗粒增强Al合金基质复合材料的流量应力行为和组成方程

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摘要

The flow stress behavior and constitutive equation of the nanometric Al_2O_3 particulate reinforced Al alloy matrix composites were investigated in the temperature range from 590 k-710 k, and at the strain rates range from 0.01 s~(-1) - 1 s~(-1). Hot compression tests were carried out with thermal simulation machine Gleeble-1500. The results showed that the values of the true stresses rose rapidly and then held constant to some extent after attaining the peak values with the increasing strains at different deformation condition. The flow stress for the composites increased with increasing strain rate, which means that the experimental material is a sensitive material of positive strain rate, and decreased with decreasing temperature. Dynamic recovery and dynamic recrystallization occurred during hot compression of the composites. The constitutive equation represented by a Zener-Hollomon parameter in an exponent-type and the deformation activation energy are as follows respectively: σ=71.43 ln{(Z/4.37×10~(11))~(1/5.94) + [(Z/4.37×10~(11))~(2/5.94)+1]~(1/2)}, Q=197 KJ mol~(-1).
机译：在590k-710k的温度范围内研究了纳米Al_2O_3颗粒增强Al合金基质复合材料的流量应力行为和本构体等式，在0.01s〜（-1） - 1 s〜（ - 1）。热压缩试验采用热仿真机GLEEBLE-1500进行。结果表明，真正应力的值快速上升，然后在某种程度上保持恒定在不同变形条件下的菌株的峰值。复合材料的流量应变随着应变率的增加而增加，这意味着实验材料是阳性应变率的敏感材料，并且随着温度的降低而降低。在复合材料的热压缩期间发生动态恢复和动态再结晶。由指数型和变形活化能量中的齐纳-Hollomon参数表示的本构式等式如下：σ= 71.43ln {（z / 4.37×10〜（11））〜（1 / 5.94）+ [（ Z / 4.37×10〜（11））〜（2 / 5.94）+1]〜（1/2）}，q = 197 kj mol〜（-1）。

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