Al-Fe-V-Si合金高温变形热模拟

Hot simulation of high temperature deformation Al-Fe-V-Si alloy

采用Gleebe 1 5 0 0热模拟机 ,对喷射沉积Al Fe V Si合金在温度为 35 0～ 5 5 0℃、应变速率为1× 1 0 - 4 ～ 1× 1 0 - 2 s- 1 、最大变形程度为 5 0 %的条件下 ,进行高温压缩热模拟实验研究 .在实验基础上 ,分析了合金高温变形时的变形激活能和应力指数以及流变应力与应变速率、变形温度之间的关系 ,为确定该合金的挤压温度提供了实验依据 .实验结果表明 ,该材料具有较高的应力指数和变形激活能 ,而且在 480℃下具有较低的变形抗力 ,又能保证挤压后产品有较好的力学性能 ,因此 ,可以考虑将挤压温度定在

Compressive deformation hot simulation test of spray deposition Al Fe V Si alloy was performed on Gleebe 1 500 hot simulator over the range of deformation temperature from 350 ℃ to 550 ℃, strain rate from 10 -4 s -1 to 10 -2 s -1 , maximium deformation degree 50%. After analyzing stress exponent, deformation activation energy, the relationship between flow stress and deformation temperature as well as strain rate on the basis of the experiment, the appropriate extrusion temperature of the alloy was proposed. The results showed this material contains very high stress exponent and deformation activation energy, but lower deformation resistance, and possesses very good mechanical properties after extrusion at 480 ℃. Therefore, the appropriate extrusion temperature of this material was proposed to be about 480 ℃.[