Al-Fe-V-Si合金高温变形热模拟

来源期刊：中南大学学报(自然科学版)2000年第1期

论文作者：黎文献 杨军军 肖于德

文章页码：56 - 59

关键词：Al-Fe-V-Si合金;压缩变形;流变应力;变形激活能

Key words：Al-Fe-V-Si alloy; compressive deformation; flow stress; deformation activation energy

摘    要：采用Gleebe-1500热模拟机,对喷射沉积Al-Fe-V-Si合金在温度为350 ~ 550℃、应变速率为1×10^-4~1×10^-2s^-1、最大变形程度为50%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480℃左右为宜.

Abstract: Compressive deformation hot simulation test of spray deposition Al-Fe-V-Si alloy was performed on Gleebe1 500 hot simulator over the range of deformation temperature from 350℃to 550℃, strain rate from 10^-4s^-1to 10^-2 s^-1, maximium deformation degree 50%. After analyzingstress 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℃.