摘要
采用Gleeble-3500热模拟试验机对4045铝合金在变形速率为0.01～10s-1,变形温度为300～450℃条件下进行等温热压缩实验,研究了该合金的热变形行为及其热加工特性.结果表明:4045铝合金热变形过程的流变行为可用双曲正弦模型来描述,其平均激活能为189.93kJ/mol.基于动态材料模型(DMM)获得了4045铝合金的热加工图,并结合热加工图和金相显微组织分析得到了该合金在实验参数范围内较优的热加工工艺参数范围:加工温度为380～450℃,变形速率为0.1～0.3s-1.
Isothermal compression tests of 4045aluminum alloy were carried out at the strain rate range of 0.01～10s-1 and at the temperature range of 300～450℃ on Gleeble-3500system to study the hot deformation behavior and hot workability.The results show that the flow behavior of 4045aluminum alloy can be described by the hyperbolic-sine equation with the average activation energy of 189.93kJ/mol.The processing maps were calculated on the basis of the dynamic materials model（DMM）.The optimum processing parameters were obtained at strain rate range of around 0.1～0.3s-1 and deformation temperature range between 380°C and 450°C on the basis of processing map and microstructural evolution analysis.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第8期83-89,共7页
Journal of Hunan University:Natural Sciences
基金
国际科技合作计划项目(010S2010GR0739)
关键词
铝合金
热变形
材料动态模型
加工图
aluminum alloy
hot deformation
dynamic materials model
processing map
