摘要
采用Gleeble-1500热模拟机高温等温压缩试验，研究了一种新型Al-Cu-Li系合金在应变速率为0．01～10S、变形温度为3130～500℃条件下的流变应力特征,结果表明：流变应力随变形温度的升高而降低，随变形速率的提高而增大；采用Z参数的双曲正弦函数描述该合金高温变形的峰值流变应力，获得了峰值流变应力解析式，其热变形激活能为239．02kJ·mol^-1．
The flow stress behavior of a new type Al-Cu-Li system alloy during hot compression deformation was studied in the strain rate range from 0.01 to 10 s^-1 and the temperature range from 300 to 500℃ by isothermal compression test on a Gleeble 1500 thermal-mechanical simulator. The results show that the flow stress of this new type Al-Cu-Li system alloy decreases with the increase of deformation temperature and increases with the increase of strain rate. The peak flow stress during high temperature deformation can be represented by Z parameter in a hyperbolic sine function. The analytical expression of peak flow stress was fitted with the hot deformation activation energy of 239.02 kJ·mol^-1.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2006年第8期750-754,共5页
Journal of University of Science and Technology Beijing
关键词
铝锂合金
热压缩变形
流变应力
Z参数
Al-Cu-Li system alloy
hot compression deformation
flow stress
Z parameter
