3104铝合金高温热压缩过程的再结晶

Recrystallization of 3104 aluminum alloy during compression at elevated temperature

在Gleeble-1500热模拟机上对3104铝合金进行双道次等温热压缩实验,变形温度为400和500℃,变形速率为0.01和0.1 s-1,道次的变形量均为0.4,道次间保温时间为30、60和120 s。结果表明:3104铝合金在400℃以上的双道次热变形过程中,发生动态与静态软化。道次间的软化率随着变形温度和应变速率的增加,以及道次间停留时间的延长和道次间保持温度的升高而增大。运用双道次软化率建立了3104铝合金热变形再结晶模型,其再结晶激活能为155 kJ/mol。

Double-hit isothermal compression tests of 3104 aluminum alloy at 400 ℃ and 500 ℃ with a strain rate of 0.01 s-1and 0.1 s-1 and stain of 0.4 for each pass were conducted on a Gleeble-1500 simulator.The interval time between passes was 30 s,60 s and 120 s.It was found that the static softening fraction in the interpass duration increases with increasing deformation temperature,strain rate,holding temperature and the interval time.An empirical recrystallization model with the recrystallization activation energy of 155 kJ/mol was proposed based on experiment.