摘要
采用Gleeble-1500热模拟机进行圆柱体压缩实验,研究了3003铝合金在变形温度为300～500℃、应变速率为0.01～10 s-1、真应变为0～0.8条件下的流变应力特征。结果表明,流变应力随温度升高而降低,随应变速率的提高而增大;在应变速率小于10 s-1时,3003铝合金首先出现加工硬化,流变应力达到峰值后单调下降,趋于平稳,表现出动态回复的特征;而在应变速率为10 s-1、变形温度在350℃以上时,合金发生了局部动态再结晶;可用Zener-Hollomon参数的双曲正弦形式来描述3003铝合金热压缩变形时的流变应力行为。
The cylindrical compression tests was carried out by using Gleeble 1500 system, the flow stress feature of 3003 aluminium alloy under hot deformation was investigated under the condition of temperature 300-500℃ ,strain rate 0.01-10 s^-1 and true strain 0-0.8.The results show that the flow stress increases with the decrease of temperature and the increase of strain rate ;when strain rate is less than 10 s^-1,the deformation of 3003 alloy shows working hardening,flow stress is up to a peak stress followed by a monotomic decrease to a steady state value,showing dynamic recovery;when strain rate is 10 s^-1 and temperature is higher than 350℃ ,the flow curve exhibits partial dynamic recrystallization. The flow stress of 3003 alloy during hot compression deformation can be represented by a Zener-Hollomon parameter of the hyperbolic sine form.
出处
《热加工工艺》
CSCD
北大核心
2007年第6期12-14,17,共4页
Hot Working Technology
基金
中国铅业公司科技发展基金资助项目(2006KJA08)
