3104铝合金高温热压缩变形流变行为研究  

Study on Flow Behavior of 3104 Aluminum Alloy During Hot Compression Deformation at Elevated Temperature

作　　者：蒙春标[1] 张辉[1] 吴文祥[2] 李落星[1] 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082 [2]苏州有色金属研究院有限公司,江苏苏州215026

出　　处：《热加工工艺》2008年第12期1-4,共4页Hot Working Technology

基　　金：中国铝业公司科技发展基金资助项目(2006KJA08-01)

摘　　要：在Gleeble-1500热模拟机上对3104铝合金进行热压缩变形实验,变形温度为300～500℃,变形速率为0.01～20s-1。结果表明:在低应变速率条件下,流动应力随着应变的增加而增大,达到峰值后趋于平稳,表现出动态回复特征;而在高应变速率条件下,随着应变的增加,流动应力出现锯齿波动,达到峰值后逐渐下降,表现出不连续动态再结晶特征。本构分析表明:可以采用双曲正弦来描述3104铝合金高温热压缩变形流变行为,热变形激活能为215kJ/mol。The hot compression deformation test of 3104 aluminum alloy at elevated temperature was performed on Gleeble-1500 system under the deformation temperature range from 300 ℃ to 500 ℃ the and strain rates from 0.01 s-1 to 20s-1. The results show that the flow stress of 3104 aluminum alloy increases with strain increasing and tends to constant after a peak value at lower strain rate, showing dynamic recover. The flow stress fluctuates in sawtooth and decreases after a peak value with strain increasing at higher strain rate, showing discontinuous dynamic recrystallization. Constitutive analysis shows that the peak stress can he represented by a Zener-Hollomon parameter in the hyperbolic-sine-type equation, the hot deformation activation energy is 215 k J/mol.

关 键 词：3104铝合金 热压缩变形 流变应力 动态再结晶 

分 类 号：TG146.21[一般工业技术—材料科学与工程]