Hot Deformation Behavior and Processing Map for New Al-Zn-Mg-Cu Alloy
TAO Le-xiao1, ZANG Jin-xin2, ZHANG Kun2, CHEN Hui-qin1
1. School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;
2. Beijing Institute of Aeronautical Materials,Beijing 100095,China
Abstract：The hot deformation behavior of a new Al-Zn-Mg-Cu high strength alloy was investigated by hot compression tests conducted on thermo-mechanical simulation experimental method at 300-450℃, strain rate 10-3-10s-1 and 50% height reduction. The processing maps of the alloy were established. Both of temperature and strain rate have a dramatic effect on flow stresses. The flow stress curves of the alloy present the features of steady-state dynamic recovery curve at the test conditions. The results of processing maps and microstructures show that the parameter range of 350-450℃ and 10-3-10-2s-1 is suitable to smaller strain(ε=0.1)casting structure features; and the parameter range of 300-450℃ and 10-3-10-1s-1 is suitable to larger strain(ε=0.5)forging structure features.
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2013, Vol. 0 
