Rheological behavior and microstructure of 2A70 aluminum alloy during plane strain compression
The plane strain compression tests were conducted on 2A70 aluminum alloy by the Gleeble-3500 thermal simulation testing machine,with the deformation temperature,strain rate and deformation amount set as 350℃-500 ℃,0.01 s-1-1 s-1,and 65％,re-spectively.The rheological behavior and microstructural evolution were also studied under plane strain compression.The results show that the rheological stress increases with the de-crease of deformation temperature and decreases with the decrease of strain rate.A constitu-tive equation for 2A70 aluminum alloy was established to describe the relationship between deformation temperature,strain rate,and rheological stress.The Z-value can describe the degree of dynamic recrystallization,which decreases as the Z-value increases.The degree of dynamic recrystallization is relatively weak under low temperature and high speed conditions.The deformed tissue contains textures such as Brass,Goss,and Cube.The microstructure and properties of 2A70 aluminum alloy can be controlled by changing the hot working process.
万方数据
维普
