1. Simulation of low proportion of dynamic recrystallization in 7055 aluminum alloy
- Author
-
Xiao-dong Wu, Bin Liao, Jia-chen Li, Lingfei Cao, and Xiao-min Lin
- Subjects
Materials science ,Alloy ,Metals and Alloys ,chemistry.chemical_element ,engineering.material ,Geotechnical Engineering and Engineering Geology ,Condensed Matter Physics ,Compression (physics) ,Finite element method ,Grain size ,chemistry ,Aluminium ,Materials Chemistry ,engineering ,Dynamic recrystallization ,Composite material ,Deformation (engineering) ,Electron backscatter diffraction - Abstract
The hot deformation and dynamic recrystallization (DRX) behaviors of 7055 aluminum alloy were studied at temperatures of 390−470 °C and strain rates of 0.01−1 s−1. A low DRX fraction between 1% and 13% was observed by using EBSD technique. A modified JMAK-type DRX model was proposed for such low DRX fraction problems. The model was used together with commercial FEM software DEFORM-3D to simulate the hot compression of 7055 aluminum alloy. There was a good agreement between experimental and predicted DRX fractions and grain size with an average absolute relative error (AARE) of 13.7% and 6.3%, respectively. In order to further verify the validity of the proposed model, the model was also used to simulate DRX in industrial hot rolling of 7055 aluminum alloys. The results showed that the distribution of DRX fraction was inhomogeneous, and agreed with experimental observations.
- Published
- 2021