中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 25 No. 12 December 2015 |
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Aerospace Research Institute of Materials and Processing Technology, Beijing 100076,China）
Abstract:The hot deformation behavior and microstructure evolution of 1460 Al-Li alloy were investigated by isothermal compression test conducted at various strain rates (10-3-10 s-1) and temperatures (573-773 K). The flow stress curves were corrected by considering the friction at the platen/specimen interface and the temperature change due to the deformation heating. The effects of strain, strain rate and temperature on the deformation behavior were characterized by the Zener-Hollomon parameter in a hyperbolic-sine equation, and the constitutive equations were established according to the peak flow stress associated with dynamic recovery, dynamic recrystallization and the dissolution of T1 phases. In the entire strain rate and temperature range, the prediction capabilities of the developed constitutive equation are proved to be feasible and effective with a linear correlation coefficient and an average absolute relative error coefficient of 0.9909 and 6.72%, respectively.
Key words: 1460 Al-Li alloy; friction correction; temperature rise correction; constitutive equation; hot deformation behavior
