Dynamic recrystallization of Ti−6Al−2Zr−1Mo−1V in β forging process
(1. School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China;
2. School of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics,
Nanjing 210016, China)
2. School of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics,
Nanjing 210016, China)
Abstract: The dynamic recrystallization (DRX) behavior of Ti−6Al−2Zr−1Mo−1V alloy was investigated at deformation temperature of 1000−1100 °C and strain rate of 10−3−1.0 s−1 by using compression test. The results show that discontinuous dynamic recrystallization (DDRX) is the predominant recrystallization mechanism at temperature higher than 1050 °C and strain rate lower than 0.01 s−1. Meanwhile, continuous dynamic recrystallization is the main mechanism observed at temperature below 1050 °C and strain rate above 0.01 s−1, mixed with a few DDRX grains. In addition, decreasing strain rate and increasing deformation temperature are found to facilitate the progress of DRX and refinement of grains in the Ti alloy in β forging process.
Key words: dynamic recrystallization; Ti−6Al−2Zr−1Mo−1V alloy; b forging process; compression test