Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 573, Issue -, Pages 215-221Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2013.03.009
Keywords
Medium carbon vanadium microalloyed steel; Hot deformation; Constitutive equation; Dynamic recrystallization (DRX)
Categories
Funding
- National Natural Science Foundation of China (NSFC Project) [51071019]
- National High Technology Research and Development Program of China [2013AA031601]
Ask authors/readers for more resources
The dynamic recrystallization behavior of a medium carbon vanadium microalloyed steel was systematically investigated at the temperatures from 900 degrees C to 1100 degrees C and strain rates from 0.01 s(-1) to 10 s(-1) on a Gleeble-1500 thermo-simulation machine. The flow stress constitutive equation of hot deformation for this steel was developed with the activation energy Q being about 273 kJ/mol, which is in reasonable agreement with those reported before. Activation energy analysis showed that vanadium addition in microalloyed steels seemed not to affect the activation energy much. The effect of Zener-Hollomon parameter on the characteristic points of flow curves was studied using the power law relation, and the dependence of critical strain (stress) on peak strain (stress) obeyed a linear equation. Dynamic recrystallization is the most important softening mechanism for the experimental steel during hot compression. The dynamic recrystallization kinetics model of this steel was established based on flow stress and a frequently-used dynamic recrystallization kinetics equation. Dynamic recrystallization microstructure under different deformation conditions was also observed and the dependence of steady-state grain size on the Zener-Hollomon parameter was plotted. (c) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available