| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8004416 | Journal of Iron and Steel Research, International | 2016 | 7 Pages |
Abstract
A hot compression experiment (1073-1473 K, strain rates of 0.001-10sâ1) of SA508GR. 4N low alloy steel was performed using a Gleeble-3800 thermal-mechanical simulator, and the hot deformation behavior of the steel was investigated by analyzing both the true stress-true strain curves and its microstructures. The thermal deformation equation and hot deformation activation energy (Q) of SA508GR. 4N steel were obtained by regression with a classic hyperbolic sine function. The hot processing map of SA508GR. 4N steel was also established. An empirical equation for the stress peak was described for practical applications. The SA508GR. 4N steel showed a critical Zener-Hollomon parameter (lnZc) for dynamic recrystallization (DRX) of 37.44, below which full DRX may occur. The sensitivity of the SA508GR.4N steel increased linearly with test temperature, such that higher temperatures led to enhanced workability.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Ning LIU, Zheng-dong LIU, Xi-kou HE, Zhi-qiang YANG, Long-teng MA,