The study on kinetics of metadynamic recrystallisation of a Nb-V microalloyed non-quenched and tempered steel. (22nd May 2020)

• Record Type: Journal Article
• Authors: Zhang, Liwen; Shen, Wenfei; Zhang, Chi; Xia, Yingnan; Shi, Xinhua; Xia, Fei
• Is Part Of: International journal of computational materials science and surface engineering. Volume 9:Number 1(2020)
• Page Start: 22
• Page End: 37
• Publication Date: 2020-05-22
• Subjects: metadynamic recrystallisation -- MDRX -- Nb-V microalloyed steel -- non-quenched and tempered steel -- hot compression; Surfaces (Technology) -- Periodicals; Materials -- Computer simulation -- Periodicals; Materials -- Mathematical models -- Periodicals; 620.110151
• Languages: English
• ISSNs: 1753-3465

Abstract

The metadynamic recrystallisation (MDRX) behaviour of a Nb-V microalloyed non-quenched and tempered steel was investigated by isothermal hot compression tests on Gleeble-1500 thermal-mechanical simulator. Compression tests were performed using double hit schedules at temperatures of 1, 273-1, 423 K, strain rates of 0.01-5 s −1, initial grain sizes of 92-149 μm and inter-pass time of 0.5-10 s. The effects of deformation parameters, including deformation temperature, strain rate, initial grain size and inter-pass time, on MDRX softening fraction were analysed. The experimental results show that MDRX softening fraction increases with the increase of deformation temperature, strain rate and inter-pass time, while it decreases with the increase of initial grain size. Based on the experimental results, the kinetic model of MDRX for the tested steel was established. A good agreement between the experimental and predicted MDRX softening fraction indicates that the established kinetic model can precisely predict the MDRX softening fraction for the tested steel.