Open AccessResearch on static recrystallization behaviour of pure molybdenum rods during forging
Author(s) -
Qifei Zhang,
Aiqin Wang,
Yao Chen,
Jingpei Xie,
Douqin Ma,
Sihu Ha
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
ISSN - 2053-1591
DOI - 10.1088/2053-1591/abfac5
Subject(s) - materials science , molybdenum , rod , recrystallization (geology) , dynamic recrystallization , strain rate , softening , metallurgy , activation energy , hot working , microstructure , composite material , forging , deformation (meteorology) , grain size , chemistry , medicine , paleontology , alternative medicine , pathology , organic chemistry , biology
In this work, thermal compression experiment of pure molybdenum rods with sintered density of 9.7–9.8 g cm −3 were performed on the Gleeble-1500D thermal simulator. The double-pass vacuum high-temperature compression test was carried out in a deformation temperature of 1200 °C–1350 °C, a strain rate of 3 s −1 and an interval time of 10–500 s. The stress-strain curve was obtained and analysed. The static softening rate was calculated by the 2% compensation method of yield stress, and the curve of that was fitted. The results show that the softening rate is proportional to the interval time and the deformation temperature. The static recrystallization activation energy and critical temperature of pure molybdenum rod is 583.79 kJ mol −1 and 1365 °C, respectively. Besides, the static recrystallization kinetics model and grain growth model of pure molybdenum rod was established and microstructure evolution of molybdenum was analysed during the deformation process.