Dynamic recrystallization mechanisms of an Fe–8% Al low density steel under hot rolling conditions

Abstract

Iron-aluminium alloys display promising physical and mechanical properties. In this study, the effects of strain, strain rate and temperature on an Fe-8% Al were investigated. Hot torsion tests were performed in the temperature range 900-1100 °C and strain rate range 0.1-10 s À1 . In this alloy, two types of dynamic recrystallization may operate during hot deformation: at high temperature and high strain rate, this alloy undergoes discontinuous dynamic recrystallization, whereas at lower temperature and strain rate, continuous dynamic recrystallization occurs.

Microstructure and mechanical properties of hot-rolled Zr–3Al–χBe alloys

“…Previous studies have shown that the recrystallization occur while the alloys are hot-rolled at high temperature, which result in subgrains [23][24][25]. Castan et al also pointed out that the recrystallization readily occurred after the original grain boundaries were elongated and broken up during hot rolling process [10]. The results of the studied alloys were similar to the study by Castan [10].…”

“…Moreover, heat processing technology can optimize the microstructure and mechanical properties by controlling the phase composition and precipitation of compounds [9]. Castan [10] studied the microstructure evolution of Fe-8% Al low density steel under hot rolling conditions. The study showed that the recrystallized grain occurred at the suitable hot rolling temperature.…”

Hot deformation characterization of duplex low-density steel through 3D processing map development

“…To this end, it is important to investigate the deformation behavior of the steels at elevated temperature since the thermomechanical processing is a devoted part of steel production. In contrast to the amount of researches dedicated to the physical metallurgy of low-density steels, the conducted studies on their hot deformation behavior are quite rare [19,20]. Castan et al [19] have shown that the dynamic recrystallization (DRX) operates as the dominant restoration mechanism during hot deformation of Fe-9%Al alloy.…”

“…In contrast to the amount of researches dedicated to the physical metallurgy of low-density steels, the conducted studies on their hot deformation behavior are quite rare [19,20]. Castan et al [19] have shown that the dynamic recrystallization (DRX) operates as the dominant restoration mechanism during hot deformation of Fe-9%Al alloy. However, According to Hamada et al [20] the addition of Al to conventional high-Mn TWIP steels retards the onset of DRX to the higher imposed strains.…”

Microstructural characterizations of 14Cr ODS ferritic steels subjected to hot torsion

“…The texture is weak as well. The typical D2 component f 1 1 2gh1 1 1i expected in torsion tests of ferritic steels [18,22,23] is not observed (Fig. 8).…”