Evolution of microstructure and mechanical properties during annealing of cold rolled Fe-24Mn-3Al-2Si-1Ni-0.06C TWIP steel

Authors

Ahmed A. Saleh, University of WollongongFollow
Azdiar A. Gazder, University of WollongongFollow
Dagoberto B. Santos, Federal University of Minas Gerais Brazil
E V. Pereloma, University of WollongongFollow

RIS ID

46758

Publication Details

Saleh, A. A., Gazder, A. A., Santos, D. B. Pereloma, E. V. (2012). Evolution of microstructure and mechanical properties during annealing of cold rolled Fe-24Mn-3Al-2Si-1Ni-0.06C TWIP steel. In 7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011, 1-5 August 2011, Quebec City, QC. Advanced Materials Research, 409 719-724.

Abstract

TWinning Induced Plasticity (TWIP) steels have been recently developed as a promising material for automotive applications. In the present work the recrystallisation behaviour of 42% cold-rolled Fe-24Mn-3Al-2Si-1Ni-0.06C TWIP steel was investigated during isochronal annealing for 300s via microhardness testing, Electron Back-Scattering Diffraction (EBSD) and uniaxial tensile testing. EBSD internal misorientation data corroborates recrystallised fraction estimates from microhardness measurements. Annealing twins play an important role during recrystallisation by bulging at the deformed grain boundaries during nucleation and generating twin related orientations. During uniaxial tension, the recovered condition recorded three work hardening regions while all partially recrystallised samples exhibited four regions. A modified Hollomon scheme is suggested to account for the effect of strain on microstructure refinement.