Abstract
The dynamic microstructure evolution and mechanism were investigated for Fe-38Mn alloy during hot shear-compression deformation under wide ranges of deformation temperature and strain rate. It was found that increasing the strain rate or the deformation temperature can promote the dynamic recrystallization of Fe-38Mn alloy. In comparison, increased strain rate is more beneficial to obtain fine grains. However, when the deformation temperature reached 1100 °C the obvious growth of dynamic recrystallized grains occurred under all strain rates. Benefited from the strain path of the shear-compression deformation and low stacking fault energy of Fe-38Mn alloy, numerous micro-shear bands were introduced into deformed microstructures. The dynamic recrystallization is discontinuous in appearance but continuous in nature, which is actually caused by the micro-shear bands. Furthermore, the mechanism of twinning induced nucleation was confirmed. Particularly, the deformation twinning played a key role on grain refinement and exhibited strong dependence on the strain rate.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
