A novel ultrafine-grained Fe 22Mn 0.6C TWIP steel with superior strength and ductility
作者： Y.Z. Tian , Y. Bai , L.J. Zhao , S. Gao , H.K. Yang
DOI: 10.1016/J.MATCHAR.2016.12.026
关键词:
摘要: Abstract A fully recrystallized ultrafine-grained (UFG) Fe 22wt.%Mn 0.6wt.%C twinning-induced plasticity (TWIP) steel with mean grain size of 576 nm was fabricated by cold rolling and annealing process. Tensile test showed that this UFG possessed high yield strength 785 MPa, unprecedented uniform elongation 48%. The Hall-Petch relationship verified from the coarse-grained (CG) regime to regime. microstructures at specified tensile strains were characterized electron backscattered diffraction (EBSD) transmission microscopy (TEM). strain hardening behavior TWIP compared CG counterpart. strong capability is supposed be responsible for good ductility.
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