High strength-ductility nano-structured high manganese steel produced by cryogenic asymmetry-rolling. Issue 4 (April 2018)

• Record Type: Journal Article
• Authors: Fu, Bin; Fu, Liming; Liu, Shichang; Wang, Huan Rong; Wang, Wei; Shan, Aidang
• Is Part Of: Journal of materials science & technology. Volume 34:Issue 4(2018)
• Page Start: 695
• Page End: 699
• Publication Date: 2018-04
• Subjects: Nano-structured TWIP steel -- Cryogenic deformation -- Asymmetric rolling (ASR) -- Nano-scale twins -- Work hardening ability; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2017.09.017
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: A bulk nanostructured twinning-induced plasticity (TWIP) steel with high ductility and high strength was fabricated by cryogenic asymmetry-rolling (cryo-ASR) and subsequent recovery treatment. It was found that the cryo-ASRed TWIP steels exhibit simultaneous improvements in the ductility, strength and work hardening. Typical microstructures of the cryo-ASR TWIP steel were characterized by shear bands and intensive mechanical nano-sized twins induced by cryogenic deformation. These mechanical nano-scale twins remain thermally stable during the subsequent recovery treatment. It is believed that the ductility enhancement and high work-hardening ability for the cryo-ASR TWIP steels should be mainly attributed to the high-density pre-existing nano-scale twins.