Superior strength-ductility synergy by hetero-structuring high manganese steel. Issue 11 (1st November 2020)

• Record Type: Journal Article
• Authors: Fang, Xing; Xue, Qiqi; Yu, Kaiyuan; Li, Runguang; Jiang, Daqiang; Ge, Lei; Ren, Yang; Chen, Changfeng; Wu, Xiaolei
• Is Part Of: Materials research letters. Volume 8:Issue 11(2020)
• Page Start: 417
• Page End: 423
• Publication Date: 2020-11-01
• Subjects: Hetero-structuring -- heterogeneous deformation-induced strain hardening -- ductility -- ultra-high strength steel -- high manganese steel; Materials science -- Research -- Periodicals; Biomedical materials -- Research -- Periodicals; Composite materials -- Research -- Periodicals; Biomedical materials -- Research; Composite materials -- Research; Materials science -- Research; Periodicals; 620.1105
• DOI: 10.1080/21663831.2020.1780330
• Languages: English
• ISSNs: 2166-3831

Abstract

Abstract : Lacking of forest hardening makes low ductility in steels long challenge particularly at high yield strength. Here, we report to make good use of hetero-structuring for superior strength-ductility synergy in high manganese steel. The point is to retain original deformed structure of large quantity, along with recrystallized ultrafine-grains and fine grains, jointly for most effective heterogeneous deformation-induced (HDI) hardening especially at high strength. The residual plastic strain of larger than 0.2% and large proportion of HDI stress over 60% indicate the crucial role in ductility by HDI hardening. This renders a significantly upgraded strength-ductility combination within high strength scope. Impact statement: By using the hetero-structuring strategy, a superior strength-ductility synergy is realized specifically at ultra-high strength in high manganese steel. GRAPHICAL ABSTRACT: UF0001