Superior strength-ductility synergy by hetero-structuring high manganese steel

Materials Research Letters

Daqiang Jiang¹  Lei Ge¹  Changfeng Chen¹  Xing Fang¹  Kaiyuan Yu¹  Runguang Li²  Xiaolei Wu³  Qiqi Xue³  Yang Ren⁴ 

[1] Department of Materials Science and Engineering, China University of Petroleum-Beijing;State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing;State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences;X-ray Science Division, Advanced Photon Source, Argonne National Laboratory;

关键词: hetero-structuring;    heterogeneous deformation-induced strain hardening;    ductility;    ultra-high strength steel;    high manganese steel;   

DOI  :  10.1080/21663831.2020.1780330

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown