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7014222 
Journal Article 
Superior strength-ductility synergy by hetero-structuring high manganese steel 
Fang, X; Xue, Q; Yu, K; Li, R; Jiang, D; Ge, Lei; Ren, Y; Chen, C; Wu, X; , 
2020 
TAYLOR & FRANCIS INC 
PHILADELPHIA 
8 
11 
417-423 
WOS:000549792200001 
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. 
Hetero-structuring; heterogeneous deformation-induced strain hardening; ductility; ultra-high strength steel; high manganese steel