%0 Journal Article
%A Shi, Yindong
%A Zhang, Haojie
%A Wang, Lina
%A liu, tao
%A Zhang, Xiliang
%A Yang, Xinrui
%A Xing, Zhenguo
%A Zhu, Yuntian
%T Global 3D-gradient-structured steel sheets with superior strength-ductility combination
%J Materials science & engineering / A
%V 935
%@ 0921-5093
%C Amsterdam
%I Elsevier
%M PUBDB-2025-03628
%P 148383
%D 2025
%Z Waiting for fulltext 
%X Global gradient structures (GGS) from core to surface processed by twisting have been reported to possess exceptional strength-ductility combinations. However, it is hard to apply this technique to sheet (plate) samples because of their lower axial symmetry. Here, we report a novel 3D-GGS produced in a 304 stainless steel (304ss) sheet using cyclic twisting. The 3D-GGS 304ss sheets exhibited much better strength-ductility combinations than GGS 304ss rods due to their more pronounced heterostructural effects. During the tensile testing, a unique transformation-induced plasticity (TRIP) effect was activated in which reverse martensitic transformation (α′ → γ) was first activated, then transited to forward martensitic transformation (γ → α′) after some strain. Both the reverse and forward TRIP effects contributed to higher ductility. In addition, the 3D-structures also produced hetero-deformation induced (HDI) work hardening to retain ductility. This work developed a practical approach to constructing 3D-GGS to enhance integrated performances of metal sheets and components without changing their geometries.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1016/j.msea.2025.148383
%U https://bib-pubdb1.desy.de/record/636203