Advanced high strength steel (AHSS) development through chemical patterning of austenite

SCRIPTA MATERIALIA

卷:146

Article

Sun, W. W.¹  Wu, Y. X.¹  Yang, S. C.¹  Hutchinson, C. R.¹ 

[1] Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia

关键词: Advanced high strength steels (AHSS);    Pearlite;    Retained austenite;    TRIP;   

DOI  :  10.1016/j.scriptamat.2017.11.007

来源: Elsevier

【 摘 要 】

A new approach for the development of medium Mn AHSS is proposed in this work. It exploits a fine scale (similar to 100 nm) chemical patterning of Mn in austenite that may be obtained by the austenitisation of a pearlite structure formed under conditions with strong Mn partitioning between ferrite and cementite. The resulting 'ghost pearlite' ferrite/austenite can be subsequently treated to exhibit an interesting combination of ultimate tensile strength (UTS) (1600-2100 MPa) and ductility (7-10% elongation). The simple steel composition and very short processing provides a UTS-ductility combination similar to maraging steels and super bainitic steels. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free