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

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

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16 Citations (Scopus)

Abstract

A new approach for the development of medium Mn AHSS is proposed in this work. It exploits a fine scale (~ 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.

Original languageEnglish
Pages (from-to)60-63
Number of pages4
JournalScripta Materialia
Volume146
DOIs
Publication statusPublished - 15 Mar 2018

Keywords

  • Advanced high strength steels (AHSS)
  • Pearlite
  • Retained austenite
  • TRIP

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