Tailoring the strength and ductility of T91 steel by partial tempering treatment

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

63 Scopus Citations
View graph of relations

Author(s)

  • Z. Shang
  • Jie Ding
  • M. Song
  • Jin Li
  • Q. Li
  • S. Xue
  • K. T. Hartwig
  • X. Zhang

Detail(s)

Original languageEnglish
Pages (from-to)209-224
Journal / PublicationActa Materialia
Volume169
Publication statusPublished - 1 May 2019
Externally publishedYes

Abstract

T91 ferritic/martensitic steel (modified 9Cr-1Mo steel) with high strength and high ductility is considered one of the promising structural materials for various industrial applications. Recent studies show that equal channel angular pressing can improve the yield strength of T91 steel to 1.6 GPa but degrade the uniform elongation to ∼1%. Here, we report that by using a modified quenching and tempering treatment, T91 steel can achieve a high yield strength of 1.4 GPa and a uniform elongation of ∼5.5%. Extensive microstructure analyses show the formation of transition carbides and ultra-fine martensite within bainite grains. This study provides an alternative approach to obtain a combined enhancement of strength and ductility for T91 steel.

Research Area(s)

  • Carbides, Ductility, Partial tempering treatment, Strength, T91 ferritic/martensitic steel

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Tailoring the strength and ductility of T91 steel by partial tempering treatment. / Shang, Z.; Ding, Jie; Fan, C. et al.
In: Acta Materialia, Vol. 169, 01.05.2019, p. 209-224.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review