An ultra-high-strength 12Mn maraging steel realized via nanoscale heterostructure engineering

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Mujin Yang
  • Chao Huang
  • Zhifu Yao
  • Zhijie Yang
  • Zhou Li
  • Cuiping Wang
  • Haichen Wu
  • Yilu Zhao
  • Shuai Wang
  • Xingjun Liu

Detail(s)

Original languageEnglish
Article number134770
Journal / PublicationMaterials Letters
Volume349
Online published19 Jun 2023
Publication statusPublished - 15 Oct 2023

Abstract

A 12Mn maraging steel Fe-12Mn-5Co-1Ti-1Mo-1Si, strengthened by the Heusler Fe2TiSi phase, was designed with nanoscale heterostructures. When aged at 450 °C, fine Fe2TiSi particles uniformly precipitate within the martensite lath, contributing as the main strengthening phase. At the same time, a nanoscale austenite layer was observed to grow at the lath interface, significantly toughening the martensite lath matrix. With this hierarchical nano-structure, the super-high tensile strength of ∼1700 MPa with good elongation of ∼7 % at break was achieved. Our case uncovers that hierarchical nanoscale heterogeneous microstructure could pave a new path to achieve synergistic improvement of strength and ductility. © 2023 Elsevier B.V.

Research Area(s)

  • Fe2TiSi phase, Maraging steels, Microstructure, Nano-austenite layer, Particle, nanosize

Citation Format(s)

An ultra-high-strength 12Mn maraging steel realized via nanoscale heterostructure engineering. / Yang, Mujin; Huang, Chao; Yao, Zhifu et al.
In: Materials Letters, Vol. 349, 134770, 15.10.2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review