High-strength steels hardened mainly by nanoscale NiAl precipitates

Zengbao Jiao, J. H. Luan, Z. W. Zhang, M. K. Miller, C. T. Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

96 Citations (Scopus)

Abstract

NiAl-strengthened high-strength steels usually have high Ni and Al contents in order to form hardening particles. Here, several new low-Ni steels are reported, which achieve a combination of relatively low cost, high strength and good ductility mainly through the precipitation of high number densities of nanoscale NiAl precipitates as characterized by atom probe tomography. The precipitation parameters are tuned by optimizing both alloy compositions and heat-treatment parameters. The strengthening effects of nanoscale NiAl and Mo/W-rich carbides are quantitatively analyzed and assessed.
Original languageEnglish
Pages (from-to)45-48
Number of pages4
JournalScripta Materialia
Volume87
DOIs
Publication statusPublished - 15 Sept 2014
Externally publishedYes

Keywords

  • Atom probe tomography
  • Ferritic steel
  • Mechanical property
  • NiAl precipitate
  • Precipitation

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics

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