Strengthening mechanism of hot rolled Ti and Nb microalloyed HSLA steels containing Mo and W with various coiling temperature

Dae Bum Park, Moo Young Huh, Jae Hyeok Shim, Jin Yoo Suh, Kyu Ho Lee, Woo Sang Jung

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60 Citations (Scopus)

Abstract

The effect of Mo- and W-addition on the precipitation hardening of Ti- and Nb-microalloyed high-strength low-alloy steels was investigated. The variation in simulated hot-coiling temperature caused a significant difference in strength, which is attributed mainly to different precipitation-hardening behavior. Among the four alloys with different combination of the microalloying elements: Ti-Mo, Nb-Mo, Ti-W, and Nb-W, the steel with Nb-Mo turned out to be the most effective in precipitation hardening. The strengthening mechanism was discussed based on the microstructural evolution observed by electron microscopy and the theoretical considerations combining the different hardening models.

Original languageEnglish
Pages (from-to)528-534
Number of pages7
JournalMaterials Science and Engineering A
Volume560
DOIs
Publication statusPublished - 2013 Jan 10

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Keywords

  • Coiling temperature
  • Complex carbide
  • HSLA steel
  • Strengthening mechanism

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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