Analysis of the extent of interphase precipitation in V-HSLA steels through in-situ characterization of the γ/α transformation

Samuel Clark, Vit Janik, Arjan Rijkenberg, Seetharaman Sridhar

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

In-situ characterization techniques have been applied to elucidate the influence of γ/α transformation upon the extent of interphase precipitation in a low-carbon, vanadium-HSLA steel. Electron Back-scattered diffraction analyses of the γ/α orientation relationship with continuous cooling at 2 and 10 K/s suggest that the proportion of ferrite likely to hold interphase precipitation varies little with cooling rate. However, TEM analyses show that the interphase precipitation refines with increasing cooling rate in this cooling range. With cooling rates in excess of 20 K/s, interphase precipitation is increasingly suppressed due to the increasingly diffusional-displacive nature of the Widmanstätten γ/α transformation that is activated. The present study illustrates that the extent and dimensions of interphase precipitation can be controlled through controlled cooling.

Original languageEnglish (US)
Pages (from-to)83-89
Number of pages7
JournalMaterials Characterization
Volume115
DOIs
StatePublished - May 1 2016
Externally publishedYes

Keywords

  • In-situ-EBSD
  • In-situ-HT-CLSM
  • Interphase Precipitation
  • Orientation Relationships

ASJC Scopus subject areas

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

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