Observations and analysis of the peritectic reaction for Fe-Co Alloys

Neill McDonald, Seetharaman Sridhar

Research output: Contribution to journalArticlepeer-review


The thermodynamics and kinetics associated with the peri-tectic transition have become greatly discussed topics. A high-temperature confocal scanning laser microscope has been used to observe the growth of γ-austenite along the pro-peritectic δ-ferrite/liquid-Fe boundary and to measure the rate at which this occurs. It was found, for Fe-18 wt.% Co, Fe-19 wt.% Co, and Fe-20 wt.% Co alloys, that the reaction rate increased with increasing undercooling over the temperature range observed and that there was no discernible difference in rate between the three alloys. The growth rate dependence on undercooling was found to be ν = (62.82 ΔT2-70.90 ΔT + 149.04) ± 15.61 μm s-1. This rate compared well with the growth model proposed by Bosze and Trivedi when the uncertainties in available phase diagram information were considered.

Original languageEnglish (US)
Pages (from-to)304-310
Number of pages7
JournalInternational Journal of Materials Research
Issue number3
StatePublished - Jan 1 2005
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry


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