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Mechanism of the peritectic phase transition in Fe-C and Fe-Ni alloys under conditions close to chemical and thermal equilibrium

Journal Article


Abstract


  • In-situ studies of the peritectic phase transition were performed under conditions close to chemical and thermal equilibrium in order to investigate the governing mechanism of both the peritectic reaction and the subsequent peritectic transformation using high-temperature laser-scanning microscopy in combination with the concentric solidification technique. Experiments have been conducted in the Fe-C and Fe- Ni systems in order to determine the role of solute diffusion on the observed reaction and transformation kinetics. The peritectic reaction as such as well as the subsequent peritectic transformation can be explained by diffusion-controlled mechanisms. Observations of the triple point L/γ?/δ?revealed that the peritectic reaction can be described as the solidification of γ?along the L/γ?interface, and new insights have been gained on the localized re-melting of δ?during the peritectic reaction. KEY WORDS: peritectic; solidification; phase transformation; steel. © 2014 ISIJ.

Publication Date


  • 2014

Citation


  • Griesser, S., Bernhard, C., & Dippenaar, R. (2014). Mechanism of the peritectic phase transition in Fe-C and Fe-Ni alloys under conditions close to chemical and thermal equilibrium. ISIJ International, 54(2), 466-473. doi:10.2355/isijinternational.54.466

Scopus Eid


  • 2-s2.0-84897098565

Web Of Science Accession Number


Start Page


  • 466

End Page


  • 473

Volume


  • 54

Issue


  • 2

Abstract


  • In-situ studies of the peritectic phase transition were performed under conditions close to chemical and thermal equilibrium in order to investigate the governing mechanism of both the peritectic reaction and the subsequent peritectic transformation using high-temperature laser-scanning microscopy in combination with the concentric solidification technique. Experiments have been conducted in the Fe-C and Fe- Ni systems in order to determine the role of solute diffusion on the observed reaction and transformation kinetics. The peritectic reaction as such as well as the subsequent peritectic transformation can be explained by diffusion-controlled mechanisms. Observations of the triple point L/γ?/δ?revealed that the peritectic reaction can be described as the solidification of γ?along the L/γ?interface, and new insights have been gained on the localized re-melting of δ?during the peritectic reaction. KEY WORDS: peritectic; solidification; phase transformation; steel. © 2014 ISIJ.

Publication Date


  • 2014

Citation


  • Griesser, S., Bernhard, C., & Dippenaar, R. (2014). Mechanism of the peritectic phase transition in Fe-C and Fe-Ni alloys under conditions close to chemical and thermal equilibrium. ISIJ International, 54(2), 466-473. doi:10.2355/isijinternational.54.466

Scopus Eid


  • 2-s2.0-84897098565

Web Of Science Accession Number


Start Page


  • 466

End Page


  • 473

Volume


  • 54

Issue


  • 2