The role of C and Mn at the austenite/pearlite reaction front during non-steady-state pearlite growth in a Fe–C–Mn steel

The role of C and Mn at the austenite/pearlite reaction front during non-steady-state pearlite growth in a Fe–C–Mn steel

The role of C and Mn during the growth of pearlite under non-steady state conditions is analyzed by comparing phase compositions of austenite, ferrite and cementite (γ+α+θ) through the use of transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), and atom probe tomograph...

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Veröffentlicht in:Scripta materialia 2015-07, Vol.104, p.67-70
Hauptverfasser: Aranda, M.M., Rementeria, R., Poplawsky, J., Urones-Garrote, E., Capdevila, C.
Format: Artikel
Sprache:eng
Schlagworte:
Atom probe analysis
Austenite
Cementite
Divergent pearlite
Growth rate
Interface diffusion
Manganese
MATERIALS SCIENCE
Pearlite
Pearlitic steel
Tomography
Transformations
Transmission electron microscopy
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Beschreibung
Zusammenfassung:The role of C and Mn during the growth of pearlite under non-steady state conditions is analyzed by comparing phase compositions of austenite, ferrite and cementite (γ+α+θ) through the use of transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), and atom probe tomography (APT) measurements across the austenite/pearlite interface. A local Mn enrichment and C depletion at the austenite/pearlite interface has been measured, which causes a change in the transformation driving force with time during divergent pearlite growth.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2015.04.005