Morphology of cementite decomposition in an fe-cr-c alloy

Zi-kui Liu, John ågren

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Dissolution of spheroidal cementite in austenite at 910 °C has been studied by means of scanning and transmission electron microscopy. Three different morphologies of transformation have been observed. Most of the particles undergo a more or less homogeneous shrinkage. However, some of the particles transform to austenite by a Widmanstätten type of reaction, whereby austenitic plates form inside the cementite. It is also observed that some of the cementite transforms to M7C3 carbide and austenite by a eutectoid reaction. The results can be understood by considering the phase diagram and assuming that local equilibrium prevails at the phase interface during the reaction.

Original languageEnglish (US)
Pages (from-to)1753-1759
Number of pages7
JournalMetallurgical Transactions A
Volume22
Issue number8
DOIs
StatePublished - Aug 1 1991

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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