Kinetics and crystallography of intragranular pearlite transformation nucleated at (MnS+VC) complex precipitates in hypereutectoid Fe-Mn-C alloy

Z. Guo, N. Kimura, S. Tagashira, T. Furuhara, T. Maki

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Kinetics and crystallography of intragranular pearlite nucleated at the surface of (MnS+VC) complex precipitate were studied in hypereutectoid Fe-Mn-C steels. The incoherent MnS embedded in the austenite does not act as a strong nucleation site of pearlite unless the transformation time is prolonged. The intragranular pearlite transformation is promoted effectively by the addition of vanadium (V). EPMA analysis showed that the intragranular pearlite nucleates on the (MnS+VC) complex precipitate in the V-added alloy. As the transformation temperature decreases, the intragranular pearlite formation occurs more frequently. A single intragranular pearlite is composed of several colonies, indicating that multiple pearlite colonies nucleate on a (MnS+VC) complex precipitate for intragranular pearlite transformation. There is no specific orientation relationship (OR) between ferrite in intragranular pearlite and austenite matrix while there is a specific OR (Pitsch-Petch OR) between pearlitic ferrite and cementite in the intragranular pearlite.

Original languageEnglish
Pages (from-to)1033-1041
Number of pages9
JournalIsij International
Volume42
Issue number9
DOIs
Publication statusPublished - 2002

Keywords

  • Crystallography
  • Microstructure
  • Phase transformations
  • Steel

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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