Morphology control of sulfide in Fe-Cr-S alloys during the solidification

Katsunari Oikawa, Tamio Ikeshoji, Hajime Mitsui

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

The evolution of sulfide morphology in the Fe-(0.3 to 18) mass% Cr-0.3 mass% S alloys during solidification and its modification by additions of elements such as Mn, Ti, Zr and C have been investigated by means of optical microscopy, scanning electron microscopy and X-ray diffraction. The sulfide morphologies in the Fe-Cr-S ternary alloy are classified under three types: (i) cellwall (ii) fine particle and (iii) globular sulfides. The iron-rich cellwall sulfide is formed in the Fe-(0.3-1) %Cr-0.3 %S alloys. This sulfide morphology changes to the globular type with increasing Cr content and the size of that is more than 5 μm. Fine sulfide particles of size smaller than 2 μm also coexist in the Fe-(0.3-5) %Ct-0.3 %S alloys. Zr or Ti additions change this morphology from the globular type to the rod-like type in the Fe-18 %Cr-0.3 %S alloy, but Mn addition does not have the same effect. The mechanism of the formation of different sulfide morphologies is discussed on the basis of phase diagram information.

Original languageEnglish
Pages (from-to)369-374
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume580
Publication statusPublished - 2000 Dec 1
EventNucleation and Growth Processes in Materials - Boton, MA, USA
Duration: 1999 Nov 291999 Dec 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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