Growth behavior of martensite plates in Fe-Ni-C alloys formed under high magnetic field and tensile stress at 4.2 K

Hideyuki Ohtsuka*, Gautam Ghosh, Kotobu Nagai, Hitoshi Wada

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The dimensions of fully grown martensite plates in Fe-27Ni-0.8C (mass%) and Fe-31Ni-0.4C alloys formed at 4.2 K under applied magnetic field (10 T) and tensile stress (220 MPa) are reported. The plates formed in cluster are classified into two categories during stereological measurements: the plates whose radial growth is limited by the austenitic grain boundaries only (Type I), and the plates whose radial growth is limited by the pre-existing martensitic plates only (Type II). It is demonstrated that the formation sequence of the plates has a strong effect on the radial growth and aspect ratio. The measured aspect ratio of type I plates in the Fe-27Ni-0.8C alloy agree very well with an earlier prediction based on the aspect ratio measurements in the temperature range of 193 to 77 K in an Fe-23.2Ni-2.9Mn alloy. Both these alloys are non-invar. However, in the case of Fe-31Ni-0.4C alloy, which is expected to be invar, the measured aspect ratio is less than the predicted value at 4.2 K.

Original languageEnglish (US)
Pages (from-to)1337-1340
Number of pages4
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume61
Issue number12
DOIs
StatePublished - 1997

Keywords

  • Aspect ratio
  • Growth behavior
  • High magnetic field
  • Iron-nickel-carbon alloy
  • Martensite plate
  • Martensitic transformation at 4.2 K

ASJC Scopus subject areas

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

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