In situ optical microscopic observation of NiCoMnIn metamagnetic shape memory alloy under pulsed high magnetic field

Xiao Xu, Wataru Ito, Ineko Katakura, Masashi Tokunaga, Ryosuke Kainuma

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

In situ microscopic imaging observation was performed on Ni 45Co5Mn36.7In13.3 metamagnetic shape memory alloy. Magnetic field-induced reverse martensitic transformation and heating-induced martensitic transformation were directly observed for the first time. The fraction of martensite phase was evaluated by contrast change from micrographs and critical magnetic fields were determined. Isothermal growth of martensite after magnetic field application was also observed. Comparison between the micrographs after the application of a magnetic field and on cooling also revealed the nature of the adiabatic process under a strong driving force.

Original languageEnglish
Pages (from-to)946-949
Number of pages4
JournalScripta Materialia
Volume65
Issue number11
DOIs
Publication statusPublished - 2011 Dec

Keywords

  • In situ observation
  • Magnetic field-induced transformation
  • Martensitic phase transformation
  • Metamagnetic shape memory alloy
  • NiCoMnIn

ASJC Scopus subject areas

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

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