Martensitic transformation and magnetic transition of Ni52Ga28Fe20-xCox alloy

Fenghua Luo, Jiayan Chen, Katsunari Oikawa, Kiyohito Ishida

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The effects of Co content x on the martensitic and magnetic transition of Ni52Ga28Fe20-xCox alloys were investigated by optical micrography, SEM, DSC and VSM methods. The structure type of martensitic phase was determined by powder X-ray diffraction (XRD). Martensitic tranformation temperatures of Ni52Ga28Fe20-xCox alloys could be elevated quickly by the substitute of Co for Fe element in the Co content range of x≤6, whereas their curie points are unchanged. x value increased by 1 can increase the martensitic transformation temperature by 50-60 K. Annealing at 773 K for 1 h doesn't change the martensitic transformation temperatures-of studied alloys but increases their Curie points by 20-30 K. XRD patterns showed that only L10 (2 M) type of martensitic phases appeared in powder samples both annealed at 1423 K and at 773 K.

Original languageEnglish
Pages (from-to)93-98
Number of pages6
JournalJinshu Xuebao/Acta Metallurgica Sinica
Volume42
Issue number1
Publication statusPublished - 2006 Jan 1

Keywords

  • Ferromagnetic shape memory alloy
  • L1 martensitic phase
  • Ni-Ga-Fe-Co alloy

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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