Formation of FeNi with L10-ordered structure using high-pressure torsion

Seungwon Lee, Kaveh Edalati, Hideaki Iwaoka, Zenji Horita, Takumi Ohtsuki, Takuo Ohkochi, Masato Kotsugi, Takayuki Kojima, Masaki Mizuguchi, Koki Takanashi

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

FeNi with the L10-ordered structure is formed over an astronomical timescale in meteorites. In this study, severe plastic deformation using high-pressure torsion (HPT) is employed for the production of the L10 structure in the laboratory. Its formation is confirmed by X-ray diffraction analysis and transmission electron microscopy. Processing of elemental nanopowders by HPT is an effective method for the formation of the L10 phase, which is enhanced by the addition of Co to FeNi or annealing after HPT. The formation of the phase must be associated with enhanced diffusion through HPT.

Original languageEnglish
Pages (from-to)639-646
Number of pages8
JournalPhilosophical Magazine Letters
Volume94
Issue number10
DOIs
Publication statusPublished - 2014 Oct

Keywords

  • enhanced diffusion
  • phase transformation
  • severe plastic deformation (SPD)
  • transmission electron microscopy
  • ultrafine grains (UFG)

ASJC Scopus subject areas

  • Condensed Matter Physics

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