Magnetic field-induced reversible variant rearrangement in Fe-Pd single crystals

Tokujiro Yamamoto, Minoru Taya, Yuji Sutou, Yuanchang Liang, Taishi Wada, Larry Sorensen

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)

Abstract

Variant rearrangements induced by external magnetic field in Fe-Pd FCT martensite transformed from FCC austenite single crystals have been investigated by means of optical microscopy. Fe-Pd single crystals in fully martensite state contain two large correspondence variants, and a kink due to {1 0 1} twinning is observed at the twinning boundary of the variants. The twinning boundary exhibits both large reversible and small irreversible movement by applying magnetic field as a result of variant rearrangement, and 0.49% of reversible strain is obtained. The variant rearrangement is not completed even though magnetic flux density is increased to maximum of an electromagnet used. The boundary also moves reversibly by application of external compression stress, however, the direction of the boundary movement is opposite with respect to the movement induced by magnetic field and the variant rearrangment is not completed. The reversible strain of 2.8% was also observed when the specimen was compressed.

Original languageEnglish
Pages (from-to)5083-5091
Number of pages9
JournalActa Materialia
Volume52
Issue number17
DOIs
Publication statusPublished - 2004 Oct 4

Keywords

  • Fe-Pd
  • Ferromagnetic shape memory alloy
  • Martensitic transformation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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