Effect of heat treatment under stress on torque sensing using magnetostrictive (Fe-Ga-Al)-Zr-C alloy ring

Syusuke Hori, Teiko Okazaki, Yasubumi Furuya, Munekatsu Simada, Masanori Yokoyama, Motoichi Nakamura

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A single-structured torque sensor using a magnetostrictive ring attached to the steering shaft of the steering-by-wire system of an automobile was developed. An (Fe 0.80Ga 0.15Al 0.05) 99Zr 0.5C 0.5 alloy, which exhibited the large magnetostriction of 134 ppm and the strong tensile stress of over 800 MPa, was used for the magnetostrictive torque ring. However, the sensitivity of the torque ring sensor was 0.12 × 10 -4TN -1m -1, which is smaller than the 0.8 × 10 -4TN -1m -1 needed for a steering-by-wire system. The ring was therefore heattreated at 743K under a compressed stress of 100MPa via the spark plasma sintering method to increase the sensitivity of torque. As a result, the sensitivity of the torque ring sensor increased to 0.72 × 10 -4TN -1m -1 although depending on the residual magnetic flux density.

Original languageEnglish
Pages (from-to)963-967
Number of pages5
JournalMaterials Transactions
Volume53
Issue number5
DOIs
Publication statusPublished - 2012

Keywords

  • (Fe Ga Al ) Zr C alloy
  • Heat treatment
  • Magnetostrictive ring
  • Torque sensitivity
  • Torque sensor

ASJC Scopus subject areas

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

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