Novel magnetostrictive bimetal actuator using permendur

Mojtaba Ghodsi*, Toshiba Ueno, Toshiro Higuchi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Citations (Scopus)


In this research permendur (49Fe-49Co-2V) and nickel were used to make a novel bimetal actuator. The actuator consists of a main body and core with energizing coil. The main body of actuator is made of annealed permendur with two magnetostrictive bimetal arms. The magnetostrictive bimetal technique is used to enhance the small displacement of permendur. Static and dynamic behaviors of the actuator are investigated at both, room temperature (RT) and 77 K. The actuator magnified the small displacement of permendur strip (1.8 μm) and large displacement of 9 and 5 μm are achieved at RT and 77 K, respectively when the coil was energized by ± 5 A current. Additionally, it is found that resonance frequency of actuator is 1240 Hz at 77 K and 1125 Hz at RT. Since the stiffness of actuator increases at 77 K, the displacement of actuator is reduced 33-50% when the coil is energized with different amplitudes at cryogenic environments.

Original languageEnglish
Title of host publicationAdvanced Materials Research
Number of pages4
Volume47-50 PART 1
Publication statusPublished - 2008
EventMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures - Hong Kong, P.R., China
Duration: Jul 28 2008Jul 31 2008

Publication series

NameAdvanced Materials Research
Volume47-50 PART 1
ISSN (Print)10226680


OtherMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
CityHong Kong, P.R.


  • Bimetal actuator
  • Cryogenic environments
  • Magnetostrictive
  • Static and dynamic responses

ASJC Scopus subject areas

  • Engineering(all)


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