Shape memory characteristics of thermoelastic TiNi system rapid-solidified fibers

Takeshi Yamahira, Yoshiaki Shinya, Shizuka Tamoto, Mitsuru Aiba, Sumio Kise, Yasubumi Furuya

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Ti50Ni50-x Cux(x = 0, 5, 10, 15 at%) fine fibers (diameter = φ80 μm, length = 20 cm∼1 m) were successfully developed by the arc-melted rapid-solidification method. It has been very difficult to do the conventional melt-work processing from the bulk material of this alloy to very fine fiber because of the brittleness of the especially in the range of Cu ≧ 8 at%. The fibers showed good shape memory effect. As Cu content increased, the temperature hysteresis(=Af-Mf) of recovery strain-temperature curves as well as that in the DSC curves became smaller. The tensile strength showed more than 1000 MPa in Ti50Ni40Cu10 at%. Therefore, the developed rapid-solidified, thermoelastic fine fiber actuator/sensor materials have high potential for applications for micro-machines and the fillers of smart composites.

Original languageEnglish
Pages (from-to)909-912
Number of pages4
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Issue number9
Publication statusPublished - 2002 Sept
Externally publishedYes


  • Fiber
  • Metallic actuator/sensor
  • Rapid-solidification
  • Shape memory alloy
  • Thermoelastic phase transformation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry


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