Effects of deformation temperature and amount on the two-way shape memory effect of solutionized Ni50.8Ti49.2 alloys

Kaya I., Acar E., Karaca H. E.

INTERMETALLICS, cilt.114, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 114
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.intermet.2019.106607
  • Dergi Adı: INTERMETALLICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Shape-memory alloys, Two-way shape memory effect, Phase transformation, Mechanical testing, NiTi, R-phase, TI-NI, TRANSFORMATION
  • Erciyes Üniversitesi Adresli: Evet

Özet

Temperature dependent compressive response and two-way shape memory effect (TWSME) of Ni50.8Ti49.2 (at.%) shape memory alloys were systematically investigated. It was found that solutionized Ni50.8Ti49.2 alloys could show positive and negative TWSME if they are plastically deformed in martensite and austenite (above Md), respectively. The maximum positive TWSME strain was 1.4% after martensite deformation of 8% at -90 degrees C and maximum negative TWSME strain of 0.5% was obtained after austenite deformation of 8% at 200 degrees C.