Effects of thermal treatments on transformation behaviour in shape memory Cu-Al-Ni alloys

Dagdelen F., Gokhan T., Aydogdu A., Aydogdu Y., Adiguzel O.

MATERIALS LETTERS, cilt.57, ss.1079-1085, 2003 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 57
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1016/s0167-577x(02)00934-5
  • Dergi Adı: MATERIALS LETTERS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1079-1085
  • Anahtar Kelimeler: transformation temperature, shape memory alloys, Cu-Al-Ni, entropy, enthalpy, THERMOELASTIC MARTENSITIC TRANSFORMATIONS, THERMODYNAMICS, PRECIPITATION, KINETICS
  • Gazi Üniversitesi Adresli: Hayır

Özet

The martensitic transformation behaviour, morphology and transition temperatures in copper-based shape memory alloys are strongly influenced by heat treatments. The effects of various quenching, up-quenching and step-quenching in a water bath 100 degreesC and in an oil bath at 200 degreesC have been studied on two shape memory Cu-Al-Ni alloys. The changes at entropy and enthalpy at the martensitic transition have been determined by means of differential scanning calorimeter (DSC) measurements. It was observed that quenching has a marked influence on the transformation temperatures. (C) 2002 Elsevier Science B.V. All rights reserved.