Characterization of the shape memory properties of a Ni45.3Ti39.7Hf10Pd5 alloy

Acar E., Karaca H. E., Tobe H., Noebe R. D., Chumlyakov Y. I.

JOURNAL OF ALLOYS AND COMPOUNDS, cilt.578, ss.297-302, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 578
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.jallcom.2013.06.030
  • Dergi Adı: JOURNAL OF ALLOYS AND COMPOUNDS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.297-302
  • Anahtar Kelimeler: NiTiHfPd alloys, Microstructure, TWSME, High work output, High strength SMAs, Shape memory alloys, NITIHFPD SINGLE-CRYSTALS, INDUCED MARTENSITIC-TRANSFORMATION, COMPRESSIVE RESPONSE, ELECTRON-MICROSCOPY, BEHAVIOR, STRENGTH, SUBSTRUCTURE
  • Erciyes Üniversitesi Adresli: Hayır

Özet

The load-biased shape memory and superelastic responses of a Ni45.3Ti39.7Hf10Pd5 polycrystalline alloy were investigated in compression. Transformation strain of up to 4.6% and work output of up to 29 J cm(-3) were determined from load-biased thermal cycling experiments. The alloy showed good superelastic behavior at 90 degrees C with recoverable strain of over 4%. It was also determined that the Ni45.3Ti39.7Hf10Pd5 alloy could develop two-way shape memory strain of 1.6% without an intense training process. Transmission electron microscopy (TEM) revealed that the internal twins formed in the martensite variants were < 0 1 1 > type II twins. (c) 2013 Elsevier B.V. All rights reserved.