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, vol.578, pp.297-302, 2013 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 578
  • Publication Date: 2013
  • Doi Number: 10.1016/j.jallcom.2013.06.030
  • Title of Journal : JOURNAL OF ALLOYS AND COMPOUNDS
  • Page Numbers: pp.297-302

Abstract

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.