Thermo-mechanical Characterization of an Aged Ni45.3Ti39.7Hf10Pd5 Shape Memory Alloy


Acar E. , Toker G., Saedi S., Tobe H., Karaca H.

JOM, vol.73, no.2, pp.640-645, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 73 Issue: 2
  • Publication Date: 2021
  • Doi Number: 10.1007/s11837-020-04449-1
  • Title of Journal : JOM
  • Page Numbers: pp.640-645

Abstract

© 2020, The Minerals, Metals & Materials Society.Thermo-mechanical characterization of a Ni45.3Ti39.7Hf10Pd5 polycrystalline shape memory alloy after aging at 550°C for 3 h was conducted. Thermal cycling under constant stress,superelasticity and loading till failure tests were employed to reveal the shape memory and material properties. Recoverable shape memory strain of 3.8% was achieved under compressive stress of 500 MPa. The sample showed almost perfect superelasticity above 70°C with total recoverable strain of about 4%, but failed at 2340 MPa with compressive strain > 13% at 35°C, and aging was not found to significantly affect its shape memory behavior because of the low volume fraction of precipitates.