Journal of Materials Research and Technology (Sep 2019)

Tailoring thermomechanical treatment of Ni-Fe-Ga melt-spun ribbons for elastocaloric applications

  • E. Villa,
  • C.O. Aguilar-Ortiz,
  • A. Nespoli,
  • P. Álvarez-Alonso,
  • J.P. Camarillo-Garcia,
  • D. Salazar,
  • F. Passaretti,
  • H. Flores-Zúñiga,
  • H. Hosoda,
  • V.A. Chernenko

Journal volume & issue
Vol. 8, no. 5
pp. 4540 – 4546

Abstract

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In the present work, the structural, mechanical and shape memory properties of Ni55Fe16Ga29 (at.%) melt-spun ribbons have been studied with a prospective of application in the elastocaloric devises. Particularly, a special thermo-mechanical treatment, consisting in the thermal aging under constant external stress, was elaborated to control the residual internal stress generated due to the melt-spinning processing and improve thermomechanical and superelastic responses of the ribbon. The stress-induced entropy change was evaluated for the ribbon with improved thermomechanical properties. Keywords: Melt spun ribbons, NiFeGa, Mechanical properties, Elastocaloric effect