Shape memory characteristics of Ti-22Nb-(2-8)Zr(at.%) biomedical alloys

  • Kim J
  • Kim H
  • Inamura T
 et al. 
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Abstract

Shape memory characteristics of Ti-22Nb-(2-8)Zr(at.%) biomedical alloys were investigated by using tensile tests and X-ray diffraction (XRD) measurement. The alloy ingots were fabricated by an arc melting method. The ingots were cold-rolled by a reduction up to 95% in thickness at room temperature. All the alloys were solution-treated at 1173 K for 1.8 ks. The alloys subjected to the solution treatment exhibited large elongations ranging between 28 and 40%. The martensitic transformation temperature decreased by 38 K with 1 at.% increase of Zr content. The maximum recovered strain of 4.3% was obtained in the Ti-22Nb-4Zr(at.%) alloy. Ti-22Nb-(2-4)Zr(at.%) and Ti-22Nb-6Zr(at.%) alloys exhibited stable shape memory effect and superelastic behavior at room temperature, respectively. © 2005 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Biomaterials
  • Shape memory effect
  • Smart material
  • Superelasticity
  • Ti-Based alloy
  • Ti-Nb-Zr

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