Shape Memory and Superelasticity

, Volume 5, Issue 1, pp 125–135 | Cite as

Effects of Sn Addition on NiTi Shape Memory Alloys

  • Avery W. YoungEmail author
  • Tyler Torgerson
  • Nathan A. Ley
  • Keirsten Gomez
  • Othmane Benafan
  • Marcus L. Young


NiTiSn shape memory alloys provide a cost-effective alternative to many NiTi-based low-temperature shape memory alloy systems such as NiTi: Cr, Co, and Nb. To demonstrate the viability of NiTiSn shape memory alloys for low-temperature actuator applications, the NiTiSn alloy system was investigated over the course of four alloy heats (Heats I–IV). The site preference of Sn in near-equiatomic NiTi was examined by substituting Sn for Ni in Heat I and Sn for Ti in Heat II up to 10 at.% Sn. The effects of solution annealing (Heat III) and Ni:Ti ratio adjustments (Heat IV) on the phase transformation behavior and microstructural morphology of NiTiSn shape memory alloys were also assessed.


Shape memory Low temperature NiTiSn 



The authors thank the Consortium for the Advancement of Shape Memory Alloy Research and Technology (CASMART). This research was a direct result of the CASMART Student Design Challenge at the International Conference on Shape Memory and Superelastic Technologies (SMST 2017) [34]. The authors acknowledge the permission for SEM access by the UNT’s Materials Research Facility (MRF), and thank D. Scheiman for DSC characterization.


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Copyright information

© ASM International 2018

Authors and Affiliations

  • Avery W. Young
    • 1
    Email author
  • Tyler Torgerson
    • 1
  • Nathan A. Ley
    • 1
  • Keirsten Gomez
    • 1
  • Othmane Benafan
    • 2
  • Marcus L. Young
    • 1
  1. 1.Department of Materials Science and EngineeringUniversity of North TexasDentonUSA
  2. 2.Structures and Materials DivisionNASA Glenn Research CenterClevelandUSA

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