Abstract
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.
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Acknowledgements
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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Young, A.W., Torgerson, T., Ley, N.A. et al. Effects of Sn Addition on NiTi Shape Memory Alloys. Shap. Mem. Superelasticity 5, 125–135 (2019). https://doi.org/10.1007/s40830-018-00197-z
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DOI: https://doi.org/10.1007/s40830-018-00197-z