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Effect of Si Addition on Martensitic Transformation and Microstructure of NiTiSi Shape Memory Alloys


The effect of Si addition on microstructure and martensitic transformation of the Ni-Ti-Si SMA was investigated in this work. The Ni49−0.5xTi51−0.5xSix alloys with various amounts of silicon (2.1 ≤ × ≤ 21.1 at. pct) were prepared by the self-propagating high-temperature synthesis (SHS). Temperatures of the phase transformation increase with the increasing amount of silicon in the samples, which also causes the change of the Ti/Ni ratio in the matrix. The temperatures of austenite transformations are around the temperature of 373 K.

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The paper was supported from ERDF Pre-Application Research of Functionally Graduated Materials by Additive Technologies (No. CZ.02.1.01/0.0/0.0/17_048/0007350) and specific university research Grant No A1 FCHT 2020 003.

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Correspondence to Pavel Salvetr.

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Manuscript submitted April 07, 2020.

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Salvetr, P., Školáková, A., Novák, P. et al. Effect of Si Addition on Martensitic Transformation and Microstructure of NiTiSi Shape Memory Alloys. Metall Mater Trans A 51, 4434–4438 (2020).

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