The paper examines the effect of scandium and yttrium additions (up to 5 and 10 at.%, respectively) on martensitic transformations and shape memory effect in TiNi. The martensitic temperature decreases differently in quenched TiNi-ScNi and TiNi-YNi alloys. The martensitic temperature dependence on scandium concentration is linear, and doping TiNi alloy with yttrium smoothly decreases the temperature to about 30°C at 10 at.% yttrium. The martensitic transformations in both systems are accompanied by the 100% shape memory effect. When titanium is replaced by a small amount of scandium (0.01 at.%.), the nature and parameters of martensitic transformation remain unchanged.
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Translated from Poroshkovaya Metallurgiya, Vol. 48, No. 11–12 (470), pp. 111–118, 2009.
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Kudryavtsev, Y.V., Semenova, E.L. Effect of scandium and yttrium on martensitic transformations in TiNi-based alloys. Powder Metall Met Ceram 48, 700–706 (2009). https://doi.org/10.1007/s11106-010-9188-6
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DOI: https://doi.org/10.1007/s11106-010-9188-6