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22-06-2020 | Communication | Issue 9/2020

Metallurgical and Materials Transactions A 9/2020

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

Journal:
Metallurgical and Materials Transactions A > Issue 9/2020
Authors:
Pavel Salvetr, Andrea Školáková, Pavel Novák, Jaroslav Vavřík
Important notes
Manuscript submitted April 07, 2020.

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Abstract

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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