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Title: The heating-cooling rate effect on thermal properties of high nickel-rich NiTi shape memory alloy
Authors: Kaya, İrfan
Özdemir, Yalçın
Kaya, Eren
Keskin, Mehmet Emin
Keywords: Ni-rich NiTi
Shape memory alloy
Heating rate effect
Activation energy
Thermal properties
Issue Date: 2020
Publisher: Springer
Abstract: In this study, the effects of heating and cooling rate on the thermal properties of high nickel-rich Ni55Ti45 shape memory alloy were investigated. Transformation temperatures and enthalpies were determined by differential scanning calorimetry. R-phase was observed with two-stage phase transformation during cooling. Transformation finish temperatures were affected, while the transformation start temperatures were not changed by heating-cooling rate. Kissinger, Takhor, and Ozawa methods were applied to find activation energy that is needed for phase transformation. The average activation energy value of 200.5 kJ mol(-1) was calculated for Ni55Ti45 alloy. The calculated activation energy was found lower than the ones reported in the literature.
ISSN: 1388-6150
Appears in Collections:Matematik Bölümü Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu
WoS İndeksli Yayınlar Koleksiyonu

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