Study of the effect of cooling/heating rate on the thermal properties of Ni-Ti alloy (SMA) after annealing at different parameters
Krzysztof Kuś
University of Warmia nad Mazury in OlsztynAbstract
This research focused on evaluation of the effect of different cooling/heating rates by differential scanning calorimetry (DSC) on changes in the phase transformation parameters of Ni-Ti shape memory alloy (SMA) following annealing at different temperatures. Samples for DSC testing were made of a spring SMA actuator. The initial study included identification of the chemical composition of the material. All the phase transformation temperatures were estimated from DSC curves using the tangent intersection method, as a commonly accepted way.
Following annealing at various selected temperatures, changes in the shapes of the calorimetric profiles recorded during heating and cooling of the material were obtained. Therefore, it is clear that annealing promotes modification of the SMA microstructure. In general, it was shown that there is influence of the cooling/heating rate performed in the DSC on the evaluated thermal characteristics of the tested material. This influence is perhaps not so pronounced if one takes the states of the material after annealing conducted at different temperatures. Regarding to the individual anneals, some of the characteristic transformation temperatures were sensitive to changes in cooling/heating rates, while others likely were not observed.
Keywords:
Ni-Ti SMA, Annealing, DSC cooling/heating rate, Transformation parametersReferences
AKGUL O., TUGRUL H.O., KOCKAR B. 2020. Effect of the cooling rate on the thermal and thermomechanical behavior of NiTiHf high-temperature shape memory alloy. Journal of Material Research, 35: 1572-1581. Google Scholar
BRAZ FERNANDES F.M., MAHESH K.K., PAULA A.S. 2013. Thermomechanical Treatments for Ni-Ti Alloys. In: Shape memory alloys – processing, characterization and applications. Ed. F.M.B. Fernandes. InTechOpen, p. 3-26. https://doi.org/10.5772/2576 Google Scholar
DLOUHY A., KHALIL-ALLAFI J., EGGELER G. 2003. Multiple-step martensitic transformations in Ni-rich NiTi alloys – An in-situ transmission electron microscopy investigation. Philosophical Magazine, 83(3): 339-363. Google Scholar
HABERLAND CH.H., KADKHODAEI M., ELAHINIA M.H. 2016. Introduction. In: Shape memory alloy actuators: design, fabrication, and experimental evaluation. First Edition. Ed. M.H. Elahinia. John Wiley & Sons, New York. Google Scholar
IVANOV A.M., BELYAEV S.P., RESNINA N.N., ANDREEV V.A. 2019. Influence of the cooling/heating rate on the martensitic transformation and functional properties of the quenched Ni51Ti49 shape memory alloy. Letters on Materials, 9(4): 485-489. Google Scholar
KAYA I., ÖZDEMIR Y., KAYA E., KESKIN M. E. 2019. The heating-cooling rate effect on thermal properties of high nickel-rich NiTi shape memory alloy. Journal of Thermal Analysis and Calorimetry, 139: 817-822. Google Scholar
Memry Corporation. Inspections/Testing. Retrieved from https://www.memry.com/inspections-testing (access 24.06.2024) Google Scholar
NURVEREN K., AKDOĞAN A., HUANG W.M. 2008. Evolution of transformation characteristics with heating/cooling rate in NiTi shape memory alloys. Journal of Materials Processing Technology, 196: 129-134. Google Scholar
OSHIDA Y., TOMINAGA T. 2020. Nickel-titanium materials. Biomedical applications. De Gruyter, Berlin, Boston. https://doi.org/10.1515/9783110666113 Google Scholar
SHAW J.A., CHURCHILL C.B., IADICOLA M.A. 2008. Tips and tricks for characterizing shape memory alloy wire. Part 1. Differential scanning calorimetry and basic phenomena. Experimental Techniques, 32: 55-62. Google Scholar
Standard Test Method for Transformation Temperature of Nickel – Titanium Alloys by Thermal Analysis, ASTM F2004-00, ASTM, 100 BarrHarbor Drive, West Conshohocken, PA, 19428. Google Scholar
TANG W., SANSTRÖM R., WEI Z.G., MIYAZAKI S. 2000. Experimental Investigation and Thermodynamic Calculation of the Ti-Ni-Cu Shape Memory Alloys. Metallurgical and Materials Transactions A, 31A: 2423-2430. Google Scholar
TURABI A.S., SAEDI S., SAGHAIAN S.M., KARACA H.E., ELAHINIA M.H. 2016. Experimental characterization of shape memory alloys. In: Shape memory alloy actuators: design, fabrication, and experimental evaluation. First Edition. Ed. M.H. Elahinia. John Wiley & Sons, New York. Google Scholar
WANG J. 2013. Multiple memory material processing for augmentation of local pseudoelasticity and corrosion resistance of niti-based shape memory alloys. Master thesis. University of Waterloo. Google Scholar
WANG Z.G., ZU X.T., HUO Y. 2005. Effect of heating/cooling rate on the transformation temperatures in TiNiCu shape memory alloys. Thermochimica Acta, 436: 153-155. Google Scholar
WU S.K., CHANG Y. C. 2019. Thermal cycling effect on transformation temperatures of different transformation sequences in TiNi-based shape memory alloys. Materials (Basel), 12(16): 2512. Google Scholar
University of Warmia nad Mazury in Olsztyn
