AGING EFFECTS ON TRANSFORMATION TEMPERATURES AND ENTHALPIES FOR TiNi ALLOY

Yıl 2018, Cilt: 2 Sayı: 1, 7 - 11, 01.01.2018

Canan Aksu Canbay İskender Özkul

https://doi.org/10.31127/tuje.327978

Cited By: 4

Öz

Shape memory alloys are frequently used today. For this reason, researches are more focused on this subject. In this study, transformation temperature and enthalpy changes caused by aging of TiNi alloy were investigated from thermally induced shape memory alloys. The results obtained from the experiments performed in 21 different aging environments were evaluated by using graphs. The results showed us how effective the variable parameters used in the experiments are on the alloy.                                                                                                                                                                                                                                                                                                                        

Anahtar Kelimeler

aging effect, shape memory alloy, TiNi, DSC, Martensitic Transformation

Kaynakça

• Birman, V. (1997). "Review of mechanics of shape memory alloy structures." Applied Mechanics Reviews, Vol. 50, No., pp. 629-646.
• Canbay, C. A., A. Tekataş and İ. Özkul (2017). "Fabrication of Cu-Al-Ni Shape Memory Thin Film By Thermal Evopration." Turkish Journal of Engineering (TUJE), Vol. 1, No. 2, pp. 27-32.
• Es-Souni, M., M. Es-Souni and H. Fischer-Brandies (2005). "Assessing the biocompatibility of NiTi shape memory alloys used for medical applications." Analytical and bioanalytical chemistry, Vol. 381, No. 3, pp. 557-567.
• Frenzel, J., E. P. George, A. Dlouhy, C. Somsen, M.-X. Wagner and G. Eggeler (2010). "Influence of Ni on martensitic phase transformations in NiTi shape memory alloys." Acta Materialia, Vol. 58, No. 9, pp. 3444-3458.
• Jani, J. M., M. Leary, A. Subic and M. A. Gibson (2014). "A review of shape memory alloy research, applications and opportunities." Materials & Design, Vol. 56, No., pp. 1078-1113.
• Lagoudas, D. C. (2008). Shape memory alloys: modeling and engineering applications, Springer Science & Business Media, Usa.
• Otubo, J., O. Rigo, A. Coelho, C. M. Neto and P. Mei (2008). "The influence of carbon and oxygen content on the martensitic transformation temperatures and enthalpies of NiTi shape memory alloy." Materials Science and Engineering: A, Vol. 481, No., pp. 639-642.
• Shabalovskaya, S. A. (1996). "On the nature of the biocompatibility and on medical applications of NiTi shape memory and superelastic alloys." Bio-medical materials and engineering, Vol. 6, No. 4, pp. 267-289.
• Stachowiak, G. and P. McCormick (1988). "Shape memory behaviour associated with the R and martensitic transformations in a NiTi alloy." Acta Metallurgica, Vol. 36, No. 2, pp. 291-297.
• Van Humbeeck, J. (2001). "Shape memory alloys: a material and a technology." Advanced Engineering Materials, Vol. 3, No. 11, pp. 837-850.
• Wayman, C. (1993). "Shape memory alloys." MRS bulletin, Vol. 18, No. 4, pp. 49-56.
• Yamauchi, K., I. Ohkata, K. Tsuchiya and S. Miyazaki (2011). Shape memory and superelastic alloys: Applications and technologies, Elsevier.