When the temperature values are considered, remarkably increase is observed after 200 °C.
📌 3 Key Takeaways
🎯
Objective & Hypothesis:TiNi alloys are used in places where requiring precision jobs for the last few decades.
📊
Key Findings & Data:Three different temperature values and seven waiting periods applied and totally 22 experiments were conducted and the results were examined.
💡
Conclusion & Impact:When the temperature values are considered, remarkably increase is observed after 200 °C.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Shape memory alloy · TiNi · Aging
Abstract
TiNi alloys are used in places where requiring precision jobs for the last few decades. Thermally induced shape memory alloys such as TiNi, exposures in use and the temperature causes the aging effects on alloy. In our experimental study, we have aimed to investigate of aging effects depends on time and temperatures for TiNi alloys. Three different temperature values and seven waiting periods applied and totally 22 experiments were conducted and the results were examined. Time depended results, especially for 200 °C samples exhibited more stable state than 300 and 400 °C. When the temperature values are considered, remarkably increase is observed after 200 °C.
Özkul, İ., Canbay, C. A. (2018). Investigation of Thermomechanical Behaviors of Aged Ti55.68Ni44.32 Alloys. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering, Cilt: 19 - Sayı: 2, 368–374. https://ajindex.com/articles/196812
Muralles, M., et al. 2017.Phase transformations, detwinning and superelasticity of shape-memory NiTi from MEAM with practical capability. Computational Materials Science. 130(2017), 138-143
Akkera, H.S., I. Singh, and D. Kaur. 2017.Room temperature magnetocaloric effect in Ni-Mn-In-Cr ferromagnetic shape memory alloy thin films. Journal of Magnetism and Magnetic Materials. 424(2017), 194-198
Endoh, K., et al. 2017.Effect of Sn and Zr addition on the martensitic transformation behavior of Ti-Mo shape memory alloys. Journal of Alloys and Compounds. 695(2017), 76-82
Peng, Q., J. Huang, and M. Chen. 2016.Effects of demagnetization on Magnetic-Field-Induced Strain and microstructural evolution in Ni-Mn-Ga Ferromagnetic Shape Memory Alloy by phase-field simulations. Materials & Design. 107(2016), 361-370
Qu, W., et al. 2017.Phase transformation and microstructure evolution of the deformed Ti-30Zr-5Nb shape memory alloy. Materials Characterization. 2017)
Yang, Z., et al. 2016.Martensitic transformation and shape memory behavior of Ti-V-Al-Fe lightweight shape memory alloys. Journal of Alloys and Compounds. 680(2016), 462-466
Yi, X., et al. 2017.Martensitic transformation behaviors and mechanical properties of (Ti 36 Ni 49 Hf 15) 100-x Y x high temperature shape memory alloys. Journal of Alloys and Compounds. 705(2017), 98-104
Wu, S., H. Lin, and T. Lin. 2006.Electrical resistivity of Ti–Ni binary and Ti–Ni–X (X= Fe, Cu) ternary shape memory alloys. Materials Science and Engineering: A. 438(2006), 536-539
Liu, F., et al. 2006.A study on TiNi (Fe, Mo) shape memory alloy. Materials Science and Engineering: A. 438(2006), 896-899
Zhou, Y., et al. 2010.Strain glass in doped Ti 50 (Ni 50− xDx)(D= Co, Cr, Mn) alloys: implication for the generality of strain glass in defect-containing ferroelastic systems. Acta Materialia. 58(2010), 5433-5442
Otsuka, K. and C.M. Wayman. 1999. Shape memory materials. Cambridge university press
Ren, X., et al. 2001.A comparative study of elastic constants of Ti–Ni-based alloys prior to martensitic transformation. Materials Science and Engineering: A. 312(2001), 196-206
Liu, Y., H. Yang, and A. Voigt. 2003.Thermal analysis of the effect of aging on the transformation behaviour of Ti–50.9 at.% Ni. Materials Science and Engineering: A. 360(2003), 350-355
Carroll, M., C. Somsen, and G. Eggeler. 2004.Multiple-step martensitic transformations in Ni-rich NiTi shape memory alloys. Scripta