Metallurgical Engineering

Metallurgical Engineering

Influence of Hf Solute Addition on the Shape Memory and Superelastic Behavior of NiTi Alloy

Document Type : Research Paper

Authors
Sepideh Sadat Hosseini Noorabadi 1
Mahmoud Nili-Ahmadabadi 2
1 Student of M.Sc, School of Metallurgy and Materials Engineering, University of Tehran, Tehran, Iran.
2 Professor, School of Metallurgy and Materials Engineering, University of Tehran, Tehran, Iran.
10.22076/me.2019.104593.1235
Abstract
NiTi alloys (SMAs) are unique alloys, which have two attractive properties, shape memory effect and superelastic behaviour. Each property strongly depends on the composition, temperature and structure. The microstructure was investigated by optical microscopy, and chemical composition was analyzed using line scan analysis with energy dispersive X-ray spectroscopy. X-ray Diffraction (XRD) analysis of the bulk samples was conducted. The transformation temperatures were measured by Dilatometry. The shape memory and superelastic behavior of material were investigated using loading-unloading test and in-situ thermal cycling by applying electrical current at the end of sample and the shape changes of the bi-layers were recorded using a digital camera. The solute addition of Hf to NiTi alloy, led to a Two-way shape memory effect after tensile deformation. The Hf solute additions on NiTi alloy provides bell-curve shape memory behaviour during stress-free thermal cycling after 12 percent tensile deformation which demonstrates the acute influence of Hf additions on the material's properties.
Keywords
NiTiHf alloy
Shape memory
Superelasticty
Solute Addition
Hafnium
[1] G. Brook, “Applications of Titanium-Nickel Shape Memory Alloys”, Materials and Design, 4, 835-840, 1983.
[2] M. H. Elahinia, M. Hashemi, M. Tabesh, and S. B. Bhaduri, “Manufacturing and Processing of NiTi Implants”, A Review Progress in Materials Science, 57, 911-946, 2012.
[3] S. Miyazaki and K. Otsuka, “Development of Shape Memory Alloys”, ISIJ International, 29, 353-377, 1989.
[4]  M. Mohri, M. Nili-Ahmadabadi, J. Ivanisenko, R. Schwaiger, H. Hahn and V. Sai Kiran Chakravadhanula, “Microstructure and Mechanical Behavior of a Shape Memory Ni–Ti Bi-layer Thinfilm”, Journal of Thin Solid Films, 583, 245–254, 2015.
[5] J. Khalil-allafi, A. Dlouhy, and G. Eggeler, “Ni 4 Ti 3 -precipitation during aging of NiTi shape memory alloys and its influence on martensitic phase transformations,” vol. 50, pp. 4255–4274, 2002.
[6]      J. Ma, I. Karaman, and R. Noebe, “High temperature shape memory alloys,” Int. Mater. Rev., 2010.
[7]        G. Firstov and J. Van Humbeeck, “High temperature shape memory alloys", problems and prospects,” J. Intell., 2006.
[8] D. Angst, P. Thoma, and M. Kao, “The Effect of Hafnium Content on the Transformation Temperatures of Ni49Ti51-xHfx. Shape Memory Alloys,” J. Phys. IV, 1995.
[9] D. Abujudom, M. Kao, P. Thoma, and D. Angst, “High transformation temperature shape memory alloy,” Pat. NumberEP 0484805, 1992.
[10] X. Meng, Y. Zheng, Z. Wang, and L. Zhao, “Shape memory properties of the Ti 36 Ni 49 Hf 15 high temperature shape memory alloy,” Mater. Lett., 2000.
[11]      X. Meng, W. Cai, Y. Zheng, Y. Tong, and L. Zhao, “Stress-induced martensitic transformation behavior of a Ti–Ni–Hf high temperature shape memory alloy,” Mater. Lett., 2002.
[12]      P. Olier, J. Brachet, and J. Bechade, “Investigation of transformation temperatures, microstructure and shape memory properties of NiTi, NiTiZr and NiTiHf alloys,” Phys. IV, 1995.
[13]  F. Yang, D. R. Coughlin, P. J. Phillips, L. Yang, A. Devaraj, L. Kovarik, R. D. Noebe, and M. J. Mills. "Structure analysis of a precipitate phase in a Ni-rich high-temperature NiTiHf shape memory alloy." Acta Materialia 61 (2013) 3335-3346.
[14] X. D. Han, R. Wang, Z. Zhang, and D. Z. Yang. "A new precipitate phase in a TiNiHf high temperature shape memory alloy." Acta materialia 46 (1998) 273-281.
[15]  R. Santamarta, R. Arróyave, J. Pons, A. Evirgen, I. Karaman, H. E. Karaca, and R. D. Noebe. "TEM study of structural and microstructural characteristics of a precipitate phase in Ni-rich Ni–Ti–Hf and Ni–Ti–Zr shape memory alloys." Acta Materialia 61 (2013)6191-6206.
[16]    X. Meng, Y. Zheng, Z. Wang, and L. Zhao, “Effect of aging on the phase transformation and mechanical behavior of Ti 36 Ni 49 Hf 15 high temperature shape memory alloy,” Scr. Mater., 2000.
[17]    M. Javadi, M. Belbasi, and M. Salehi, “Effect of aging on the microstructure and shape memory effect of a hot-rolled NiTiHf alloy,” J. Mater., 2011.
[18]    X. Meng, Y. Zheng, W. Cai, and L. Zhao, “Two-way shape memory effect of a TiNiHf high temperature shape memory alloy,” J. Alloys Compd., 2004.
[19]    X. Meng, W. Cai, Y. Zheng, Y. Tong, and L. Zhao, “Stress-induced martensitic transformation behavior of a Ti–Ni–Hf high temperature shape memory alloy,”
[20]    B. S. Shariat et al., “Functionally graded shape memory alloys: Design, fabrication and experimental evaluation,” Mater. Des., vol. 124, pp. 225–237, 2017.
[21] M.S. Shakeri; J. Khalil-Allafi; V. Abbasi-Chianeh; Arash Ghabchi, “The influence of Ni4Ti3 precipitates orientation on two-way shape memory effect in a Ni-rich NiTi alloy,”Journal of Alloys and Compounds, volume 485, issue 1-2 ,2009.

  • Receive Date 02 March 2019
  • Revise Date 14 May 2019
  • Accept Date 26 May 2019