The Structure and Shape Memory of the Hot Extruded NiTi Alloy

Tomasz Goryczka; Zdzisław Lekston; Jerzy Dybich; Maciej Zubko; Tadeusz Wierzchoń; Danuta Stróż; Józef Lelątko

doi:10.4028/www.scientific.net/KEM.687.19

Paper Titles

The Role of Martensitic Transformation in Thermomechanical Development of Microstructure and Plasticity of Two-Phase Ti-6Al-4V Titanium Alloy
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The Structure and Properties Formation of the NiTi Shape Memory Rods after Hot Rotary Forging
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The Structure and Shape Memory of the Hot Extruded NiTi Alloy
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Microstructure and Interconnections Characteristics of Titanium Foam
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Structure and Martensitic Transformation in Ti₅₀Ni_(50-X)Nb_X (X=5; 10) Alloy Produced by Powder Metallurgy
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Correlation of Tribological Properties of Titanium Alloys with their Microstructures
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Dynamic Recrystallization in Titanium Alloys
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Influence of the Supersaturating Temperature on the Microstructure and Hardness of Ti24Nb4Zr8Sn Alloy
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 687The Structure and Shape Memory of the Hot Extruded...

The Structure and Shape Memory of the Hot Extruded NiTi Alloy

Abstract:

The paper presents results of structural studies of hot extruded NiTi shape memory alloy that is in the B2 phase at room temperature. Texture of the alloy was determined from the X-ray diffraction measurements. It was found that in result of 60 % sample reduction (at a cross-section of a bar formed by hot extrusion) weak axial texture - type <110>_B2 was formed. The volume of the grains oriented in this way was approx. 20 %. Basing on metallographic observations it was also found that the size of the grains formed as a result of the thermomechanical treatment was uniform with the average area of 1700 μm². This information is significant from the point of view of functional properties. Hot extruded alloy revealed presence of the reversible martensitic transformation. Its characteristic temperatures were slight higher than in as-cast alloy. Moreover, the extruded NiTi alloy showed 100 % of the shape recovery.

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Periodical:

Key Engineering Materials (Volume 687)

Pages:

19-24

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.687.19

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Online since:

April 2016

Authors:

Tomasz Goryczka*, Zdzisław Lekston, Jerzy Dybich, Maciej Zubko, Tadeusz Wierzchoń, Danuta Stróż, Józef Lelątko

Keywords:

Hot Extrusion, NiTi Shape Memory Alloy, One Way Shape Memory Effect, Phase Transitions, Texture

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References

[1] H. Funakubo, Ed., Shape memory alloys, Gordon and Breach Science Publishers, Amsterdam, (1987).

Google Scholar

[2] K. Otsuka, X. Ren, Physical Metalurgy of Ni-Ti-Based Shape Memory Alloys, Prog. Mater. Sci. 50 (2005) 511-678.

DOI: 10.1016/j.pmatsci.2004.10.001

Google Scholar

[3] Shape memory alloys for biomedical applications, ed. by T. Yoneyama, and S. Miyazaki, Woodhead Publishing Limited, Cambridge, England, (2009).

Google Scholar

[4] H. Morawiec, Shape Memory Alloys and Their Application (in Polish), Printing House of the Silesian University, Katowice, Poland (2014).

Google Scholar

[5] M.H. Elahina, M. Hashemi, M. Tabesh, S.B. Bharudi, Manufacturing and Processing of NiTi Implants, Prog. Mater. Sci., 57 (2012) 911-946.

Google Scholar

[6] C.M. Jackson, H. j. Wagner, R.J. Wasilewski, 55-Nitinol – The Alloy with a Memory: Its Physical Metallurgy, Properties and Applications. Rap. NASA-SP 5110, Washington, DC, 1972, pp.1-86.

Google Scholar

[7] S.M. Russell, Nitinol Melting and Fabrication, SMST-2000 Conf. Proc., ed. By S.M. Russel and A. Pelton, Asilomar, 2001, pp.1-9.

Google Scholar

[8] Tuissi, P. Bassani, A. Mangioni, L. Toia, F. Butera, Fabricatio Process and Characterisation of NiTi Wires for Actuators, SMST-2004, Conf. Proc., ed. By M. Mertman, 2004, pp.501-508.

Google Scholar

[9] Z. Lekston, M. Zubko, K. Prusik, D. Stróż, Microstructure, Phase Transformations, and Properties of Hot-Extrudet Ni-Rich NiTi Shape Memory Alloy, J. Mater. Eng. Perform. 23 (7) (2014) 2362-2367.

DOI: 10.1007/s11665-014-1068-7

Google Scholar

[10] T. Goryczka, Martensitic transformation in NiTiCo strip produced by twin roll casting, Mat. Sci. Eng. A 481–482 (2008) 676–679.

DOI: 10.1016/j.msea.2007.03.116

Google Scholar

[11] T. Goryczka, P. Ochin, Characterization of a Ni50Ti50 shape memory strip produced by twin roll casting Technique, J. Mat. Proc. Tech., 162–163 (2005) 178-183.

DOI: 10.1016/j.jmatprotec.2005.02.029

Google Scholar

[12] H. Inoue, N. Miwat, N. Inakazu, Texture and shape memory strain in TiNi alloy sheets, Acta Mater. 44 (1996) 4825-4834.

DOI: 10.1016/s1359-6454(96)00120-6

Google Scholar