Use of thermokinetic EMF and electrical resistance for quality control of elongated products made of shape memory alloy

O.A. Petrova-Burkina, V.V. Rubanik Jr., V.V. Rubanik show affiliations and emails
Received 13 July 2020; Accepted 19 August 2020;
This paper is written in Russian
Citation: O.A. Petrova-Burkina, V.V. Rubanik Jr., V.V. Rubanik. Use of thermokinetic EMF and electrical resistance for quality control of elongated products made of shape memory alloy. Lett. Mater., 2020, 10(4) 422-426
BibTex   https://doi.org/10.22226/2410-3535-2020-4-422-426

Abstract

The value of thermokinetic EMF in equiatomic titanium nickelide depends on a preliminary deformation.The behavior of the thermokinetic EMF and electrical resistance upon nonstationary heating of the elongated TiNi wire samples with a near-equiatomic composition having sections subjected to elastic and plastic deformation was studied. It was found that the thermokinetic EMF value sharply increases in the deformed zone in the 1st thermal cycle with the movement of the heating zone along the sample. The increase in the relative deformation from 1 to 30% leads to a change in thermokinetic EMF (|ΔE|) from 0.01 to 0.37 mV. If the sample undergoes deformation up to 2%, the thermokinetic EMF value in the deformation area corresponds to the value on the nondeformed section during the 2nd thermal cycle. The value of |ΔE| is increased by 0.1 mV during deformation from 2 to 10% and is not changed with an increase in deformation up to 30%. The behavior of the electrical resistance is similar to the behavior of the thermokinetic EMF when the heating zone moves along the length of the Ti-50 at.% Ni wire sample in deformed zone from 2 to 15%. The electrical resistance increases sharply upon the 1st thermal cycle in the deformation zone. The electrical resistance increases by 25 μΩ · cm with an increase in the applied deformation up to 15%. The value of electrical resistance does not change in the zone of deformation up to 2% upon the 2nd thermal cycle. When the value of applied deformation falls in the range from 5 to 15%, the electrical resistance falls by 5 ÷ 20 µΩ · cm. Deformation of the Ti-50 at.% Ni sample leads to a change in the properties of the alloy in the deformation zone, causing a shift in the characteristic temperatures of the phase transition and a change in the thermokinetic EMF and electrical resistance when the heating zone passes through the deformation zone. Changes in the thermokinetic EMF and electrical resistance as the heating region passes through the deformation zone are associated with a change in the characteristic temperatures of the phase transition. Based on the experimental data, a method and devices for determining inhomogeneous areas in elongated products made of shape memory alloys were developed. The method allows the value of thermokinetic EMF or electrical resistance to be continuously recorded during winding the wire when its section is heated above the temperature of the reverse phase transition. Tracking the change in the thermokinetic EMF or electrical resistance, it is possible to determine the sections of the material, which differ in physical properties from the predeterminated properties.

References (18)

1. V. E. Gunter et al. Medical materials and implants with shape memory effect. Tomsk, Tom. un-ty publ. (1998) 487 p. (in Russian) [В. Э. Гюнтер и др. Медицинские материалы и имплантаты с памятью формы. Томск, изд-во Том. ун-та (1998) 487 с.].
2. K. Otsuka, K. Shimizu, Y. Suzuki et al. Alloys with shape memory effect. Mosсow, Metallurgiya (1990) 224 p. (in Russian) [К. Ооцука, К. Симидзу, Ю. Судзуки и др. Сплавы с эффектом памяти формы. Москва, Металлургия (1990) 224 с.].
3. Z. G. Wei, R. Sandström, S. Miyazaki. Journal of Materials Science. 33, 3743 (1998). Crossref
4. D. Mantovani. JOM. 52 (10), 36 (2000). Crossref
5. V. Brailovski, S. Prokoshkin, P. Terriault, F. Trochu. Shape memory alloys: fundamentals, modeling and applications. Montreal, ETS Publ. (2003) 844 p.
6. V. E. Gunter et al. Titanium nickelide. Medical material of new generation. Tomsk, MIZ (2006) 296 p. (in Russian) [В. Э. Гюнтер и др. Никелид титана. Медицинский материал нового поколения. Томск, МИЦ (2006) 296 с.].
7. V. V. Rubanik, V. V. Rubanik Jr., O. A. Petrova-Burkina. Materials, technologies, tools. 17 (1), 25 (2012). (in Russian) [В. В. Рубаник, В. В. Рубаник мл., О. А. Петрова-Буркина. Материалы, технологии, инструменты. 17 (1), 25 (2012).].
8. V. V. Rubanik, V. V. Rubanik Jr., O. A. Petrova-Burkina. Materials of the 9th European Symposium on Martensitic Transformations «ESOMAT 2012». Saint-Petersberg (2012), p. 40.
9. V. V. Rubanik, V. V. Rubanik Jr, O. A. Petrova-Burkina. Materials Science Forum. 738 - 739, 292 (2013). Crossref
10. V. V. Rubanik, V. V. Rubanik Jr, O. A. Petrova-Burkina. Shape Memory & Superelastic Technology (SMST 2019). Konstanz, Germany (2019) p. 86.
11. V. V. Rubanik, V. V. Rubanik Jr., O. A. Petrova-Burkina. Letters on Materials. 2 (2), 71 (2012). (in Russian) [В. В. Рубаник, В. В. Рубаник мл., О. А. Петрова-Буркина. Письма о материалах. 2 (2), 71 (2012).]. Crossref
12. Standard Test Method for Transformation Temperature of Nickel-Titanium Alloys by Thermal Analysis: ASTM F2004-00, ASTM, 100 BarrHarbor Drive, West Conshohocken, PA, 19428.
13. J. E. Hanlon, S. R. Butler, R. J. Wasilewski. Trans. Met. Soc. AIME. 239, 1323 (1967).
14. A. S. Karolik. Proceed. Intern. Conf. computer methods and inverse problems in nondestructive testing and diagnostics, Belarus, Minsk (1995) p. 210.
15. V. V. Rubanik, A. V. Lesota, V. V. Rubanik jr. Letters on materials. 7 (2), 96 (2017). (in Russian) [В. В. Рубаник, А. В. Лесота, В. В. Рубаник мл. Письма о материалах. 7 (2), 96 (2017).]. Crossref
16. A. V. Lesota, V. V. Rubanik, V. V. Rubanik Jr. Letters on Materials. 8 (4), 401 (2018). Crossref
17. Patent BY № 19012, 28.02.2015. (in Russian) [Патент РБ № № 19012, 28.02.2015.].
18. Patent BY № 19017, 28.02.2015. (in Russian) [Патент РБ № № 19017, 28.02.2015.].

Similar papers