Research output: Contribution to journal › Article › peer-review
Strain Recovery by TiNi Element Under Fast Heating. / Volkov, Aleksandr E.; Miszuris, Wiktoria; Volkova, Natalia A.
In: Shape Memory and Superelasticity, Vol. 4, No. 1, 01.03.2018, p. 256-263.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Strain Recovery by TiNi Element Under Fast Heating
AU - Volkov, Aleksandr E.
AU - Miszuris, Wiktoria
AU - Volkova, Natalia A.
N1 - Funding Information: The work was supported by the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme FP7/2007- 2013/under REA Grant Agreement PIRSES-GA-2013-610547—TAMER. Publisher Copyright: © 2017, ASM International. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - A theoretical and experimental study of strain recovery under fast heating of a shape memory alloy (SMA) rod preliminarily stretched in the martensitic state is carried out. Two theoretical models are considered: instantaneous heating and heating with temperature variation during a finite time. In the first case, it is supposed that the straight SMA rod experiences an instantaneous reverse martensitic transformation, and in the second the transformation is supposed to progress at a rate corresponding to the temperature rate. Analytical expression for the time dependence of the rod free-end displacement is obtained. In the experiment, a wire specimen made of titanium-nickel SMA was heated by a short impulse of electric current. The variation of the specimen length in time was registered. Thus, it has been shown that the minimum operation time of an SMA actuator (time needed for the strain recovery) can be reduced to 20 µs. Comparison of the theoretical results with the experimental ones leads to the conclusion that the displacement variation in time is controlled by the rate of heating and the inertia of the specimen. The incubation time of the martensitic transformation on the microscale apparently is estimated as less than 1 µs.
AB - A theoretical and experimental study of strain recovery under fast heating of a shape memory alloy (SMA) rod preliminarily stretched in the martensitic state is carried out. Two theoretical models are considered: instantaneous heating and heating with temperature variation during a finite time. In the first case, it is supposed that the straight SMA rod experiences an instantaneous reverse martensitic transformation, and in the second the transformation is supposed to progress at a rate corresponding to the temperature rate. Analytical expression for the time dependence of the rod free-end displacement is obtained. In the experiment, a wire specimen made of titanium-nickel SMA was heated by a short impulse of electric current. The variation of the specimen length in time was registered. Thus, it has been shown that the minimum operation time of an SMA actuator (time needed for the strain recovery) can be reduced to 20 µs. Comparison of the theoretical results with the experimental ones leads to the conclusion that the displacement variation in time is controlled by the rate of heating and the inertia of the specimen. The incubation time of the martensitic transformation on the microscale apparently is estimated as less than 1 µs.
KW - Fast heating
KW - Incubation time of transformation
KW - Solution of motion equation
KW - Strain recovery
KW - Tension
UR - http://www.scopus.com/inward/record.url?scp=85071229471&partnerID=8YFLogxK
U2 - 10.1007/s40830-017-0138-8
DO - 10.1007/s40830-017-0138-8
M3 - Article
AN - SCOPUS:85071229471
VL - 4
SP - 256
EP - 263
JO - Shape Memory and Superelasticity
JF - Shape Memory and Superelasticity
SN - 2199-384X
IS - 1
ER -
ID: 37621232