Martensite phase transformation and shape memory effect in a microwire
A. V. Petrov1,
V. A. Andreev2, V. S.
Kalashnikov1, V. V.
Koledov1, V. G.
D. V. Gunderov3
Kotel'nikov Institute of Radio
Engineering and Electronics of RAS
2 "MATEK-SPF" Center
Institute of Molecule and Crystal Physics URC RAS
The paper is received on December 24, 2015
Abstract. A study of the effect of heat treatment on phase transformation
temperature of the sample microwire alloy 23 microns in diameter Ni50,5Ti49,5
obtained by drawing. It demonstrated that annealing 450⁰C in the originally
amorphous microwires results in anomaly temperature dependence of the electric
conductivity which is characteristic for the two-stage thermoelastic
martensitic transition. The martensitic transition in the samples after
annealing is observed in the range from -100 to 150⁰C. The annealed alloy
samples showed shape memory effect (SME). We discuss the use of microwires SME
in nanotechnology and technology of sensors and actuators.
Key words: shape memory alloys, thermoelastic
martensite transformation, nickel titanium, micro wire.