Abstract
The physicomechanical behavior of a cylindrical spring made of titanium nickelide is experimentally studied during thermal cycling through the martensitic transformation ranges at a constant tensile force. The spring exhibits a reversible change in the length and the diameter, the relative change in the length reaches 1476%, and the relative change in the diameter is 33%. The alternation of reciprocating rotary motion and translational motion of the spring is observed during deformation. A method is proposed to estimate the stresses and the strains that appear in the material at large spring elongations. Thermal cycling at a constant axial force is shown to be accompanied by a reversible hysteretic change in the tangential and normal stresses and the shear strains and by a reversible hysteretic reversible change in the axial strains.
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Original Russian Text © I.N. Andronov, M.Yu. Demina, L.S. Polugrudova, 2015, published in Deformatsiya i Razrushenie Materialov, 2015, No. 5, pp. 20–27.
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Andronov, I.N., Demina, M.Y. & Polugrudova, L.S. Calculation-experimental analysis of the thermocyclic deformation of titanium nickelide coil springs. Russ. Metall. 2016, 300–306 (2016). https://doi.org/10.1134/S0036029516040029
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DOI: https://doi.org/10.1134/S0036029516040029