Abstract
Pseudoelasticity caused by pseudotwinning in short-range ordered In-Pb alloys (6, 8 and 11.6 at. % Pb) is studied in the temperature range 0.48–180 K. The mechanical hysteresis parameters, namely, the thermodynamic stress τ T which provides the reversibility of plastic deformation and the frictional stress τ f which characterizes the resistance offered by crystal lattice and its defects to twin boundaries motion are estimated. It is found that athermal processes determine the reversible deformation: the mechanical parameters τ T and τ f do not depend on temperature and strain rate. The stress τ T increases and the stress τ f decreases with increasing Pb content. One of the main conditions of the exhibition of superelasticity is the fulfillment of the inequality τ T >τ f .
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Natsik, V.D., Fomenko, L.S. & Lubenets, S.V. Elastic shape memory effect in In-Pb alloys in the temperature range 0.48–180 K. centr.eur.j.phys. 1, 235–245 (2003). https://doi.org/10.2478/BF02476294
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DOI: https://doi.org/10.2478/BF02476294
Keywords
- In-Pb alloys
- pseudoelasticity
- pseudotwinning
- mechanical hysteresis parameters
- concentration dependence