| Autor: |
Popov, N. N., Presnyakov, D. V., Larkin, V. F., Grishin, E. N., Glukhareva, S. V., Kostyleva, A. A. |
| Zdroj: |
Inorganic Materials: Applied Research; February 2023, Vol. 14 Issue: 1 p96-103, 8p |
| Abstrakt: |
Abstract: The properties of Ti50Pd50high-temperature shape memory alloy were studied comprehensively on samples made from a strip with thickness of 4.14 mm in the initial state and after various annealing modes and deformation induced conditions. The data on elemental and local phase composition, the structure, the microhardness, the temperatures of phase transformations, and the mechanical and thermomechanical properties were obtained. We found that the best average shape memory values εSME= 2.5% and ηSME= 0.29 were obtained for alloy samples after annealing (730°C, 1 min → quenching in water → annealing at 400°C, 1 h → cooling with furnace) upon heating to a temperature of T= 650°C (stable end of SME manifestation) after preliminary induced tensile deformation at TD= (540–530)°C (after heating to T= 620°C) at a rate of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\dot {\varepsilon }$$\end{document}≈ 1.2 × 10–3s–1for the same total induced strain εtot= 10%. In this case, the temperatures of start and finish of the main form recovery are Аs SME= 568°С and Аf SME= 579°С. These shape recovery temperatures are acceptable for an alloy used for safety devices. The size of the shape memory effect and the degree of its recovery, however, are insufficient to create safety devices, for example, a cutting type, in which the temperature-sensitive elements will have a plate shape. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
Full text from SpringerLink