Dependence of the functional characteristics of thermomechanically processed titanium nickelide on the size of the structural elements of austenite
| Autor: | K. A. Polyakova-Vachiyan, E. P. Ryklina, S. M. Dubinskii, Sergey Prokoshkin |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Austenite Nanostructure Materials science Annealing (metallurgy) Alloy Metallurgy 02 engineering and technology Shape-memory alloy engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Nanocrystalline material 0103 physical sciences Materials Chemistry engineering Substructure 0210 nano-technology |
| Zdroj: | The Physics of Metals and Metallography. 117:817-827 |
| ISSN: | 1555-6190 0031-918X |
| Popis: | Effect of the size of the elements of the mixed structure of B2 austenite, which consists of nanosized grains and subgrains of a polygonized substructure, on the functional properties of the Ti–50.7 at % Ni alloy preliminarily subjected to a low-temperature thermomechanical treatment (LTMT) and post-deformation annealing (PDA), has been investigated. The generation of the shape-memory effect (SME) and reversible two-way SME (TWSME) was performed using bending deformation. A maximum (for the Ti–Ni alloys) value of the recovery strain er = 15.5 ± 0.5% has been obtained after annealing at 600°C for 1 h (recrystallized structure) and after LTMT + PDA at 430°C for 10 h (mixed nanocrystalline and nanosubgrain structure). The behavior of the parameters of the SME and TWSME in different structural states has been considered. A comparative study of the effect of the temperature and time of holding at a temperature upon the PDA on the formation of the microstructure and submicrostructure of the B2 austenite has been performed. |
| Databáze: | OpenAIRE |
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