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Effect of Cooling and Annealing Conditions on the Microstructure, Mechanical and Superelastic Behavior of a Rotary Forged Ti–18Zr–15Nb (at. %) Bar Stock for Spinal Implantsстатья
- Авторы: Lukashevich Konstantin, Sheremetyev Vadim, Komissarov Alexander, Cheverikin Vladimir, Andreev Vladimir, Prokoshkin Sergey, Brailovski Vladimir
- Журнал: Journal of functional biomaterials
- Том: 13
- Номер: 4
- Год издания: 2022
- Издательство: MDPI
- Местоположение издательства: Basel, Switzerland
- Первая страница: 259
- DOI: 10.3390/jfb13040259
- Аннотация: In this work, the microstructure, phase state, texture, superelastic and mechanical properties of a Ti–18Zr–15Nb (at. %) shape memory alloy subjected to a combined thermomechanical treatment, including hot rotary forging with either air cooling or water quenching and post-deformation annealing are studied. It was revealed that the main structural component of the deformed and annealed alloy is BCC β-phase. With an increase in the forging temperature from 600 to 700 °C, the average grain size increases from 5.4 to 17.8 µm for the air-cooled specimens and from 3.4 to 14.7 µm for the water-quenched specimens. Annealing at 525 °C after forging at 700 °C with water quenching leads to the formation of a mixed statically and dynamically polygonized substructure of β-phase. In this state, the alloy demonstrates the best combination of functional properties in this study: a Young’s modulus of ~33 GPa, an ultimate tensile strength of ~600 MPa and a superelastic recovery strain of ~3.4%
- Добавил в систему: Чеверикин Владимир Викторович