Optimizing strength and corrosion resistance of the metastable β-alloy Ti–35Nb–7Zr–5Ta alloy by equal-channel angular pressing
Controlling the microstructure of the Ti–35Nb–7Zr–5Ta alloy is fundamental for enhancing its strength and corrosion resistance in biomedical applications. This study examines how microstructural evolution through equal-channel angular pressing (ECAP) at room temperature and 300 °C influences Young&#...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | Brasil |
| Institución: | Universidade Estadual Paulista (UNESP) |
| Repositorio: | Repositório Institucional da UNESP |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unesp.br:11449/303676 |
| Acceso en línea: | http://dx.doi.org/10.1016/j.jmrt.2025.01.136 https://hdl.handle.net/11449/303676 |
| Access Level: | acceso abierto |
| Palabra clave: | ECAP EIS Microstructure Polarization XPS analysis Young's modulus β-titanium alloy |
| Sumario: | Controlling the microstructure of the Ti–35Nb–7Zr–5Ta alloy is fundamental for enhancing its strength and corrosion resistance in biomedical applications. This study examines how microstructural evolution through equal-channel angular pressing (ECAP) at room temperature and 300 °C influences Young's modulus, hardness, and corrosion resistance. ECAP refines grain size and promotes nanocrystalline β-phase grains, α phase decomposition, and ω phase precipitation. Room temperature ECAP decreases Young's modulus by reducing the β-phase stability due to deformation, while 300 °C processing enhances hardness and Young's modulus due to finer microstructure and higher ω-phase fraction. Grain refinement accelerates passivation kinetics, enhancing corrosion resistance with a thicker and less defective passive film, especially at 300 °C, without significant changes in the elemental composition of the outer passive film. |
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