2026/05/13 by D. Errandonea, R. Turnbull, P. Botella +3
Engineering · Materials Science · Physics and Astronomy · #Intermetallics and Advanced Alloy Properties #Metal and Thin Film Mechanics #Titanium Alloys Microstructure and Properties #cond-mat.mtrl-sci #physics.app-ph
paper · pdf · doi:10.1080/08957959.2026.2680429
openalex publication_date 2026/06/08 · openalex created_date 2026/06/10 · openalex updated_date 2026/06/19
High-pressure X-ray diffraction experiments were performed on Ti–Al–V alloys to investigate the effect of composition on structural stability, focusing on Ti-3Al-2.5V and comparing with pure Titanium and Ti-6Al-4V. Measurements using different pressure-transmitting media show a phase transition in Ti-3Al-2.5 V at 17–19 GPa, intermediate between pure Ti (5–10 GPa) and Ti-6Al-4V (∼30 GPa). Despite variations arising from the choice of pressure medium, the transition pressure shows a clear and systematic increase with higher Al and V content. Equation-of-state analysis indicates that the bulk modulus remains nearly unchanged across compositions. This suggests a decoupling between elastic properties and phase stability, with alloying primarily affecting the transition pressure rather than compressibility. These results highlight the role of composition in tuning high-pressure phase transformations in Ti-Al-V based alloys.