Influence of low-temperature annealing time on the evolution of the structure and mechanical properties of a titanium Ti-Al-V alloy in the submicrocrystalline state

• Published in: Physics of metals and metallography 2015-03, Vol.116 (3), p.302-308
• Main Authors: Ratochka, I. V., Lykova, O. N., Naidenkin, E. V.
• Format: Article
• Language: English
• Subjects: Analysis; Annealing; Chemistry and Materials Science; Compressing; Deterioration; Evolution; Formations; Grains; Materials Science; Mechanical properties; Metallic Materials; Specialty metals industry; Strength and Plasticity; Titanium; Titanium alloys; Titanium base alloys
• ISSN: 0031-918X; 1555-6190
• DOI: 10.1134/S0031918X15030114

The effect of annealing at 673 K for 6–24 h on the structural and phase state and mechanical properties of the titanium alloy of a Ti-Al-V system that was previously subjected to severe plastic deformation by uniform compression deformation, has been studied. It has been established that these annealings lead to a nonmontonic dependence of the mechanical properties of the alloy on the annealing time. It has been shown that the annealing of the Ti-Al-V alloy in a submicrocrystalline state is accompanied by simultaneous hardening processes, i.e., the formation of fine particles during phase transformations and the formation of new nanosized grains, and softening processes, i.e., recovery processes and the growth grains to micron sizes. The prevalence of a given process during annealing determines the deterioration or improvement of the alloy’s mechanical properties.