Complex alloying of titanium alloys

Conclusions

• 1. The effectiveness of complex alloying was established, in which the strength of both the α and β solid solutions increases, and the difference between their strengths decreases. This leads to more even plastic deformation and more complete utilization of the strength of the α and β phases.

• 2. The use of β stabilizing elements with distribution coefficients larger and smaller than unity is recommended in order to ensure a constant total amount of β stabilizing elements in different zones and more even decomposition of the metastable solid solution in the process of aging.

• 3. It was found that in terms of improving the mechanical properties of Ti+3% Al+β stabilizer alloys after heat treatment the β stabilizers are arranged in the following order: Cr, Fe, Cr+Fe, Mn, V+Fe, Mo+Fe, Mo, V, Mo+Cr, Mo+V, Mo+V+Cr+Fe.

• 4. Multicomponent alloy VT23 was developed, with σ_b ⩾ 145 kg/mm² after heat treatment.