INFLUENCE OF COOLING RATE IN THE PROCESS OF HARDENING ON THE AGING AND FORMATION OF THE MECHANICAL CHARACTERISTICS OF VT22 TITANIUM ALLOY

摘要

We study the influence of the rate of cooling from the temperature of solid-beta -solution treatment on the mechanism of decomposition of the metastable beta-phase of VT22 titanium alloy under the conditions of subsequent aging, its final microstructure, and mechanical properties. The procedure of hardening in water increases the number of point defects, which leads to the decomposition of the metastable beta-phase with the formation of intermediate omega- and alpha ''(alpha') -phases. As a result, the mechanical characteristics of alloys increase due to the formation of more homogeneous and more dispersed microstructures.