Effect of Heat Treatment and Thermohydrogen Treatment on the Structure and Mechanical Properties of a VT22 Alloy

The possibilities of controlling the morphology and size of the structural constituents in a VT22 titanium alloy by changing the temperature and time parameters of treatment are demonstrated. A coarse-lamellar structure with α lamellae more than 20 μm long is found to form in the alloy upon cooling from the β region at a rate of 0.002 K/s, and a fine-grained α + β structure with α particles less than 0.3 μm in size forms during thermohydrogen treatment, which includes high-temperature vacuum annealing.