Abstract
The mechanism of the formation and modification of macrodefects containing atoms of light elements upon melting and thermal and mechanical treatment of titanium alloys has been studied. To this end, an approach based on the investigation of the concentration distribution of oxygen, nitrogen, and carbon in the zone of a macrodefect using nuclear microanalysis with a locality of measurements over the sample surface to about 90 μm has been used. It has been established that a decrease in the concentration of carbon in tungstencarbide-based macrodefects upon alloy melting occurs according to the diffusion mechanism. The same mechanism is characteristic of the process of dissolution of defects of deformation origin, such as titanium oxynitrides, upon solid-state heat treatment.
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