Abstract
Comparative studies are conducted on the structure and mechanical properties of the ultrafine-grained Ti-5Al-5V-5Mo-1Cr-1Fe alloy obtained by abc pressing and radial shear rolling with subsequent aging. It is shown that the ultrafine-grained structure formed by these methods provides increased strength properties both in tension and in three-point bending compared to the initial coarse-grained state. At the same time, the alloy obtained by abc pressing demonstrates a higher resistance to fracture during three-point bending compared to the alloy obtained by radial shear rolling + aging due to its enhanced ductility. This also determines the ductile pattern of fracture of the ultrafine-grained alloy obtained by abc pressing during three-point bending in contrast to brittle-ductile fracture of the alloy obtained by radial shear rolling + aging.
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