Influence of titanium alloy VT8 cooling regime after high-temperature cross-screw rolling on the structure and mechanical properties

Studies of the evolution of the structural-phase state and changes in the mechanical properties of titanium alloy VT8 after two processing modes, including helical rolling with heat treatment in the form of quenching, have been carried out. In this work, attention is paid to the cooling process after rolling by using two stages of sample cooling in different environments in the second processing mode. It is shown that as a result of a two-stage cooling rate after rolling, a homogeneous binary structure of the α- and β-phases is formed in the alloy, as a result of which it is possible to achieve a slight increase in the impact toughness and hardness. Non-uniform distribution of hardness in the volume of the bar after rolling is associated with uneven strain hardening and non-uniform rate of cooling of the bar after processing.

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