Abstract
We studied the effect of hydrogen on the cyclic endurance of cylindrical specimens made of VT6Ch titanium alloy for various parameters of cyclic loading, coefficients of asymmetry of a cycle, coefficients of stress concentration, and load frequencies. The specimens were cut from plates with a lamellar structure at different angles with the rolling direction. In all cases where hydrogen was present in the solid solution, the limit of its bounded corrosion endurance in the initial state increased. This is probably caused by hardening of the solid solution and by separation of dispersed hydrides. At concentrations of hydrogen ≥0.03% (by mass), under the action of cyclic loading, hydrides separate from the supersaturated solution. They play the role of stress concentrators and lead to a decrease in cyclic endurance.
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