Effect of hydrogen solubility on the internal friction of V-Ti alloys

Low-frequency internal friction measurements were performed on three V-Ti alloys containing 1, 5, and 10 at. pct Ti, respectively, to demonstrate how the internal friction spectrum changes from one that is dominated by hydride precipitation to one dominated by hydrogen in solution. It is found that the alloys with low hydrogen solubility exhibit a broad damping peak at temperatures that can be associated with hydride precipitation. As the hydrogen solubility increases, the peaks due to hydride precipitation and hydrogen in solid solution (alpha + beta) can coexist in the alloy or, as in the case of V - 10 at. pct Ti alloy containing 2.3 at. pct H (pure alpha phase), only the low-temperature hydrogen damping will occur