Effect of Hydrogen on Young’s Modulus and Internal Friction of V–4Ti–4Cr Alloy

We studied Young’s modulus and internal friction of the V–4Ti–4Cr alloy with different hydrogen impurity concentrations in the temperature range of 100–300 K at oscillation frequencies of ~100 kHz. Hydrogenation of the alloy causes a minimum in the Young’s modulus temperature dependence due to the precipitation/dissolution of vanadium monohydride particles and a relaxation peak in the temperature spectrum of internal friction at ~140 K, which can be associated with Snoek-type hydrogen relaxation due to the interaction of hydrogen atoms with titanium atoms.