Kinetics and thermodynamics of the absorption of hydrogen in beta-titaniumalloys

A thermogravimetric method was applied to study the hydrogen uptake in the near-beta titanium alloy Ti 10 2 3 and the metastable beta-titanium alloy T i 21S. The tests were performed in H-2-He gas mixtures with various partial pressures of H-2 at temperatures between 600 and 800 degrees C. Basic findings such as the decreasing solubility of H2 With increasing temp erature could be verified, and first information on the effects of surface conditions was gained. Thus, it could be shown that, despite the low atomic mass of hydrogen, thermogravimetry is an appropriate tool for investigatio n of the H-2/metal interactions of titanium alloys.