Hydriding of Titanium.

Electrochemical Investigation and Identification of Titanium Hydrides Formed in Mixed Chloride Sulfuric Acid Solution

“…3,[20][21][22] Titanium hydrides have been associated with stress-corrosion cracking (SCC) and increased susceptibility toward hydrogen-induced cracking (HIC) of titanium equipment. 1,[23][24][25][26] Numakura et al 21 found that the α-matrix titanium around the hydride was subject to large stress due to the larger specific volume of the hydride. The compressive stress developed in the hydride layer during hydrogen charging was found to increase proportionally to the quantity of the hydrides formed.…”

“…25 Titanium hydrides were also found to form in the vicinity of crack tips, where crack propagation proceeded through the hydrides 1 or along the hydride-matrix interface. 1,23,26 The mechanical properties of the hydrides are strongly related to the degradation of the mechanical properties of Ti. Setoyama et al 27 investigated bulk titanium hydrides, which were prepared by gaseous hydrogen charging.…”