Latent Cracking of Tantalum-Titanium Welds Due to Hydrogen ...
Therefore, a low hydrogen concentration of, say, 10 ppm (μg/g) hydrogen by weight in tantalum translates into a concentration of 37 ppm (μg/g) by weight in the titanium joined to the tantalum. The arrangement of tantalum wire and titanium sheet metal is sketched in Fig. 1 .