Hydrogen embrittlement of pure titanium and titanium alloy in boiling nitric acid solution with cathodic charging

Ishijima, Yasuhiro ; Ueno, Fumiyoshi  ; Yamamoto, Masahiro ; Uchiyama, Gunzo ; Nojima, Yasuo*; Fujine, Sachio*

To obtain hydrogen embrittlement on pure titanium and titanium alloy in billing nitric acid solution, SSRT in boiling nitric acid solution with cathodic charging was carried out. From SSRT results, reduction of elongation did not observed with cathodic charging, fracture surface showed ductile surface, and micro-cracks were observed at the surface of specimens but did not propagated. These results suggest that pure titanium and titanium alloy were difficult to show hydrogen embrittlement in the test condition of this study.