A series of three Hydrogen in Titanium Alloy Standard Reference Materials (SRMs 2452, 2453, and 2454) were prepared with hydrogen mass fractions bracketing the hydrogen specification limit of 125 mg/kg. Commercial titanium alloy Ti6Al4V (6 % aluminum, 4 % vanadium) was heated under vacuum in a furnace to remove native hydrogen, then doped with a measured quantity of hydrogen. Prompt gamma-ray activation analysis was used to determine hydrogen in the degassed material and finished SRMs. A combination of preparation data and PGAA measurement was used to certify the hydrogen mass fraction of each. The certified hydrogen mass fractions are 62.5 mg/kg ± 1.6 mg/kg for SRM 2452, 114 mg/kg ± 5 mg/kg for SRM 2453, and 211 mg/kg ± 4 mg/kg for SRM 2454.
Citation: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Pub Type: Journals
titanium alloys, hydrogen, standard reference materials, activation analysis, neutrons, prompt gamma rays