INVESTIGATION OF SOME NIOBIUM-BASE ALLOYS

Twenty'seven niobium-base alloys^ containing 5 w/o of aluminum, chromium^ iron^ molybdenum^ nickel, tantalum, tungsten, vanadium, or zirconium, and with an addition of 0, 9.5, or 19.0 w/o titanium, were examined for workability, ductility, hardness at room temperature and 1600 F, and oxidation resistance at 1800 F. Addition of titanium generally improved workability, increased hot hardness, and promoted oxidation resistance.Some exceptions to this pattern were noted: ike hardest alloy at 1600 F, niobium-S w/o zirconium, softened with added titanium, and the oxidation resistance of the niobiuM'S w/o molybdenum and the niobium-5 w/o vanadium alloys was not increased by additions of titanium.