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SANDWICH-BRAZED TITANIUM MOLYBDENUM-CONSTRUCTION METHODS FOR-DEVELOPMENT OF
GENERAL DYNAMICS/FORT WORTH TEX
The brazing characteristics of 4 high temperature brazing alloys foil Cu, AMS-4775 Nicrobraz, Coast no. 50, Nicrobraz no. 45 were evaluated by brazing small tee specimens in both Ar and H atmospheres at various times and temperatures. The evaluations were based on both visual and metallographic examinations. The use of H, as compared to Ar, seemed to improve wettability and flowability in the alloys which were deficient in these characteristics. Indications are that the use of H makes possible the use of a 50 to 100 F lower brazing temperature. A small section of simulated sandwich, made up of 0.5 Ti-moly alloy skins and a hand-formed section of .001 in. thick pure molybdenum foil as core, was brazed with AMS-4775 Nicrobraz alloy a very satisfactory brazed sandwich was produced. Author
AF33 657 7248