EVALUATION OF REFRACTORY METAL SHEET ALLOYS,

Five columbium base alloys, three tantalum base alloys, and two molybdenum base alloys have been evaluated by the U. S. Army Materials Research Agency. Mechanical properties were determined by tensile testing at room temperature and elevated temperatures, stress rupture testing, and bend testing of base metal specimens and welded specimens. The properties of the alloys are compared with target requirements established by the Alloy Requirements and Selection Group, Materials Advisory Board. Significant progress in refractory metal sheet development is demonstrated by a comparison of the test data with target properties. In general, the properties of the alloys approached or exceeded the target requirements. (Author)