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EVALUATION OF HIGH STRENGTH TUNGSTEN-BASE ALLOYS
Summary rept. 1 Jul 1963-30 Sep 1965
TRW INC CLEVELAND OH MATERIALS AND PROCESSES DEPT
Pagination or Media Count:
A deformation study and evaluation of high strength tungsten base alloys was accomplished. The two alloys studied included the solid solution strengthened 68 W-20 Ta-12 Mo alloy and the dispersed phase strengthened W- 12 Cb-0.29 V-0. 12 Zr-0.07 C alloy. The vacuum melting plus centrifugal casting technique was used for the consolidation of the solid solution alloy. A new type of ingot mold was developed to cast 3-inch diameter ingots. High temperature extrusion was successfully accomplished to provide 68 W-20 Ta-12 Mo bar for evaluation. Studies of upset and side forging, rolling and swaging of the solid solution alloy were made. Upset forging was the only successful technique for secondary working. The extruded bar was used to determine recrystallization behavior, tensile and creep rupture properties. The one-hour recrystallization temperature for the 68 W-20 Ta-12 Mo bar was 3300 F. The 3000 F, 3500 F and 4000 F tensile strengths of the recrystallized bar were approximately three times those of unalloyed tungsten.
APPROVED FOR PUBLIC RELEASE