ROLL FORMING TUNGSTEN ROCKET NOZZLES

The roll forming process was applied to forming W into symmetrical nozzle shapes up to 12 in. in diameter with thin walls from 0.025 to 0.060 in. thick. Tungsten was used as the starting material in the form of rolled plate from 0.100 to 0.240 in. thick. The metallurgical characteristics of the W were investigated and material speci ied to suit the roll forming process. Mechanical properties of the starting material, intermediately formed parts, and the finished liners were investigated up to 5000 F. Tungsten was readily fabricated into thin walled nozzle shapes by roll forming cones to 75 deformation, and spinning these cones into nozzles. Its workability at 1800 was very similar to mild steel at room temperature. Roll formed W nozzle liners had a fine TIPSMREB OTS price 21.00 General DynamicsC ONVAIR, San Diego, Calif. TITANIUM DEVELOPMENT PROGRAM. VOLUME V. Final technical engineering rept., Dec 57-May 61, by G. D. Lindeneau, D. H. Love and others. 31 May 61, 376p. incl. illus. tables. Contracgrained heavily worked fibrous microstructure, with the greater amount of work in the axial direction. Author 0