Accession Number : AD0431588


Title :   TUNGSTEN FORGING DEVELOPMENT PROGRAM.


Descriptive Note : Interim technical progress rept. no. 10, 19 Aug 63-19 Jan 64,


Corporate Author : TRW INC CLEVELAND OHIO


Personal Author(s) : Redlinger,R W


Report Date : Jan 1964


Pagination or Media Count : 37


Abstract : Forging billets obtained from arc melted and extruded, unalloyed tungsten ingots were used to demonstrate the applicability of a scaled-up forging process for producing thin-wall section components. A six-step forging sequence developed earlier in the program was simplified by eliminating one operation. Process reproducibility was determined from dimensional, metallographic and mechanical property data. As-forged thickness and sidewall concentricity measurements showed the variation in these dimensions to be within 0.030-0.040 in. for the design dimensions. Metallographic examination of as-forged sections revealed wrought microstructures similar to those obtained in earlier forgings. Recrystallization of the wrought structure occurred after 1 hour at 2500F. Determination of ductile-brittle transition temperature from tensile test data showed the transition to be at 375F. (Author)


Descriptors :   *FORGING , MATERIAL FORMING , TUNGSTEN , MELTING , ELECTRIC ARCS , EXTRUSION , TRANSITION TEMPERATURE , BRITTLENESS , DUCTILITY , SURFACE PROPERTIES , CHEMICAL ANALYSIS


Distribution Statement : APPROVED FOR PUBLIC RELEASE