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):

Report Date:

1964-01-01

Pagination or Media Count:

37.0

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE