Accession Number:

AD0600520

Title:

DEVELOPMENT OF IMPROVED FABRICATION METHODS, PROCESSES, AND TECHNIQUES FOR PRODUCING TYPICAL AIRCRAFT SHAPES FROM BERYLLIUM.

Descriptive Note:

Final technical documentary rept., 15 July 6230 Nov 63,

Corporate Author:

NUCLEAR METALS DIV TEXTRON INC WEST CONCORD MASS

Report Date:

1964-05-29

Pagination or Media Count:

137.0

Abstract:

A basic procedure has been developed for warm drawing long lengths of a complex beryllium structural shape to accurate dimensions. The starting shape was a U-channel extrusion having a 1-12 inch wide web, 1 inch high flanges, and a thickness of flange and web of 60 to 100 mils. Draw reductions of up to 16 percent were obtained in a single pass, and reductions of up to 39 percent were obtained by multiple draws. The maximum length drawn was approximately 10 feet. Large increases in longitudinal and transverse strength properties at room temperature and at -100 F are obtained by drawing at 800 F on the average the increase in yield strength is approximately 2500 psi per one percent drawing reduction. However, drawing reduces the ductility for example, the longitudinal room temperature ductility of approximately 6 percent is reduced to approximately 2 percent by a 14 percent draw reduction. Annealing after drawing reduces the strength but does not restore the ductility. Both strength and ductility are higher in the longitudinal direction than the transverse direction. The preferred orientation of the basal planes caused by extrusion is not changed appreciably by drawing. See also AD-299 006 Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE