Accession Number : AD0803853

Title :   EFFECTS OF THERMAL-MECHANICAL VARIABLES ON THE ANISOTROPY OF FORGED BERYLLIUM.

Descriptive Note : Technical rept. 1 Jul 64-1 Jun 66,

Corporate Author : AUTONETICS ANAHEIM CA

Personal Author(s) : Gross, A. G., Jr. ; Colteryahn, L. E.

Report Date : DEC 1966

Pagination or Media Count : 202

Abstract : The objective of this program was to determine the effect of forging variables on anisotropy in beryllium forgings. A series of combinations of a uniaxial forging reduction (by forward extrusion) followed by a biaxial forging reduction (by upset forging against the extrusion direction) were checked for their effects on anisotropy using fixed conditions of the various temperature variables. This was followed by a series of combinations of forging and stress-relieving temperatures using a fixed forging-reduction sequence. A terminal set of forgings was produced using a practice which was to be optimum based on the preceding experiments. The results were interpreted to draw the conclusions that: (1) biaxial forgings only slightly more anisotropic, on the average, than hot-pressed beryllium can be produced using extrusion ratios ranging from 4 to 7 followed by upset-forging reductions ranging from 45 to 60%; (2) the degree of anisotropy of the average property levels appears to be reproducible for a given set of forging process parameters; (3) individual property-level determinations scatter about the average far more widely in the biaxial forgings than in the hot-pressed beryllium input stock. (Author)

Descriptors :   (*FORGING, BERYLLIUM ALLOYS), (*BERYLLIUM ALLOYS, ANISOTROPY), EXTRUSION, JET ENGINES, TENSILE PROPERTIES, MECHANICAL PROPERTIES, STRESSES, MICROSTRUCTURE, SENSITIVITY, IMPACT TESTS, DENSITY, CALIBRATION, STRAIN(MECHANICS), DUCTILITY, INERTIAL GUIDANCE, REDUCTION.

Subject Categories : Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE