FABRICATION OF BERYLLIUM FINE WIRE. Final Report. Technical Report 200- 228

Technical Report · Sat Apr 01 04:00:00 EST 1961

OSTI ID:4814907

Gross, Jr, A G; O'Rourke, R G; Beaver, W W

Techniques were developed for the fabrication of beryllium (S-200B) fine wire and to establish optimum mechanical properties. Various lubricants and drawing temperatures were evaluated. Certain metal-sulfur compounds in conjunction with graphite were found to be the best solid-film combinations. An oil was found which would lubricate at temperatures up to 600 deg F in room atmosphere. Wire diameters as small as 0.00477 inch were produced with each lubrication system. Reductions in area as high as 99.41% without intermediate stress relief were made at 800 deg F, using the solid-film lubrication. A pickling technique was found which enhanced the bending properties of beryllium wire. The bend testing showed beryllium wire of commercial chemical purity to be ductile so long as the applied stress was rotationally asymmetrical about the wire axis. Tensile testing revealed that strength levels in the vicinity of 200,000 psi were attainable and that tensile strength was a function of reduction ratio from the last anneal and of a drawn diameter but was not a function of pickled diameter. An appreciable amount of twinning, {1012}, was produced as a result of drawing and these twins were not always destroyed by heat treatment. Little or no random recrystallization was produced by the annealing treatmeitts employed. (auth)

• Research Organization: Brush Beryllium Co., Cleveland
• NSA Number: NSA-16-009170
• OSTI ID: 4814907
• Report Number(s): NP-11238
• Country of Publication: United States
• Language: English

Related Subjects

ANNEALING
BERYLLIUM
COMPOUNDS
DEFORMATION
FABRICATION
FILMS
GRAPHITE
HEAT TREATMENTS
IMPURITIES
LATTICES
LUBRICATION
MATERIALS TESTING
MECHANICAL PROPERTIES
METALS
METALS, CERAMICS, AND OTHER MATERIALS
OILS
RECRYSTALLIZATION
STRESSES
SULFIDES
TEMPERATURE
THICKNESS
TWINNING
WIRES