Accession Number : AD0871476

Title :   The Influence of Grain Refinement and Titanium Alloying Additions on the Mechanical Properties of Beryllium Ingot Sheet.

Descriptive Note : Rept. for Sep 68-Dec 69,

Corporate Author : KAWECKI BERYLCO INDUSTRIES INC READING PA

Personal Author(s) : Taylor, W.

Report Date : DEC 1969

Pagination or Media Count : 155

Abstract : Beryllium ingot sheets having grain sizes as low as 8 microns were made by pack rolling and pack extrusion techniques. Tensile and three point bend properties of these sheets were compared with warm-rolled monolithic ingot sheet. Clear improvements in tensile properties were achieved (65 ksi UTS, 40 ksi Y.S., 23% elongation) in fully recrystallized material, but these improvements were made at the expense of formability. The pack extrusion technique showed promise in achieving grain refinement while restraining texture development. Sheet was also produced from a Be-1% Ti alloy. The alloy demonstrated marked grain refinement compared to unalloyed ingot beryllium; this led to improved tensile properties, but reduced formability was again observed. The ability of titanium beryllide particles to impede dislocation movement was demonstrated, but particle sizes and distributions suitable for dispersion strengthening were not achieved in spite of considerable hot and warm working of the alloy. (Author)

Descriptors :   (*BERYLLIUM, GRAIN SIZE), (*BERYLLIUM ALLOYS, SHEETS), ROLLING(METALLURGY), HEAT TREATMENT, TITANIUM ALLOYS, MICROSTRUCTURE, TENSILE PROPERTIES.

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE