Accession Number : AD0612696

Title :   INVESTIGATION OF THE MECHANICAL CHARACTERISTICS OF ZONE-LEVELED BERYLLIUM.

Descriptive Note : Technical rept. for 1 Jan-30 Sep 64,

Corporate Author : BRUSH BERYLLIUM CO CLEVELAND OHIO

Personal Author(s) : Carrabine,J. A. ; Stonehouse,A. J. ; Fetsko,D. G. ; Beaver,W. W.

Report Date : JAN 1965

Pagination or Media Count : 70

Abstract : Zone-leveling has been shown to produce beryllium single crystals of intermediate purity, having moderately high basal glide capacity, while retaining reasonably high strength. Properties of the zone-leveled crystals are dependent upon zone travel rate, but not upon the number of zone passes. The enhanced basal glide corresponds to an agglomeration of insoluble impurities, and a retention of the soluble elements in solid solution. The process results in some bulk purification, but does not alter significantly the plastic anisotropy of the crystals. Application of the zone-leveling concepts, in a modified manner, to commercial hot-pressed polycrystalline metal has resulted in an improvement in roomtemperature tensile elongation, with only minor strength alterations. The implication of these results is that a refinement of the thermal and chemical parameters involved in the process could possibly lead to a materially improved engineering metal of available purity, thus precluding the high-purity approach. (Author)

Descriptors :   (*ZONE MELTING, BERYLLIUM), (*BERYLLIUM, ZONE MELTING), SINGLE CRYSTALS, MECHANICAL PROPERTIES, IMPURITIES, SILICON, ALUMINUM, TITANIUM, METALLOGRAPHY, MICROSTRUCTURE, OPTICAL ANALYSIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE