Tungsten Alloy Fabrication of Penetrator Materials.

摘要

Tungsten heavy alloy bars 1.35 inches in diameter were prepared and evaluated for uniformity of properties. Alloys contained 97.1% to 97.3% tungsten with primary emphasis on the 97.1W-1.6Ni-0.7Fe-0.5Cu-0.1Co composition. To achieve high uniform densities with this alloy, it was necessary to use fine tungsten powder (approx 1-1.5 micrometers) and slow heating rates between 1000 C and the sintering temperature. This was not necessary with similar alloys containing no copper. Tensile elongation was found to be strongly dependent on oxygen levels in the sintered bars. Low oxygen levels gave the best results with 16-17% elongation when oxygen levels were below 6 ppm. These very low oxygen levels were only achieved with alloys containing no copper. (Author)