Abstract: A method of making a tungsten tantalum material comprising generally 80 percent by weight tungsten and 20 percent by weight tantalum and forming the material into a high strength full density round bar, which can be utilized in a high velocity armor penetrator.

Abstract: Ceramic articles having improved fracture toughness are prepared by ion bombardment of ceramic particles by gas ions to impregnate the particles, cold compacting the gas ion-containing ceramic particles into a form, and hot pressing the gas ion-containing ceramic particle form into a ceramic article whereby gas bubbles are formed in and substantially homogeneously dispersed throughout the ceramic article.

Abstract: An essentially gamma-prime precipitation-hardened iron-chromium-nickel alloy has been designed with emphasis on minimum nickel and chromium contents to reduce the swelling tendencies of these alloys when used in liquid metal fast breeder reactors. The precipitation-hardening components have been designed for phase stability and such residual elements as silicon and boron, also have been selected to minimize swelling. Using the properties of these alloys in one design would result in an increased breeding ratio over 20% cold worked stainless steel, a reference material, of 1.239 to 1.310 and a reduced doubling time from 15.8 to 11.4 years.The gross stoichiometry of the alloying composition comprises from about 0.04% to about 0.06% carbon, from about 0.05% to about 1.0% silicon, up to about 0.1% zirconium, up to about 0.5% vanadium, from about 24% to about 31% nickel, from 8% to about 11% chromium, from about 1.7% to about 3.5% titanium, from about 1.0% to about 1.8% aluminum, from about 0.9% to about 3.