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Description: In a continuation of the Hanford-Battelle cooperative program, the combined use of the vibrational-compaction and gas-pressure-bonding processes for fabricating UO/sub 2/ fuel elements was studied. Particuliar emphasis was placed on the use of agglomerated micronized UO/sub 2/ to overcome nonuniformities in the vibrationally compacted pressurebonded fuels. Inconel-X-clad fuel rods were gas-pressure bonded at 2100 deg F for 3 hr at 10,000 psi to evaluate the use of micronized UO/sub 2/ agglomerated by cold high-energy-rate forming methods. Fuel densities from 88 to 93% of theoretical were attained. A limited parallel study was also conducted a evaluate hydrostatic pressing as a method of agglomerating micronized UO/sub 2/. Tap density increased from 20 to 25% for the as-received micronized oxide to 41% for the hydrostatically agglomerated plus 200-mesh powder. Studies of the effects of prior cold work and gaspressure bonding on the mechanical and physical properties of types 304L and 347 stainless steel were conducted. Prior cold work in the range of 35 to 50% gave a pressurebonded structure having a fine grain size. (auth)
Date: July 23, 1963
Creator: Hodge, E.S.; Porembka, S.W.; Boyer, C.B. & Diersing, R.J.
Partner: UNT Libraries Government Documents Department

Effect of Solute Atoms Upon Vacancy Climb of Prismatic Dislocations in Al- 5% Mg Alloy

Description: The climb rate of prismatic dislocations in quenched Al-5% Mg Alloy was studied by bulk annealing and also by high-temperature electron microscopy of thin foils, In bulk and thin-foil specimens, loops and helices were always observed to grow. The activation energy was determined to be 0,95 plus or minus 0.05 ev. The results can be interpreted on the basis of a binding energy between vacancies and magnesium atoms which can be x0.1 to 0.4 ev, depending on their geometrical configuration. (auth)
Date: September 1, 1962
Creator: Eikum, A. & Thomas, G.
Partner: UNT Libraries Government Documents Department