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Cleaning of aluminum alloy 5083. [For welding]

Description: The purpose of this investigation was to evaluate several different cleaning procedures on welds with very low heat inputs. The study evaluated the Oak Ridge Y-12 Plant's chemical cleaning, another type of chemical cleaning, ion cleaning, and diamond-machined cleaning. The results showed that the diamond-machining process provides better weld joint surfaces and sound welds with minimum oxide inclusion and porosity.
Date: June 5, 1986
Creator: Koger, J.W. (comp.)
Partner: UNT Libraries Government Documents Department
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Corrosion testing type HP 9-4-20-steel

Description: Forged HP 9-4-20 steel exhibits a high yield strength (1240 MPa (180 ksi)), a high fracture toughness (K/sub Ic/) (120 MN/m/sup 3/2/ (110 ksi ..sqrt..in)), in good weldability. The alloy was studied to determine some of its corrosion and stress-corrosion characteristics, especially after welding. Potentiodynamic-polarization studies established that pitting of the steel was most severe when the chloride ion concentration was high and the pH of the solution was low. Higher potentials (approachin… more
Date: February 20, 1979
Creator: Dobbins, A. G.; Koger, J. W. & Mustaleski, Jr., T. M.
Partner: UNT Libraries Government Documents Department
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Fracture characteristics of uranium alloys by scanning electron microscopy

Description: The fracture characteristics of uranium alloys were determined by scanning electron microscopy. The fracture mode of stress-corrosion cracking (SCC) of uranium-7.5 weight percent niobium-2.5 weight percent zirconium (Mulberry) alloy, uranium--niobium alloys, and uranium--molybdenum alloys in aqueous chloride solutions is intergranular. The SCC fracture surface of the Mulberry alloy is characterized by very clean and smooth grain facets. The tensile-overload fracture surfaces of these alloys are… more
Date: October 1, 1976
Creator: Koger, J. W. & Bennett, Jr., R. K.
Partner: UNT Libraries Government Documents Department
open access

Effect of aging on the general corrosion and stress corrosion cracking of uranium--6 wt % niobium alloy

Description: Mechanical properties of the uranium-6 wt percent niobium alloy change with aging time and temperature. In general, the ultimate tensile strength and hardness reach a peak, while elongation becomes a minimum at aging temperatures between 400 and 500$sup 0$C. The first optical evidence of a second phase was in the 400$sup 0$C-aged alloy, while complete transformation to a two-phase structure was seen in the 600$sup 0$C-aged alloy. The maximum-strength conditions correlate with the minimum stress… more
Date: November 1, 1975
Creator: Koger, J. W.; Ammons, A. M. & Ferguson, J. E.
Partner: UNT Libraries Government Documents Department
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