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THE TENSILE STRENGTH OF SOLID-STATE BONDED ALUMINUM AND NICKEL-PLATED URANIUM

Description: To aid in the evaluation of solid-state bending techniques for cladding natural-uranium fuel-element cores with aluminum, tensile specimens, 1/4 in. in diameter and 3 in. long were made and tested. Results show that these techniques are capable of producing satisfactory bonds between aluminum and nickel-plated uranium. Pressing conditions of 1 min at 950F and 6000 psi produced consintent bond strengths equal to the yield strength of 25 aluminum. When optimum bonding conditions are used, anodic activation and strike-current density are not critical to bond strength. Nickel plating of the aluminum component of the bond couple reduced the tensile strength by about 50%. (auth)
Date: October 21, 1954
Creator: Saller, H.A.; Dickerson, R.F. & Carlson, R.J.
Partner: UNT Libraries Government Documents Department

THE PROPERTIES OF URANIUM CONTAINING MINOR ADDITIONS OF ALUMINUM OR ZIRCONIUM

Description: The tensile properties, hot hardness, and heattreatment characteristics of urarnium alloys containing up to 2.9 at.% aluminum or 4.0 at.% zirconium are described. The data shown that zirconium has a favorable effect upon the grain size, hardness, and tensile strength of uranium without materially affecting ductility. Additions of 3.8 at. % zirconium raised the tensile strength of uranium at room temperature fiom about 100,000 psi to about 200,000 psi, while the elongation in 2 in. increased from 14 to 22% and the grain size decreased from about 0.20 mm to less than O.01 mm. The data show that aluminum raises the yield strength, that it has very little effect on either the grain size, hardness, or tensile strength of uranium, and that it decreases ductility. The addition of 2.6 at.% aluminum decreased ihe roomtemperature ductility of ur-anium from l4 to 4%. (auth)
Date: July 16, 1956
Creator: Saller, H.A.; Rough, F.A. & Chubb, W.
Partner: UNT Libraries Government Documents Department

GRAIN REFINEMENT OF URANIUM BY ALLOYING

Description: Binary alloys of uranium with 38 elements in the range 0.01 to 1.0 at.% were made. Three alloys havirg nominal compositions of 0.01, 0.1, and 1.0 at.% were made with most of the elements, and in addition, 12 ternary and quaternary alloys were made. The alloys were cast, rolled to 7/8-inch-diameter bars, heat treated, and examined for grain size. (auth)
Date: June 1, 1951
Creator: Saller, H.A.; Keeler, J.R. & Eddy, N.S.
Partner: UNT Libraries Government Documents Department

Hydrogen Embrittlement of Zirconium

Description: The amount of hydrogen normally present in zirconium and zirconium alloys suffices to reduce their ductility greatly in an impact test at room temperature, after slow cooling from 6OO deg F. Quenching from 6OO deg F or above gives high impact strength, as does removal of hydrogen by hightemperature vacuum aanealing. The evidence on hydrogen embrittlement, the diffusion, solid solubility, and equilbrium pressure of hydrogen in zirconium the microstructure, and the effects of hydrogen and heat treatment on the mechanical properties of zirconium are discussed. (auth)
Date: August 22, 1952
Creator: Dayton, R.W.; Schwope, A.D.; Muehlenkamp, G.T.; Saller, H.A.; Dickerson, R.F.; Schwartz, C.M. et al.
Partner: UNT Libraries Government Documents Department