QUARTERLY METALLURGICAL PROGRESS REPORT NO. 20, JULY 1-SEPTEMBER 30, 1963

Technical Report · Sat Oct 31 04:00:00 EST 1964

OSTI ID:4142933

Stainless steel-gadolinium alloys were prepared and tested for mechanical strengih and resistance to oxidation and hot-water corrosion. Data show that yield or ultimate tensile strengths were relatively unaffected by increases in gadolinium content. However, with increasing gadolinium, degradation of ductility and impact behaviors were observed. Oxidation and corrosion tests were characterized by weight gains with increasing gadolinium contents. Investigation of the samarium-magnesium system was concluded. Reactivity studies of hafnium carbide in air, up to alloy system was almost completed. Macro-cracks have plagued the hafnium carbide casting work. The investigation of three thorium-alloy systems thorium-holmium, thorium-neodymium, and thorium-praseodymium, was initiated. Oxygen may be removed from zirconium by the addition of small amounts of Ti, Dy, Er, Gd, and Sm and maintaining the mixture in a molten state for one hour. Oxygen is reduced from 1600 ppm to about 700 ppm. Fabrication of uranium nitride by melting and casting is evaluated. Physical property study of uranium carbideuranium nitride compositions was initiated. Conditions which determine the optimum cooling of water-cooled copper melting crucibles were determined. Equipment is being modified to permit a study of film coefficients between the molten metal and the crucible wall. Arrangements were made to obtain 50 pounds of rhenium powder to initiate the study of tungsten-25% rhenium alloy for eventual conversion to tubing. Preliminary small-scale melting studies have begun. (auth)

• Research Organization: Bureau of Mines. Albany Metallurgy Research Center, Ore.
• NSA Number: NSA-18-002174
• OSTI ID: 4142933
• Report Number(s): USBM-U-1082
• Country of Publication: United States
• Language: English

Related Subjects

AIR
BOILING
CASTING
CHEMICAL REACTIONS
COOLING
COPPER
CORROSION
CRACKS
CRUCIBLES
DYSPROSIUM
ERBIUM
FABRICATION
FILMS
GADOLINIUM
GADOLINIUM ALLOYS
HAFNIUM ALLOYS
HAFNIUM CARBIDES
HIGH TEMPERATURE
HOLMIUM COMPOUNDS
IRIDIUM ALLOYS
LIQUID METALS
MAGNESIUM COMPOUNDS
MATERIALS TESTING
MECHANICAL PROPERTIES
MELTING
METALS, CERAMICS, AND OTHER MATERIALS
NEODYMIUM ALLOYS
OXIDATION
PHASE DIAGRAMS
POWDERS
PRASEODYMIUM COMPOUNDS
PREPARATION
QUANTITATIVE ANALYSIS
QUANTITY RATIO
REDUCTION
RHENIUM
RHENIUM ALLOYS
SAMARIUM
SAMARIUM COMPOUNDS
STABILITY
STAINLESS STEELS
TENSILE PROPERTIES
THORIUM ALLOYS
THORIUM COMPOUNDS
TITANIUM
TRACE AMOUNTS
TUBES
TUN