SEMI-ANNUAL SUMMARY RESEARCH REPORT IN METALLURGY FOR JANUARY-JUNE 1957
Study of the equilibrium phases which exist in Mg-rich alloys of the Mg-- U--Th system was continued. The precipitation of thorium as thorium dihydride from thorium-magnesium solutions was investigated over the temperature range 665 to 810 deg C. Soft, ductile niobium metal can be prepared by mixing essentially stoichiometric quantities of Nb/sub 2/O/sub 5/ and carbon, but slight deviation from stoichiometry yielded metal which was hard and non-ductile. The Zn vapor pressures over a number of Zn--Zr alloys were measured, and the results are summarized. An investigation of the U--Cr alloys was undertaken to establish the phase diagram and to determine the degree of ductility of some of the intermediate compositions. Alloys containing additions of small amounts of yttrium to tantalum, niobium, molybdenum, titanium, vanadium and zirconium were continued in corrosion tests. The structure of the alpha -phase compound in the V--Aa alloy was determined. The heat capacity of sodium tungsten bronze (Na/sub x/WO/sub 3/) was measured over the temperature range 1.8 to 4.2 deg K for various concentrations of sodium. Measurements of the elastic constants of single crystals of metallic Be as a function of temperature are in progress. Tensile tests were carried out on standard 0.252 m. diameter tensile specimens prepared from bomb-reduced vanadium. An investigation of the fabrication properties of yttrium metal was initiated to determine the cold working characteristic of the metal and of the effect of impurities upon this property. (For preceding period see ISC-835.) (W.L.H.)
- Research Organization:
- Ames Lab., Ames, IA (United States)
- DOE Contract Number:
- W-7405-ENG-82
- NSA Number:
- NSA-12-007839
- OSTI ID:
- 4326363
- Report Number(s):
- ISC-903
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-58
- Country of Publication:
- United States
- Language:
- English
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SEMI-ANNUAL SUMMARY RESEARCH REPORT IN METALLURGY FOR JULY-DECEMBER 1957
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Related Subjects
BERYLLIUM
BOMB REDUCTION
CARBON
CHROMIUM ALLOYS
COLD WORKING
CORROSION
DUCTILITY
ELASTICITY
FABRICATION
HARDNESS
HIGH TEMPERATURE
IMPURITIES
MAGNESIUM ALLOYS
MATERIALS TESTING
MEASURED VALUES
MECHANICAL PROPERTIES
MIXING
MOLYBDENUM ALLOYS
MONOCRYSTALS
NIOBIUM
NIOBIUM OXIDES
OXIDES
PHASE DIAGRAMS
PRECIPITATION
PREPARATION
PRESSURE
QUALITATIVE ANALYSIS
QUANTITY RATIO
REACTION KINETICS
REDUCTION
SODIUM ALLOYS
SOLUTIONS
SPECIFIC HEAT
TEMPERATURE
TENSILE PROPERTIES
THORIUM ALLOYS
THORIUM HYDRIDES
TITANIUM ALLOYS
TUNGSTEN ALLOYS
URANIUM ALLOYS
VANADIUM ALLOYS
VAPORS
YTTRIUM ALLOYS
ZINC
ZINC ALLOYS
ZIRCON