SEMI-ANNUAL SUMMARY RESEARCH REPORT IN METALLURGY FOR JANUARY-JUNE 1957

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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 ... continued below

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Pages: 57

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Creator: Unknown. December 20, 1957.

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Description

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.)

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Pages: 57

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  • Other Information: Orig. Receipt Date: 31-DEC-58

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  • Report No.: ISC-903
  • Grant Number: W-7405-ENG-82
  • DOI: 10.2172/4326363 | External Link
  • Office of Scientific & Technical Information Report Number: 4326363
  • Archival Resource Key: ark:/67531/metadc1021307

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  • December 20, 1957

Added to The UNT Digital Library

  • Oct. 15, 2017, 10:09 p.m.

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  • Oct. 26, 2017, 7:47 p.m.

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SEMI-ANNUAL SUMMARY RESEARCH REPORT IN METALLURGY FOR JANUARY-JUNE 1957, report, December 20, 1957; Ames, Iowa. (digital.library.unt.edu/ark:/67531/metadc1021307/: accessed June 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.