DEVELOPMENT OF THORIUM-URANIUM-BASE FUEL ALLOYS

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Thorium-uranium alloys were studied with the aim of developing alloys with improved irradiation behavior by control of microstructure. The effect of thorium purity, melting technique, hot and cold working, and heat treatment on microstructure was investigated. The most signifi- . cant microstructural differences occurred as a result of casting technique, The arc-melted alloys exhibited the most nearly ideal structure, that of a homogeneous dispersion of small-diameter uranium particles in a thorium matrix, In addition, the rate of work hardening, recrystallization behavior, density, and hot hardness of thoriumuranium alloys were determined. As uranium content increases, the rate of work hardening increases, ... continued below

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Pages: 30

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Farkas, M.S.; Bauer, A.A. & Dickerson, R.F. March 18, 1960.

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Description

Thorium-uranium alloys were studied with the aim of developing alloys with improved irradiation behavior by control of microstructure. The effect of thorium purity, melting technique, hot and cold working, and heat treatment on microstructure was investigated. The most signifi- . cant microstructural differences occurred as a result of casting technique, The arc-melted alloys exhibited the most nearly ideal structure, that of a homogeneous dispersion of small-diameter uranium particles in a thorium matrix, In addition, the rate of work hardening, recrystallization behavior, density, and hot hardness of thoriumuranium alloys were determined. As uranium content increases, the rate of work hardening increases, The recrystallization temperature of thorium was found to increase by over 100 deg C when uranium is present. Molybdenum, niobium, zirconium, and zirconium in conjunction with niobium were added to thorium- uranium with the aim of increasing irradiation resistance by stabilizing the gamma-uranium phase and/or improving the hightemperature strength of the alloy. It was found that small additions of molybdenum or niobium were effective in stabliizing the gamma-uranium phase, while zirconium was an effective hardener at temperatures up to 600 deg C, Zirconium additions to thorium-uranium alloys were effective in improving the 300 deg C water corrosion resistance of thorium by a factor of two. (auth)

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Pages: 30

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  • Other Information: Orig. Receipt Date: 31-DEC-60

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  • Report No.: BMI-1428
  • Grant Number: W-7405-ENG-92
  • DOI: 10.2172/4169671 | External Link
  • Office of Scientific & Technical Information Report Number: 4169671
  • Archival Resource Key: ark:/67531/metadc870707

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • March 18, 1960

Added to The UNT Digital Library

  • Sept. 16, 2016, 12:32 a.m.

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  • Nov. 18, 2016, 7:18 p.m.

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Farkas, M.S.; Bauer, A.A. & Dickerson, R.F. DEVELOPMENT OF THORIUM-URANIUM-BASE FUEL ALLOYS, report, March 18, 1960; Columbus, Ohio. (digital.library.unt.edu/ark:/67531/metadc870707/: accessed January 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.