GRAIN REFINEMENT OF CAST URANIUM BY HEAT TREATMENT

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The thermal cycling, irradiation behavior, and fabrication characteristics of U are strongly dependent upon grain size; a smaller grain size yields the better properties. Grain refinement of cast U may be accomplished either by hot working in the high alpha temperature range or by heat treatment; refinement by the latter method was the object of this investigation. The variables studied were time, temperature, specimen size, multiple quenching, and alphaannealing after quenching. The results of the investigation have led to the following conclusions, within the scope of the experimental conditions. The grain size of cast U may be appreciably refined by ... continued below

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Pages: 29

Creation Information

Powell, G.W.; Klein, J.L. & Krashes, D. July 1, 1957.

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Description

The thermal cycling, irradiation behavior, and fabrication characteristics of U are strongly dependent upon grain size; a smaller grain size yields the better properties. Grain refinement of cast U may be accomplished either by hot working in the high alpha temperature range or by heat treatment; refinement by the latter method was the object of this investigation. The variables studied were time, temperature, specimen size, multiple quenching, and alphaannealing after quenching. The results of the investigation have led to the following conclusions, within the scope of the experimental conditions. The grain size of cast U may be appreciably refined by beta-quenching. Time and temperature in the beta phase are not significant in determining the final alpha grain size. Multiple beta-quenches (two to four times) produce better grain size refinement than a single quench. Alpha-annealing after beta-quenching causes recrystallization, but does not greatly affect the grain size. Gamma-quenching is not recommended as a practical heat treatment. (auth)

Physical Description

Pages: 29

Notes

NTIS

Source

  • Other Information: Decl. Mar. 16, 1960. Orig. Receipt Date: 31-DEC-60

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  • Report No.: NMI-1180
  • Grant Number: AT(30-1)-1565
  • DOI: 10.2172/4168647 | External Link
  • Office of Scientific & Technical Information Report Number: 4168647
  • Archival Resource Key: ark:/67531/metadc864415

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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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Creation Date

  • July 1, 1957

Added to The UNT Digital Library

  • Sept. 16, 2016, 12:32 a.m.

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  • Nov. 28, 2016, 6:56 p.m.

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Powell, G.W.; Klein, J.L. & Krashes, D. GRAIN REFINEMENT OF CAST URANIUM BY HEAT TREATMENT, report, July 1, 1957; United States. (digital.library.unt.edu/ark:/67531/metadc864415/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.