EFFECTS OF IRRADIATION OF SOME URANIUM-PLUTONIUM ALLOYS. Final Report-- Metallurgy Program 6.5.3 Work Completed: March 1955

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Irradiations were made on a number of uranium-plutonium alloy specimens made from both cast and extruded materials. The cast alloys included alloys of uranium with 3.7, 5.6, and 13.0 wt. % plutonium, and the extruded alloys included alloys of uranium with 9.5, 14.1, and 15.7 wt.% plutonium. One-half of the extruded specimens were given a heat treatment consisting of heating to 545 deg C and cooling to and holding at 500 deg C for one hour in an attempt to remove the preferred orientation that was anticipated from extrusion. The specimens were irradiated to burnups ranging up to 0.54 at. ... continued below

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Pages: 23

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Kittel, J.H. & Kelman, L.R. January 1, 1958.

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Irradiations were made on a number of uranium-plutonium alloy specimens made from both cast and extruded materials. The cast alloys included alloys of uranium with 3.7, 5.6, and 13.0 wt. % plutonium, and the extruded alloys included alloys of uranium with 9.5, 14.1, and 15.7 wt.% plutonium. One-half of the extruded specimens were given a heat treatment consisting of heating to 545 deg C and cooling to and holding at 500 deg C for one hour in an attempt to remove the preferred orientation that was anticipated from extrusion. The specimens were irradiated to burnups ranging up to 0.54 at. % with central temperatures ranging up to 490 deg C. The cast specimens were all found to have developed severe surface roughening as a result of the irradiation they received, presumably because of excessively large grain sizes present before irradiation. Identically fabricated unalloyed uranium specimens showed similar behavior. The as-extruded alloy specimens maintained good surface smoothness under irradiation, but showed elongations which were dependent on plutonium content. For example, in samples with 0.4 at.% burnup, a 14.1 wt.% plutonium alloy specimen elongated 96%, whereas an 18.7 wt. % plutonium alloy specimen elongated only 5.4%. The heat-treated extruded specimens did not elongate anisotropically, indicating that the heat treatment used was effective in randomizing the grain orientation. However, the heat-treated specimens developed excessive surface roughening, apparently because the heat treatment caused an undesirably large grain size. (auth)

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Pages: 23

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

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  • Report No.: ANL-5706
  • Grant Number: W-31-109-ENG-38
  • DOI: 10.2172/4300801 | External Link
  • Office of Scientific & Technical Information Report Number: 4300801
  • Archival Resource Key: ark:/67531/metadc1022983

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  • January 1, 1958

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  • Oct. 15, 2017, 10:09 p.m.

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  • Oct. 30, 2017, 4:01 p.m.

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Kittel, J.H. & Kelman, L.R. EFFECTS OF IRRADIATION OF SOME URANIUM-PLUTONIUM ALLOYS. Final Report-- Metallurgy Program 6.5.3 Work Completed: March 1955, report, January 1, 1958; Lemont, Illinois. (digital.library.unt.edu/ark:/67531/metadc1022983/: accessed September 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.