Physical Property Changes in Plutonium from Accelerated Aging using Pu-238 Enrichment

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We present changes in volume, immersion density, and tensile properties observed from accelerated aged plutonium alloys. Accelerated alloys (or spiked alloys) are plutonium alloys enriched with approximately 7.5 weight percent of the faster-decaying {sup 238}Pu to accelerate the aging process by approximately 17 times the rate of unaged weapons-grade plutonium. After sixty equivalent years of aging on spiked alloys, the dilatometry shows the samples at 35 C have swelled in volume by 0.15 to 0.17 % and now exhibit a near linear volume increase due to helium in-growth. The immersion density of spiked alloys shows a decrease in density, similar ... continued below

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7 p. (0.2 MB)

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Chung, B W; Choi, B W; Saw, C K; Thompson, S R; Woods, C H; Hopkins, D J et al. December 20, 2006.

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We present changes in volume, immersion density, and tensile properties observed from accelerated aged plutonium alloys. Accelerated alloys (or spiked alloys) are plutonium alloys enriched with approximately 7.5 weight percent of the faster-decaying {sup 238}Pu to accelerate the aging process by approximately 17 times the rate of unaged weapons-grade plutonium. After sixty equivalent years of aging on spiked alloys, the dilatometry shows the samples at 35 C have swelled in volume by 0.15 to 0.17 % and now exhibit a near linear volume increase due to helium in-growth. The immersion density of spiked alloys shows a decrease in density, similar normalized volumetric changes (expansion) for spiked alloys. Tensile tests show increasing yield and engineering ultimate strength as spiked alloys are aged.

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7 p. (0.2 MB)

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PDF-file: 7 pages; size: 0.2 Mbytes

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  • Presented at: Materials Research Society, Boston, United States, Nov 27 - Dec 01, 2006

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  • Report No.: UCRL-PROC-226996
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 902342
  • Archival Resource Key: ark:/67531/metadc890119

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  • December 20, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • April 17, 2017, 12:53 p.m.

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Chung, B W; Choi, B W; Saw, C K; Thompson, S R; Woods, C H; Hopkins, D J et al. Physical Property Changes in Plutonium from Accelerated Aging using Pu-238 Enrichment, article, December 20, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc890119/: accessed June 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.