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MRS Online Proceedings Library (OPL) MRS Online Proceedings Library (OPL)

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Evolution of Static Physical Properties in Plutonium by Self-irradiation Damage

Published online by Cambridge University Press:  01 February 2011

Brandon W Chung ,
Kenneth Lema  and
David Hiromoto
Brandon W Chung
Affiliation:
chung7@llnl.gov, Lawrence Livermore National Laboratory, Livermore, California, United States
Kenneth Lema
Affiliation:
lema1@llnl.gov, Lawrence Livermore National Laboratory, Livermore, California, United States
David Hiromoto
Affiliation:
hiromoto1@llnl.gov, Lawrence Livermore National Laboratory, Livermore, California, United States
Corresponding
E-mail address:
chung7@llnl.gov
lema1@llnl.gov
hiromoto1@llnl.gov
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Abstract

The alpha-decay of plutonium leads to the age-related change in physical properties. This paper presents updated results of age-related effects on enriched and reference alloys measured from immersion density, dilatometry, and mechanical tests. After nearly 100 equivalent years of aging, both the immersion density and dilatometry show that the enriched alloys are decreasing in density by less than 0.002% per year and now exhibit a near linear density decrease, without void swelling. The tensile tests show that the aging process increases the strength of plutonium alloys, followed by possible saturation past 70 equivalent years of age. The ultimate goal of this work is to develop capabilities to predict physical properties changed by aging effects.

Keywords

Pu actinide radiation effects
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1264: Symposia Z/BB – Basic Actinide Science and Materials for Nuclear Applications , 2010 , 1264-Z08-10
Copyright
Copyright © Materials Research Society 2010

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References

1 Wolfer, W. G., “Radiation effects in plutonium. What is known? Where should we go from here,” in Los Alamos Science, eds. Cooper, N. G., (Los Alamos National Laboratory: Los Alamos, 2000, v26) pp 274–285.Google Scholar
2 Hecker, S. S. and Martz, J. C., “Aging of Plutonium and its alloys,” in Los Alamos Science, eds. Cooper, N. G., (Los Alamos National Laboratory: Los Alamos, 2000, v26) pp 238–243.Google Scholar
3 Chung, B. W., Thompson, S. R., Woods, C. H., Hopkins, D. J., Gourdin, W. H., and Ebbinghaus, B. B., J. Nucl. Mater., 335 142–149 (2006).CrossRefGoogle Scholar
4 Bowen, H. A. and Schoonover, R. M., J. of Res. Nat. Bur. Stand. – C, 71C [3] 179–198 (1967).Google Scholar

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