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Radiation-Induced Segregation

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Fundamentals of Radiation Materials Science

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Abstract

A profound consequence of irradiation at elevated temperature is the spatial redistribution of solute and impurity elements in the metal. This phenomenon leads to the enrichment or depletion of alloying elements in regions near surfaces, dislocations, voids, grain boundaries, and phase boundaries. Figure 6.1 shows a plot of solute element profiles across a grain boundary in stainless steel irradiated in a reactor to a dose of several dpa at about 300 °C. There is significant depletion of chromium, molybdenum, and iron and enrichment of nickel and silicon. Such drastic changes at the grain boundary will cause changes in the local properties of the solid and may induce susceptibility to a host of processes that can degrade the integrity of the component. For this reason, understanding radiation-induced segregation (RIS) is of great importance for reactor performance.

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Authors and Affiliations

  1. Department of Nuclear Engineering and Radiological Sciences, University of Michigan, 1921 Cooley Bldg., 2355 Bonisteel Blvd., Ann Arbor, MI, 48109-2104, USA

    Gary S. Was

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  1. Gary S. Was
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Correspondence to Gary S. Was .

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Was, G.S. (2017). Radiation-Induced Segregation. In: Fundamentals of Radiation Materials Science. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-3438-6_6

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  • DOI: https://doi.org/10.1007/978-1-4939-3438-6_6

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  • Print ISBN: 978-1-4939-3436-2

  • Online ISBN: 978-1-4939-3438-6

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