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ASTM Selected Technical Papers
Effects of Radiation on Materials: 20th International Symposium
By
ST Rosinski
ST Rosinski
1
Symposium Chair and Editor
?
Electric Power Research Institute
?
Charlotte, North Carolina
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ML Grossbeck
ML Grossbeck
editor
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TR Allen
TR Allen
editor
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AS Kumar
AS Kumar
editor
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ISBN-10:
0-8031-2878-9
ISBN:
978-0-8031-2878-1
No. of Pages:
892
Publisher:
ASTM International
Publication date:
2001

Kinetics of phosphorus accumulation on grain boundaries (GB) in iron-based alloys is treated theoretically, taking into account both the radiation-induced segregation (RIS) in the matrix and the Gibbsian adsorption (GA) at GB. For steady-state conditions analytical expressions are derived for component profiles near GB and component concentrations on GB. Modeling of phosphorus accumulation at GB in iron alloys is carried out using two different models: 1) the McLean's model generalized to take into account the radiation-enhanced phosphorus diffusion via vacancy and interstitial mechanisms as well as RIS near GB, 2) a model of RIS in a ternary Fe-P-Ni alloy accounting for the binding energy of phosphorus atoms with interstitials as well as a possibility of high phosphorus content near GB at high irradiation doses. Predictions of modeling are analyzed regarding the dependence on temperature, dose and Fe and P diffusion parameters available for iron alloys. It is shown that the GB phosphorus concentration calculated as a function of temperature reveals one or two maxima depending on dose and the choice of material parameters.

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,
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,
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,
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11.
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15.
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, Vol.
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16.
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,”
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17.
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18.
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19.
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20.
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,”
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, Vol.
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American Society for Testing and Materials
,
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,
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26.
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,
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,
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27.
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, “
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,”
Materials Science Forum
 0255-5476, Vol.
294–296
,
1999
, pp. 67–74.
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