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Modeling of the Tritium Impact on Mechanical Properties of Structural Materials by Radiogenic Helium and Hydrogen Synergetic Effect Technique

I. E. Boitsov, S. K. Grishechkin, S. V. Zlatoustovskiy, A. A. Yukhimchuk

Fusion Science and Technology / Volume 48 / Number 1 / Pages 609-612

July 2005

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The paper presents results of tritium-structural materials interaction modeling by simultaneous exposure to radiogenic helium-3 and hydrogen (both dissolved and external). This method of synergetic effect of radiogenic helium-3 and hydrogen is a radiation-safe technique to study the tritium impact on mechanical properties of structural materials. Applicability of the method is illustrated by technique and research results on the impact of high-pressure hydrogen (80MPa), helium-3 (concentration ~140appm) and their synergetic (hydrogen+3He) effects on mechanical properties of CrNi40MoCuTiAl alloy in temperature range from 20 to 600°C. It has been shown that joint effect of radiogenic helium-3 and hydrogen on mechanical properties of alloy can not be represented as the result of a simple summation of helium and hydrogen embrittlement. Proposed technique of synergetic impact of radiogenic helium-3 and hydrogen allows more correct simulation and investigation in the tritium impact on mechanical properties of materials than individual research in helium or hydrogen embrittlement.

 
 
 
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