= Helium embrittlement
Loss of mechanical integrity associated with retained <helium>, including the growth and coalescence of gas-containing cavities at <grain boundaries>. Gas location, trapping, <temperature>, <stress> and the initial <microstructure> influence the result. It can occur in austenitic <steel> without the ferritic <ductile-to-brittle transition>.<High-temperature Embrittlement of Stainless Steel irradiated in Fast Fluxes by A. S. Fraser and others>[Abstract: helium production and boundary-bubble interpretation of high-temperature ductility loss]{ref}
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