Abstract
One user-friendly laboratory investigation method for tellurium-induced intergranular cracking has been preliminarily developed in this study. The Te exposure experiments were carried out using FLiNaK salts with NiF2 and Cr3Te4 at 700 °C in GH3535 alloy tubes. Te exists in the form of intergranular segregation without the formation of surface tellurides, and Te-induced intergranular cracking can occur under unstrained conditions, which agrees with the observations in molten salt reactors. The acceleration effect of NiF2 can be ascribed to its reaction with Cr3Te4 to form Te metal.
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