Insights into the degradation behavior of T91 steel under the coupled influence of creep-fatigue and lead-bismuth eutectic at 550 °C：The critical role of intergranular damage

2026-07-27

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Jibo Tan *

Xinqiang Wu

Zhaoming Zhang

Ke Wei

DOI：10.1016/j.corsci.2026.114143

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• The creep-fatigue life of T91 steel in LBE decreases with increasing hold time. • Longer hold times accelerated oxidation and Pb-Bi penetration along grain boundaries. • Stress promoted the microstructural evolution and damage at the oxidation front. • Pb-Bi promoted crack branching along high-angle grain boundaries.

Insights into the degradation behavior of T91 steel under the coupled influence of creep-fatigue and lead-bismuth eutectic at 550 °C：The critical role of intergranular damage

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