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Microtomographic assessment of damage in P91 and E911 steels after long-term creep

Abstract : Two flat hollow cylinders made of martensitic 9 wt.% Cr steels were creep deformed under in-service conditions typical of steam pipes at fossil-fuel fired power plants. Damage in the tubes was assessed through synchrotron X-ray microtomography by evaluating the shape, size and spatial-distribution of voids. The analysis of the size distribution of non-coalesced voids suggested that void growth is controlled by the plasticity constrained diffusional mechanism, a hypothesis verified by micromechanical simulations. A much higher void density was found in steel grade P91 compared to E911.
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https://hal-emse.ccsd.cnrs.fr/emse-01066931
Contributor : Géraldine Fournier-Moulin <>
Submitted on : Friday, September 10, 2021 - 5:04:49 PM
Last modification on : Monday, September 13, 2021 - 10:08:13 AM

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Loïc Renversade, Herbert Ruoff, Karl Maile, Federico Sket, András Borbély. Microtomographic assessment of damage in P91 and E911 steels after long-term creep. International Journal of Materials Research, 2014, 105 (7), pp.621-627. ⟨10.3139/146.111056⟩. ⟨emse-01066931⟩

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