Softening and relaxation of GR.91 steel in creep-fatigue conditions

Jaromír Janoušek, Maxime Sauzay, Rami Pohja, Stefan Holmström

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    The data presented here were obtained as part of the European FP7 MatISSE project to model the softening and relaxation behaviour of Grade 91 steel under creep-fatigue loading because this type of thermal loading is a major degradation mechanism in fast reactors. The supporting tests were focused on strain controlled low cycle fatigue tests with different strain amplitudes (ϵ a = 0.45 %, 0.35 % and 0.25 %) and different tension hold times (1 and 12 hours) for temperature 600°C. The results were compared with results for 24 hour hold time from another testing laboratory (VTT). The results were evaluated with respect to the number of cycles, N, and also as a function of the cumulative plastic strain, p(N).

    Original languageEnglish
    Title of host publicationMETAL 2018 - 27th International Conference on Metallurgy and Materials, Conference Proceedings
    Pages536-541
    Number of pages6
    ISBN (Electronic)978-808729484-0
    Publication statusPublished - 2018
    MoE publication typeA4 Article in a conference publication
    Event27th International Conference on Metallurgy and Materials, METAL 2018 - Brno, Czech Republic
    Duration: 23 May 201825 May 2018

    Conference

    Conference27th International Conference on Metallurgy and Materials, METAL 2018
    Country/TerritoryCzech Republic
    CityBrno
    Period23/05/1825/05/18

    Keywords

    • Creep-Fatigue
    • P91
    • Relaxation
    • Softening

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