A robust model for creep-fatigue life assessment

Stefan Holmström (Corresponding Author), Pertti Auerkari

    Research output: Contribution to journal › Article › Scientific › peer-review

    12 Citations (Scopus)

    Abstract

    High temperature components subjected to long term cyclic operation will acquire life-limiting damage from both creep and fatigue. A new robust model for creep-fatigue life assessment is proposed with a minimal set of fitting constants, and without the need to separate creep and fatigue damage or life fractions. The model is based on the creep rupture behaviour of the material with a fatigue correction described by hold time (in tension) and total strain range at temperature. The model is shown to predict the observed creep-fatigue life of ferritic steel P91, austenitic steel 316FR, and Ni alloy A230 with a scatter band close to a factor of 2.
    Original languageEnglish
    Pages (from-to)333-335
    Number of pages3
    JournalMaterials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
    Volume559
    Issue number1
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    fatigue life
    Creep
    Fatigue of materials
    steels
    damage
    Austenitic steel
    Ferritic steel
    Fatigue damage
    Temperature
    temperature

    Keywords

    • Creep
    • creep-fatigue
    • life
    • Ni alloy
    • steel

    Cite this

    Holmström, Stefan ; Auerkari, Pertti. / A robust model for creep-fatigue life assessment. In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing. 2013 ; Vol. 559, No. 1. pp. 333-335.
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    abstract = "High temperature components subjected to long term cyclic operation will acquire life-limiting damage from both creep and fatigue. A new robust model for creep-fatigue life assessment is proposed with a minimal set of fitting constants, and without the need to separate creep and fatigue damage or life fractions. The model is based on the creep rupture behaviour of the material with a fatigue correction described by hold time (in tension) and total strain range at temperature. The model is shown to predict the observed creep-fatigue life of ferritic steel P91, austenitic steel 316FR, and Ni alloy A230 with a scatter band close to a factor of 2.",
    keywords = "Creep, creep-fatigue, life, Ni alloy, steel",
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    Holmström, S & Auerkari, P 2013, 'A robust model for creep-fatigue life assessment', Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, vol. 559, no. 1, pp. 333-335. https://doi.org/10.1016/j.msea.2012.08.107

    A robust model for creep-fatigue life assessment. / Holmström, Stefan (Corresponding Author); Auerkari, Pertti.

    In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 559, No. 1, 2013, p. 333-335.

    Research output: Contribution to journal › Article › Scientific › peer-review

    TY - JOUR

    T1 - A robust model for creep-fatigue life assessment

    AU - Holmström, Stefan

    AU - Auerkari, Pertti

    PY - 2013

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    N2 - High temperature components subjected to long term cyclic operation will acquire life-limiting damage from both creep and fatigue. A new robust model for creep-fatigue life assessment is proposed with a minimal set of fitting constants, and without the need to separate creep and fatigue damage or life fractions. The model is based on the creep rupture behaviour of the material with a fatigue correction described by hold time (in tension) and total strain range at temperature. The model is shown to predict the observed creep-fatigue life of ferritic steel P91, austenitic steel 316FR, and Ni alloy A230 with a scatter band close to a factor of 2.

    AB - High temperature components subjected to long term cyclic operation will acquire life-limiting damage from both creep and fatigue. A new robust model for creep-fatigue life assessment is proposed with a minimal set of fitting constants, and without the need to separate creep and fatigue damage or life fractions. The model is based on the creep rupture behaviour of the material with a fatigue correction described by hold time (in tension) and total strain range at temperature. The model is shown to predict the observed creep-fatigue life of ferritic steel P91, austenitic steel 316FR, and Ni alloy A230 with a scatter band close to a factor of 2.

    KW - Creep

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    KW - Ni alloy

    KW - steel

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    DO - 10.1016/j.msea.2012.08.107

    M3 - Article

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    EP - 335

    JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

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    Holmström S, Auerkari P. A robust model for creep-fatigue life assessment. Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing. 2013;559(1):333-335. https://doi.org/10.1016/j.msea.2012.08.107

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