Modelling for Creep Cavitation Damage and Life of Three Metallic Materials
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Authors
Date
2022-01-02
Department
Department of Energy and Mechanical Engineering
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Mcode
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Language
en
Pages
11
Series
Materials at High Temperatures, Volume 39, issue 1, pp. 86-96
Abstract
Metallic structures operating at high temperatures can have creep as a life-limiting mechanism. The limit can arise by nucleation and growth of creep cavities that eventually merge becoming the leading damage of the fracture mechanisms. Understanding and modelling for creep cavitation can therefore help in prediction of structural safety and condition of such structures. The present paper will introduce a new model to predict creep cavitation damage so that the associated creep strain is also modelled out of the predictive expression without losing accuracy in the time to critical damage and corresponding residual life. The model was verified for OFHC copper, low-alloy 0.5CMV steel and higher-alloy X20 steel, to cover a wide range of polycrystalline metals and their microstructures. The new model performed as well as or better than the classical approach which requires access to measured strain. The model was applied to predict creep cavitation damage from time, stress and temperature as predictive variables.Description
Funding Information: The authors wish to acknowledge the financial support of the Academy of Finland, via the EARLY project No. 325108, and Finnish Research Programme on Nuclear Waste Management, via the CRYCO project No. KYT15/2020. Publisher Copyright: © 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
Keywords
cavitation, Creep, damage, life, metal, model
Other note
Citation
Pohja, R, Auerkari, P & Vilaça, P 2022, ' Modelling for Creep Cavitation Damage and Life of Three Metallic Materials ', Materials at High Temperatures, vol. 39, no. 1, pp. 86-96 . https://doi.org/10.1080/09603409.2021.2024420