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    Revised Proposal of Fatigue Life Correction Factor Fen for Carbon and Low Alloy Steels in LWR Water Environments

    Source: Journal of Pressure Vessel Technology:;2004:;volume( 126 ):;issue: 004::page 438
    Author:
    Makoto Higuchi
    DOI: 10.1115/1.1767860
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The fatigue life of carbon and low alloy steels decreases with reduction in strain rate in high temperature water such as in the case of a light water reactor coolant. The fatigue life reduction also depends on temperature and dissolved oxygen. The fatigue life correction factor Fen has been proposed as a method to assess the fatigue life reduction in such environments. Three different models for calculating Fen for carbon and low alloy steels have been proposed by Higuchi et al., Chopra et al., and Mehta. These models were compared using considerable environmental fatigue data that were tested and published in Japan and USA and piled up in the database “JNUFAD” by the author. These models give somewhat different results in the specific conditions and a revised model for calculating Fen is thus proposed by remedying the particular drawbacks of each. In this model, the same formula is used for carbon and low alloy steels and S*,T*,O*, and ε̇* are adopted in the formula after reevaluating every parameter. The revised proposal shows better correlation with the test data than the previous models.
    keyword(s): Alloys , Steel , Carbon , Fatigue life , Water , Light water reactors , Fatigue , Temperature AND Oxygen ,
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      Revised Proposal of Fatigue Life Correction Factor Fen for Carbon and Low Alloy Steels in LWR Water Environments

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    http://yetl.yabesh.ir/yetl1/handle/yetl/130654
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    contributor authorMakoto Higuchi
    date accessioned2017-05-09T00:14:06Z
    date available2017-05-09T00:14:06Z
    date copyrightNovember, 2004
    date issued2004
    identifier issn0094-9930
    identifier otherJPVTAS-28446#438_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/130654
    description abstractThe fatigue life of carbon and low alloy steels decreases with reduction in strain rate in high temperature water such as in the case of a light water reactor coolant. The fatigue life reduction also depends on temperature and dissolved oxygen. The fatigue life correction factor Fen has been proposed as a method to assess the fatigue life reduction in such environments. Three different models for calculating Fen for carbon and low alloy steels have been proposed by Higuchi et al., Chopra et al., and Mehta. These models were compared using considerable environmental fatigue data that were tested and published in Japan and USA and piled up in the database “JNUFAD” by the author. These models give somewhat different results in the specific conditions and a revised model for calculating Fen is thus proposed by remedying the particular drawbacks of each. In this model, the same formula is used for carbon and low alloy steels and S*,T*,O*, and ε̇* are adopted in the formula after reevaluating every parameter. The revised proposal shows better correlation with the test data than the previous models.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleRevised Proposal of Fatigue Life Correction Factor Fen for Carbon and Low Alloy Steels in LWR Water Environments
    typeJournal Paper
    journal volume126
    journal issue4
    journal titleJournal of Pressure Vessel Technology
    identifier doi10.1115/1.1767860
    journal fristpage438
    journal lastpage444
    identifier eissn1528-8978
    keywordsAlloys
    keywordsSteel
    keywordsCarbon
    keywordsFatigue life
    keywordsWater
    keywordsLight water reactors
    keywordsFatigue
    keywordsTemperature AND Oxygen
    treeJournal of Pressure Vessel Technology:;2004:;volume( 126 ):;issue: 004
    contenttypeFulltext
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