Characterizations of creep-fatigue crack initiation and growth life for P92 using circular notched round bar specimen

Ryuji Sugiura, A. T. Yokobori, T. Nakagawa, T. Adachi, Isamu Nonaka, M. Tabuchi, Y. Hasegawa, T. Matsuzaki

    研究成果: Conference contribution

    抄録

    A testing method under creep-fatigue interaction conditions has been proposed as the ASTM standard E2714-09. In accordance with the ASTM standard, round bar smooth specimens have been recommended as a testing specimen. Additionally, creep-fatigue crack initiation and growth life are usually defined as the attainment of a specific rate of decrease in the maximum tensile stress or the modulus of elasticity ratios. However, these criterions of crack initiation and growth life on ASTM standard are not characterized in terms of physical crack size. In this study, the creep-fatigue crack initiation and growth tests for P92 were conducted using circular notched round bar specimens. An attempt is made to measure the crack length during the tests by the direct current potential drop method, which results in the establishment of a high accuracy crack length measurement. Additionally, the life of creep-fatigue crack growth was characterized by linear cumulative damage law combined with the Qconcept which has been proposed as fracture parameter to describe the life of creep crack growth.

    本文言語English
    ホスト出版物のタイトルCreep-Fatigue Interactions
    ホスト出版物のサブタイトルTest Methods and Models
    出版社ASTM International
    ページ67-86
    ページ数20
    ISBN(印刷版)9780803175259
    DOI
    出版ステータスPublished - 2011
    イベントASTM International Symposium on Creep-Fatigue Interactions: Test Methods and Models - San Antonio, TX, United States
    継続期間: 2010 11 172010 11 19

    出版物シリーズ

    名前ASTM Special Technical Publication
    1539 STP
    ISSN(印刷版)0066-0558

    Other

    OtherASTM International Symposium on Creep-Fatigue Interactions: Test Methods and Models
    国/地域United States
    CitySan Antonio, TX
    Period10/11/1710/11/19

    ASJC Scopus subject areas

    • 材料科学(全般)

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