STP579: Fatigue Crack Growth and Fracture Toughness of 5083-0 Aluminum Alloy

    Argy, G
    Metallurgical engineer, Societe Technigaz, Maurepas,

    Paris, PC
    Visiting professor of engineeringpresident, Brown UniversityDel Research Corporation, ProvidenceHellertown, R.I.Pa.

    Shaw, F
    Naval architect, American Technigaz, Incorporated, Boston, Mass.

    Pages: 35    Published: Jan 1975


    Abstract

    Certain material properties of 5083-0 aluminum alloy which would be of interest to designers of liquefied natural gas (LNG) tankage are presented and discussed. Fatigue crack growth rates obtained both from specimens containing a semielliptical surface flaw and from compact tension specimens are given and compared to other published data. Values of Kc for 2-in.-thick plate obtained from center-cracked specimens at room temperature and from compact tension specimens at both room temperature and -260°F and static and dynamic loading are presented. For the latter specimens, R-curves used in the determination of Kc values are also given. Finally, KIc values are estimated using the J-integral technique.

    The application of these data to the design of LNG tankage is discussed, paying particular attention to conditions required to assure “leak before failure” behavior.

    Keywords:

    storage tanks, fatigue (materials), fracture properties, cracking (fracturing)


    Paper ID: STP29157S

    Committee/Subcommittee: E50.01

    DOI: 10.1520/STP29157S


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