STP579

    Low Temperature Fracture Behavior of Iron-Nickel Alloy Steels

    Published: Jan 1975


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    Abstract

    Fracture toughness tests over the interval 298 to 4 K and fatigue crack growth rate tests at 298, 111, and 76 K are reported on selected iron-nickel (Fe-Ni) alloys which are commercially available for potential use in storage or transportation of liquefied natural gas (LNG). These alloys include Fe-6Ni and Fe-5Ni in newly developed three-step heat treatments and Fe-9Ni in the quenched and tempered condition. Linear elastic fracture mechanics parameters (KQ, KIC) and J-integral (JIC) test data are presented for 1.25-in.-thick compact specimens. Discussion includes comparisons of fatigue crack growth rate and fracture data between alloys.

    Keywords:

    storage tanks, crack propagation, cryogenics, fracture properties, iron alloys, mechanical properties, nickel alloys, steels


    Author Information:

    Tobler, RL
    Metallurgist, metallurgist, technical assistant, and section chief of the Properties of Solids Section, Institute for Basic Standards, National Bureau of Standards, Boulder, Colo.

    Mikesell, RP
    Metallurgist, metallurgist, technical assistant, and section chief of the Properties of Solids Section, Institute for Basic Standards, National Bureau of Standards, Boulder, Colo.

    Durcholz, RL
    Metallurgist, metallurgist, technical assistant, and section chief of the Properties of Solids Section, Institute for Basic Standards, National Bureau of Standards, Boulder, Colo.

    Reed, RP
    Metallurgist, metallurgist, technical assistant, and section chief of the Properties of Solids Section, Institute for Basic Standards, National Bureau of Standards, Boulder, Colo.


    Paper ID: STP29165S

    Committee/Subcommittee: E50.01

    DOI: 10.1520/STP29165S


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