STP642

    Corrosion-Fatigue Behavior of 13Cr Stainless Steel in Sodium-Chloride Aqueous Solution and Steam Environment

    Published: Jan 1978


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    Abstract

    To clarify the influence of sodium-chloride (NaCl) content and steam environment on fatigue strength of 13Cr stainless steel, rotating-bending fatigue tests were conducted. Fatigue strength at 107 cycles in 3 percent NaCl aqueous solution was 70 percent lower than that in air. The lower the NaCl content, the longer the fatigue life is in the same stress level. The degree of the influence of steam on fatigue life decreases with decreasing the stress, and no influence was found in the fatigue limit. Corrosion pits and subcracks were found in all tested environments except air.

    Corrosion pits were also observed at crack initiation region on fracture surface. Striation was predominant at fatigue life lower than 6 × 103 cycles in 3 to 3 x 10−3 percent NaCl and 2 x 104 cycles in steam environment.

    At longer fatigue life, intercrystalline fracture pattern was predominant.

    Keywords:

    stainless steels, corrosion fatigue, S-N, diagrams, corrosion pits, sub-cracks, striations, intercrystalline fractures, crack initiation, crack propagation


    Author Information:

    Ebara, R
    Doctor of engineering and researcher, Strength Research Laboratory; researcher, The First Experimental Laboratory; and doctor of engineering and head, Strength Research Laboratory, Hiroshima Technical Institute, Mitsubishi Heavy Industries, Ltd., Hiroshima,

    Kai, T
    Doctor of engineering and researcher, Strength Research Laboratory; researcher, The First Experimental Laboratory; and doctor of engineering and head, Strength Research Laboratory, Hiroshima Technical Institute, Mitsubishi Heavy Industries, Ltd., Hiroshima,

    Inoue, K
    Doctor of engineering and researcher, Strength Research Laboratory; researcher, The First Experimental Laboratory; and doctor of engineering and head, Strength Research Laboratory, Hiroshima Technical Institute, Mitsubishi Heavy Industries, Ltd., Hiroshima,


    Paper ID: STP28719S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP28719S


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