STP801: Some Electrochemical and Microstructural Aspects of Corrosion Fatigue

    Congleton, J
    University of Newcastle upon Tyne, Newcastle upon Tyne,

    Craig, IH
    University of Newcastle upon Tyne, Newcastle upon Tyne,

    Olieh, RA
    University of Newcastle upon Tyne, Newcastle upon Tyne,

    Parkins, RN
    University of Newcastle upon Tyne, Newcastle upon Tyne,

    Pages: 23    Published: Jan 1983


    Abstract

    The initiation of corrosion-fatigue cracks in pure aluminum single crystals, polycrystalline aluminum, and in a BS4360 50D steel has been investigated. Experiments were performed in 3.5% sodium chloride solution, and measurements of the rate of nucleation and early growth of cracks were obtained by quantitative metallography. Initiation occurred at persistent slip bands or grain boundaries in aluminum but at inclusions in the steel.

    The role of microstructure in corrosion fatigue crack initiation is discussed. It is suggested that the growth rate of short cracks may be controlled by chemical dissolution. Results from straining electrode experiments on high yield strength steels are described that support this conclusion.

    Keywords:

    corrosion fatigue, crack initiation, 3.5% sodium chloride, aluminum, single crystal, carbon-manganese steel, straining electrode, inclusions


    Paper ID: STP44820S

    Committee/Subcommittee: G01.11

    DOI: 10.1520/STP44820S


    CrossRef ASTM International is a member of CrossRef.