STP733

    A Fractographic Investigation of Stress-Corrosion Cracking in High-Strength Steel Alloys

    Published: Jan 1981


      Format Pages Price  
    PDF (1016K) 19 $25   ADD TO CART
    Complete Source PDF (14M) 19 $55   ADD TO CART


    Abstract

    The fracture separation processes of stress-corrosion cracking (SCC) specimens of steels with yield strengths in the 700 to 1400 MPa (100 to 200-ksi) range were investigated by scanning electron microscopy. Plates from a variety of processes were tested and examined. These included the electric furnace, electroslag remelt, vacuum induction melt-vacuum arc remelt, and electric furnace-vacuum arc remelt processes. The materials were studied both in the as-received condition and after heat treatment.

    Stress-corrosion cracking tests were carried out on single-edge-notched, fatigue-precracked specimens by the cantilever beam method. The specimens were fractured under stress in an aqueous 3.5 percent sodium chloride solution while galvanically coupled to zinc. The modes of fracture at the fatigue-SCC interface, in the SCC zone, and in the overload area were investigated, and a correlation was drawn between the fracture mode, the microstructure, and the resistance of the steel alloy to stress-corrosion cracking.

    Keywords:

    high-strength steels, HY-130, HY-180, stress-corrosion cracking, fractography, microstructure, steel processing, heat treating, materials, materials science


    Author Information:

    Fraser, FW
    Chemist and head of Welding Metallurgy Section, Naval Research Laboratory, Washington, D.C.,

    Metzbower, EA
    Chemist and head of Welding Metallurgy Section, Naval Research Laboratory, Washington, D.C.,


    Paper ID: STP33423S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP33423S


    CrossRef ASTM International is a member of CrossRef.