STP463: Evaluation of a Method of Test for Plane Strain Fracture Toughness Using a Bend Specimen

    Heyer, RH
    Supervising research metallurgist and senior research metallurgistpersonal member, Armco Steel Corp.ASTM, Middletown, Ohio

    McCabe, DE
    Supervising research metallurgist and senior research metallurgistpersonal member, Armco Steel Corp.ASTM, Middletown, Ohio

    Pages: 20    Published: Jan 1970


    Abstract

    A task group of ASTM Committee E-24 conducted an interlaboratory test program on determination of KIc using the proposed “Recommended Practice for Plane Strain Fracture Toughness Testing of High-Strength Metallic Materials Using a Fatigue-Cracked Bend Specimen.”

    Analysis of KIc data for an aluminum alloy and two high-strength alloy steels showed that laboratory mean values were within ±10 percent of grand mean values. Replication was generally satisfactory, although not as good as for smooth specimen tension tests.

    Information obtained on fatigue cracking and other details of the procedure will be useful in planned revisions, leading to a standard method of test.

    Keywords:

    interlaboratory tests, fractures (materials), toughness, fatigue cracked bend specimen, fatigue precracking, plane strain, high strength materials, aluminum alloys, steels, maraging steel, evaluation, tests


    Paper ID: STP33658S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP33658S


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