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    Predicting Sheet Anisotropy from the Fracture Angle of Tension Specimens

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    Fracture angles and plastic strain ratios (r values) for aluminum alloys 2036-T4, 3004-H19, 5182-O, and 5352-H19 were determined and compared to the theoretical relationship between localized necking angle and r value. Data determined for 3004-H19 and 5352-H19 specimens, which exhibit minimal diffuse necking prior to localized necking, follow the theoretical relationship, while data determined for 2036-T4 and 5182-O specimens, which exhibit considerable diffuse necking, do not. Empirically determined fracture angle correction terms were developed for 2036-T4 and 5182-O to permit reasonable estimates of r based on the theoretical relationship.


    metal forming, formability, aluminum alloys, anisotropy, plastic strain, fracture properties, fracture tests, tension tests, necking

    Author Information:

    Lege, DJ
    Engineer, Aluminum Company of America, Pa

    Committee/Subcommittee: E28.06

    DOI: 10.1520/STP30047S