STP626

    Variables Affecting Reproducibility of the Instrumented Impact Test

    Published: Jan 1977


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    Abstract

    Instrumented impact test systems have been designed for determination of dynamic fracture toughness properties and utilized for the study of impact properties of materials in many laboratories. Since equipment varies from laboratory to laboratory, variations due to the equipment or instrumentation or both should be examined. This investigation studies variations in dynamic fracture toughness due to the test machine or calibration methods or both. The parameters chosen for the study are the peak load and the fracture energy. Two materials, AISI-4340 steel alloy and 6061-T6 aluminum alloy, were selected to evaluate the variation of these parameters.

    Keywords:

    mechanical tests, fracture properties, toughness, impact, fracture tests, equipment, aluminum alloys, alloy steels


    Author Information:

    Lum, PT
    Materials engineer and mechanical engineer, Army Material and Mechanic Research Center, Watertown, Mass.

    Curll, CH
    Materials engineer and mechanical engineer, Army Material and Mechanic Research Center, Watertown, Mass.


    Paper ID: STP27080S

    Committee/Subcommittee: E28.07

    DOI: 10.1520/STP27080S


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