STP942

    Low Cycle Fatigue of Some Aluminum Alloys

    Published: Jan 1988


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    Abstract

    Axial strain-controlled tests were performed on five aluminum alloys to provide information on their cyclic behavior. The alloys chosen for this investigation represent a complete survey of the strengthening mechanisms associated with commercial aluminum products. The strengthening microstructures ranged from subgrain and dislocation strengthening in the 1200 alloy, solid solution strengthening by magnesium in the 5083, and the high density of GP zones and finely dispersed precipitates in the case of the 7005, 6351, and 6061 alloys. The five alloys were plant-fabricated with commercial tempers.

    One important aspect of the tests was the detailed measurement of the hysteresis loop shape change during cycling and its possible correlation with the fatigue performance. The fatigue results show the effect of microstructure and confirm the presence of a break in the Coffin-Manson plot.

    Keywords:

    low cycle fatigue, aluminum alloys, microstructure, hysteresis loop


    Author Information:

    Chung, YS
    The University of Sydney, Sydney,

    Abel, A
    The University of Sydney, Sydney,


    Paper ID: STP24477S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP24477S


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