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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27043


    Title: Influence of microstructure on the fatigue properties of austempered ductile irons .2. Low-cycle fatigue
    Authors: Lin,CK;Hung,TP
    Contributors: 機械工程學系
    Keywords: N/A
    Date: 1996
    Issue Date: 2010-06-29 18:06:18 (UTC+8)
    Publisher: 中央大學
    Abstract: The low-cycle fatigue (LCF) properties of a number of different grades of austempered ductile irons (ADIs) were investigated. Four different base-irons were prepared with varying nodularity, nodule count, and alloy elements. Each base-iron was austenitized at 900 degrees C and then austempered at 300 and similar to 360 degrees C, respectively. Uniaxial LCF tests were conducted under strain-control at several strain amplitudes in tension-compression cyclic loading. No simple rule existed between LCF strength and monotonic tensile strength or toughness for the given ADIs as it depended on the nodule count of spheroidal graphite. The effects of austempering temperatures, nodularity, nodule count, and morphology of retained austenite in the matrix of ADI on the LCF behavior are discussed. Fractography with scanning electron microscopy was used to determine the LCF failure mechanisms and fatigue crack propagation modes. Copyright (C) 1996 Elsevier Science Limited
    Relation: INTERNATIONAL JOURNAL OF FATIGUE
    Appears in Collections:[機械工程研究所] 期刊論文

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