Light and electron microscopy of microstructure and fractography of an ultrahigh-strength martensitic steel

Xianbo Shi, Wei Wang, Wei Ye, Wei Sha, Yiyin Shan, Minggang Shen, Ke Yang

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    Abstract

    Microstructure, tensile properties and fractography have been examined in the oil-quenched samples of a low-alloy ultrahigh strength 4340 steel. Intergranular fracture was revealed to locate at the fracture origin. However, neither the quenched Charpy V-notched impact samples nor the tempered tensile samples showed such intergranular fracture behavior. The effects of loading rate and precipitation are discussed.
    Original languageEnglish
    Pages (from-to)7-10
    Number of pages4
    JournalMicroscopy and Analysis
    Volume28
    Issue number1
    Publication statusPublished - Jan 2014

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