Strain rate sensitivity of ductility and fracture behaviors in a Fe-28Al alloy

Mingwei Chen, Dongliang Lin, Yuanming Xia, C. T. Liu

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    The mechanical properties of Fe-28Al under a strain rate ranging from 10-4 to 1300 s -1 were tested in air and water at room temperature. The ductility, yield stress and ultimate stress of Fe-28Al are sensitive to the strain rate and gradually increase with strain rate in all test ranges. The fracture surface observations indicated that the fracture mode of Fe-28Al varies from complete transgranular fracture to a mixture of transgranular cleavage and intergranular fracture with strain rate increasing from 10-4 to 1300 s-1. It is proved that environmental embrittlement is a main factor controlling the ductility of Fe-28Al, even at high strain rate, and grain boundaries play different roles in the ductility of Fe-28Al at low and high strain rate.

    Original languageEnglish
    Pages (from-to)317-323
    Number of pages7
    JournalMaterials Science and Engineering A
    Volume239-240
    Issue number1-2
    DOIs
    Publication statusPublished - 1997 Dec

    Keywords

    • FeAl
    • Fracture behavior
    • Intermetallics
    • Strain rate sensitivity
    • Tensile impact

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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