Measurement and Interpretation of Fatigue Crack Growth in 7075 Aluminum Alloy Using Acoustic Emission Monitoring

    Volume 26, Issue 6 (November 1998)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 8


    Gong, Z
    Royal Military College of Canada, Kingston, Ontario

    DuQuesnay, DL
    Royal Military College of Canada, Kingston, Ontario

    McBride, SL
    Acoustic Emission Monitoring Services, Inc., Kingston, Ontario

    (Received 4 November 1997; accepted 2 July 1998)

    Abstract

    A method for monitoring crack growth during highcycle fatigue tests was demonstrated using acoustic emission (AE) monitoring. Windowing techniques were employed during the recording and interpreting of the AE data. The results provided linear relationships between AE events and amplitudes and crack lengths. The fatigue crack growth results from the AE data were in very good agreement with data measured using an optical microscope.

    Fractographic observations of the crack and specimen surfaces showed that secondary cracks formed and linked to the main crack during intermediate stages of crack growth. The crack growth rate calculated from AE data reflected the formation of secondary cracks in this period.


    Paper ID: JTE12114J

    DOI: 10.1520/JTE12114J

    ASTM International is a member of CrossRef.

    Author
    Title Measurement and Interpretation of Fatigue Crack Growth in 7075 Aluminum Alloy Using Acoustic Emission Monitoring
    Symposium , 0000-00-00
    Committee E08