STP1231

    An Automated Image Processing System for the Measurement of Short Fatigue Cracks at Room and Elevated Temperatures

    Published: Jan 1994


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    Abstract

    An automated short crack monitoring and testing system has been developed that is fully controlled by purpose-written software. This is capable of testing and monitoring the growth of short surface breaking cracks as small as 10 μm in notched and plain specimens subject to fatigue cycling up to temperatures of 700°C. Using this new system, short fatigue crack growth data have been obtained in Waspaloy at room and elevated temperatures in a faster and more easy manner compared to the conventional methods involving surface replication techniques.

    Keywords:

    fatigue crack propagation, short crack growth, high-temperature fatigue testing, linear elastic fracture mechanics, crack from notches, automated fatigue testing, nickel-based superalloys, test automation, fracture (materials), fatigue (materials), testing methods, data analysis


    Author Information:

    Yi, L
    Research fellow and professor, University of Sheffield, Sheffield,

    Smith, RA
    Research fellow and professor, University of Sheffield, Sheffield,

    Grabowski, L
    Staff technologist, Rolls Royce plc, Derby,


    Paper ID: STP13943S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP13943S


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