Volume 35, Issue 6 (November 2007)

    Determination of the Fatigue Resistance of HVOF Thermal Spray WC-CoCr Coatings by Means of Impact Testing

    (Received 21 November 2006; accepted 13 June 2007)

    Published Online: 2007

    CODEN: JTEOAD

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    Abstract

    Impact testing is an efficient experimental procedure that enables the determination of the fatigue resistance of mono- and multi-layer coatings deposited on various substrates, which was not possible with the common testing methods previously available. In this paper an advanced impact tester, able to assess the fatigue failure resistance of coatings working under cyclic loading conditions, is presented. The fatigue failure of the tested coatings was determined by means of scanning electron, optical microscopy, and EDX analysis. The test results are recorded in diagrams containing the impact load versus the number of successive impacts that the examined coatings can withstand. From the experimental results it was concluded that a hard, wear resistant HVOF thermal spray WC-CoCr coating deposited on P91 steel substrate presents a high fatigue resistance.


    Author Information:

    David, Constantine
    Professor, Mechanical Engineering Department, Technical University of Serres, Serres

    Anthymidis, Konstantinos
    Head of Materials Science Department, Applied Research Center, Serres

    Agrianidis, Pavlos
    Professor, Mechanical Engineering Department, Technical University of Serres, Serres

    Tsipas, Dimitrios
    Professor, Laboratory of Physical Metallurgy, Aristotle University, Thessaloniki,


    Stock #: JTE100922

    ISSN: 0090-3973

    DOI: 10.1520/JTE100922

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    Author
    Title Determination of the Fatigue Resistance of HVOF Thermal Spray WC-CoCr Coatings by Means of Impact Testing
    Symposium , 0000-00-00
    Committee E08