Volume 3, Issue 2 (February 2006)

    The Challenge of Multiple Particles in Extreme Value Inclusion Rating

    (Received 6 May 2005; accepted 29 August 2005)

    Published Online: 2005

    CODEN: JAIOAD

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    Abstract

    The presence of multiple types of defect is a challenge for Extreme Value Inclusion Rating since it can lead to serious underestimation of extreme inclusion size and it can in practice make methods less robust than expected. First the paper deals with the results being obtained by ESIS TC20 within two round-robins carried out on an automotive steel and a bearing steel. Results show the need for correct assessment of multiple types of particles. We present here a new method of analysis based on a “competing risks” model together with some practical exploitation in terms of: (i) evaluation of the minimum control area to be inspected by “block maxima” sampling; (ii) new implications for data collection based on image analysis; (iii) assessment of sensitivity to the distribution of different particles.


    Author Information:

    Beretta, S
    Professor, Politecnico di Milano, Milano,

    Anderson, CW
    Professor, University of Sheffield, Sheffield,


    Stock #: JAI14041

    ISSN: 1546-962X

    DOI: 10.1520/JAI14041

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    Author
    Title The Challenge of Multiple Particles in Extreme Value Inclusion Rating
    Symposium Bearing Steel Technologies: Seventh International Symposium, 2005-05-19
    Committee A01