Characterization of wear particles and their relations with sliding conditions

Akihiko Umeda, Joichi Sugimura, Yuji Yamamoto

    Research output: Contribution to journalArticlepeer-review

    37 Citations (Scopus)


    Wear particles and worn surfaces generated in pin-on-disk steel sliding experiments are studied by microscope image analysis and two types of neural networks. Features of wear particles described by four particle descriptors depend strongly on sliding conditions. A multilayer neural network successfully learns the relations between wear particle features and sliding conditions. If the network is trained with data representing typical features, it also recognizes the particles having similar features. This suggests that the network can be used as a tool for condition monitoring in which the network identifies wear particles produced under unknown sliding conditions to predict that conditions. A self-organizing neural network using the competitive learning rule classifies the wear particles based on their features without any supervisor data. Particle features are expressed by the position on a two-dimensional feature map. This type of network is useful in finding typical particle features, which in turn can be used as supervisor data for the multi-layer neural network. In another application of the self-organizing network, microscopic images of both wear particles and worn surfaces are automatically classified, and characteristics of each surface are represented by the distributions of weights on the feature map.

    Original languageEnglish
    Pages (from-to)220-228
    Number of pages9
    Issue number2
    Publication statusPublished - Apr 1 1998

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Mechanics of Materials
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films
    • Materials Chemistry


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