Wear and impact behaviour of High Velocity Air-Fuel sprayed Fe-Cr-Ni-B-C alloy coatings

Giovanni Bolelli, Andrea Milanti, Luca Lusvarghi, Lorenzo Trombi, Heli Koivuluoto, Petri Vuoristo

    Research output: Contribution to journalArticleScientificpeer-review

    28 Citations (Scopus)

    Abstract

    The tribological properties of High Velocity Air-Fuel sprayed Fe-31Cr-12Ni-3.6B-0.6C (wt%) coatings are studied as a function of the deposition parameters. At room temperature, ball-on-disk sliding against Al2O3 is controlled by abrasive grooving and interlamellar cracking, with some tribo-oxidation. Interlamellar crack propagation also controls the coatings response to cavitation erosion and cyclic impact tests. Coatings deposited with higher powder feed rate exhibit poorer performance under all conditions, because of weaker interlamellar cohesion. At 700 °C, sliding wear rates are levelled out, and they are one order of magnitude higher than at room temperature, because of severe abrasive grooving.

    Original languageEnglish
    Pages (from-to)372-390
    JournalTribology International
    Volume95
    Early online date30 Nov 2015
    DOIs
    Publication statusPublished - 2016
    Publication typeA1 Journal article-refereed

    Keywords

    • Cavitation damage
    • Impact wear
    • Sliding contact
    • Thermally-sprayed coating

    Publication forum classification

    • Publication forum level 2

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Mechanics of Materials
    • Surfaces, Coatings and Films
    • Surfaces and Interfaces

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