Reciprocating sliding wear behavior of high-strength nanocrystalline Al84Ni7Gd6Co3 alloys

Z. Wang, K. Georgarakis, W. W. Zhang, K. G. Prashanth, J. Eckert, S. Scudino

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    Abstract

    Nanocrystalline Al-Ni-Gd-Co alloys with exceptionally high hardness have been recently developed from amorphous precursors. In the present work, the reciprocating sliding wear in the gross slip regime of these novel nanocrystalline Al-based alloys has been investigated under small amplitude oscillatory sliding motion using a martensitic chrome steel as the counter material. When compared to pure Al or Al-12Si alloy, these nanocrystalline alloys exhibit excellent wear resistance and a lower coefficient of friction when sliding against steel. The enhanced wear resistance of the novel nanocrystaline Al alloys is related to their ultra-high hardness and the hybrid nanostructure that mainly consists of nanometric intermetallic phases embedded in a nanocrystalline fcc-Al matrix. Three body abrasive conditions were created at the initial stages of the wear tests due to the formation of micro- and nano-particulate debris from the worn surface of the Al alloys; the debris was compacted under the subsequent sliding cycles forming layers that are protective to the extensive wear of the Al alloys.

    Original languageEnglish
    Pages (from-to)78-84
    Number of pages7
    JournalWEAR
    Volume382-383
    DOIs
    Publication statusPublished - 2017

    Keywords

    • Al alloys
    • Fretting wear
    • Nanocrystalline alloys
    • Reciprocating sliding wear
    • Tribological behavior
    • Wear

    ASJC Scopus subject areas

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

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