Mechanical properties of multilayer Ni-Fe and Ni-Fe-Al2O3 nanocomposite coating

V. Torabinejad, M. Aliofkhazraei, A. Sabour Rouhaghdam, M.H. Allahyarzadeh, Takeshi Kasama, Hossein Alimadadi

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    A sulfate-based electrolyte was used for synthesis of multilayer (ML) and monolithic Ni-Fe-Al2O3 coatings. The ML electrodeposits were achieved by consecutive alteration of duty cycle of pulsed current between two values of 20% and 90%. The influences of the ML microstructure on mechanical properties and wear resistance of composite coatings were studied. The shear punch testing method was employed to evaluate the room temperature mechanical properties. It was shown that increasing the pulse frequency and decreasing the pulse duty cycle improved the mechanical properties of monolithic coatings. The electrodeposited ML coatings exhibited a pronounced improvement in microhardness, shear strength and wear resistance in comparison to the monolithic coatings. Pin-on-disk sliding wear tests revealed that the main mechanisms of wear are plastic deformation, fatigue crack of deformed layers and delamination.
    Original languageEnglish
    JournalMaterials Science and Engineering: A - Structural Materials: Properties, Microstructure and Processing
    Volume700
    Pages (from-to)448-456
    Number of pages9
    ISSN0921-5093
    DOIs
    Publication statusPublished - 2017

    Keywords

    • Multilayer
    • Pulse electrodeposition
    • Nanocomposite
    • Mechanical properties
    • Wear

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