Microstructural features influencing the strength of Trimodal Aluminum Metal-Matrix-Composites

    Authors

    B. Yao; C. Hofmeister; T. Patterson; Y. H. Sohn; M. van den Bergh; T. Delahanty;K. Cho

    Comments

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    Abbreviated Journal Title

    Compos. Pt. A-Appl. Sci. Manuf.

    Keywords

    Metal-Matrix-Composites (MMCs); Microstructure; Microscopy; Powder; processing; ULTRAFINE-GRAINED METALS; NANOSTRUCTURED MATERIALS; DISLOCATION; GENERATION; MECHANICAL-BEHAVIOR; DUCTILITY; NANOCRYSTALLINE; ALLOY; DEFORMATION; TEMPERATURE; Engineering, Manufacturing; Materials Science, Composites

    Abstract

    Trimodal Al Metal-Matrix-Composites (MMCs), consisting of a nanocrystalline Al phase (NC-Al), B(4)C reinforcement particles, and a coarse-grain Al phase (CG-Al), were successfully fabricated on both lab and commercial scales. Multi-scale microstructural features contributing to the exceptional high strength of Trimodal Al MMCs were examined via comprehensive microstructural and spectroscopic analysis. Size and distribution of nanocrystalline Al grains, B(4)C particles, coarse-grain Al, and uniformity in distribution were examined and quantified. Other features such as dispersoids with and without nitrogen (e.g., Al(2)O(3), Al(4)C(3)), dislocation density, and interfacial characteristics were also examined with due respect for their contributions to the strength of Trimodal Al MMCs. (C) 2010 Elsevier Ltd. All rights reserved.

    Journal Title

    Composites Part a-Applied Science and Manufacturing

    Volume

    41

    Issue/Number

    8

    Publication Date

    1-1-2010

    Document Type

    Article

    Language

    English

    First Page

    933

    Last Page

    941

    WOS Identifier

    WOS:000279097200002

    ISSN

    1359-835X

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