Title

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

Authors

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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