Title

Effect Of Al+B4C Agglomerate Size On Mechanical Properties Of Trimodal Aluminum Metal Matrix Composites

Keywords

Cryomilling; Size Effect; Strength; Trimodal Al Composites

Abstract

Trimodal aluminum (Al) metal matrix composites (MMCs) consisting of a nanocrystalline Al (ncAl) phase, B4C reinforcement particles, and a coarse grain Al (cgA1) phase contain multiscale microstructure and interfacial features that contribute to exceptional mechanical properties. One of the hierarchal microstructural features within the composite, namely the "ncA1+B4C agglomerates formed during cryomilling, is an important feature whose size can range from tens of micro-meters to millimeters. This paper reports a study on the influence of the ncA1+B4C agglomerate size on the dynamic compressive strength of the trimodal Al MMCs. A desired hierarchal microstructure for high-strength of Al MMCs is identified to contain uniformly distributed relatively small ncA1+B4C agglomerates. Commercial-scale fabrication process to achieve this microstructure includes size classification by sieving the cryomilled ncA1+B4C agglomerates.

Publication Date

4-20-2011

Publication Title

Supplemental Proceedings: Materials Fabrication, Properties, Characterization, and Modeling

Volume

2

Number of Pages

813-820

Document Type

Article; Book Chapter

Personal Identifier

scopus

DOI Link

https://doi.org/10.1002/9781118062142.ch98

Socpus ID

84951028333 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84951028333

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