Mechanical Properties of Composite AA2024 Matrix with Aluminium Carbide Dispersed by High Energy Milling

E.R. Breitenbach; C.E. Costa; M.V. Folgueras; J.C.G. Milan; R.J. Antonelli; F.C. Silva

doi:10.4028/www.scientific.net/MSF.727-728.293

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HomeMaterials Science ForumMaterials Science Forum Vols. 727-728Mechanical Properties of Composite AA2024 Matrix...

Mechanical Properties of Composite AA2024 Matrix with Aluminium Carbide Dispersed by High Energy Milling

Abstract:

Dispersion strengthened aluminium composites have been prepared by mechanical alloying. At this work were studied the turning conditions to get in situ formation and dispersion of Al₄C₃on 2024 alloy by graphite addition. The alloy matrix was obtained by attrition milling a mixture of starting powders; further additions of carbon (2,5; 5 and 10% wt) were performed by means of a planetary mill. Through an adequate sintering the reinforcement formation was showed by X-Ray diffraction analysis of powders with milling times next to 20 hours. The microhardness values appointed that mechanical properties were held even soft material addition (graphite) and improved by age hardening. Pin-on-disc test revealed the composite have low friction coefficient, due to lubricant carbon action and enough low volumetric wear due to high hardness of bulk Al₄C₃ reinforcement.

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Materials Science Forum (Volumes 727-728)

Pages:

293-298

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.727-728.293

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Online since:

August 2012

Authors:

E.R. Breitenbach, C.E. Costa, M.V. Folgueras, J.C.G. Milan, R.J. Antonelli, F.C. Silva

Keywords:

Carbon, Composite, Powder metallurgy, Reinforcement

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