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RESEARCH PAPERS

Mechanical Properties of Al-Mica Particulate Composite Material

[+] Author and Article Information
Deo Nath

Banaras Hindu University, Varanasi, India

R. T. Bhatt

NASA

S. K. Biswas

Indian Institute of Science, Bangalore, 560 012, India

P. K. Rohatgi

Regional Research Laboratory, Trivandrum, India

J. Eng. Mater. Technol 102(1), 78-84 (Jan 01, 1980) (7 pages) doi:10.1115/1.3224788 History: Received January 22, 1979; Online September 15, 2009

Abstract

Cast aluminium alloy mica particle composites of varying mica content were tested in tension, compression, and impact. With 2.2 percent mica (size range 40μm – 120μm) the tensile and compression strengths of aluminium alloy decreased by 56 and 22 percent, respectively. The corresponding decreases in percent elongation and percent reduction are 49 and 39 percent. Previous work [2] shows that despite this decrease in strength the composite with 2.5 percent mica and having an UTS of 15 kg/mm2 and compression strength of 28 kg/mm2 performs well as a bearing material under severe running conditions. The differences in strength characteristics of cast aluminium-mica particle composites between tension and compression suggests that, as in cast iron, expansion of voids at the matrix particle interface may be the guiding mechanism of the deformation. SEM studies show that on the tensile fractured specimen surface, there are large voids at the particle matrix interface.

Copyright © 1980 by ASME
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