ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Effect of nanostructured Al on microstructure, microhardness and sliding wear behavior of Al-xGnP composites by powder metallurgy (PM) route

Kumar, Lailesh and Alam, Syed N and Sahoo, Santosh K (2019) Effect of nanostructured Al on microstructure, microhardness and sliding wear behavior of Al-xGnP composites by powder metallurgy (PM) route. In: INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, 110 (10). pp. 954-962.

Full text not available from this repository.
Official URL: https://dx.doi.org/10.3139/146.111826

Abstract

In the present work, Al-based metal matrix composites (MMCs) have been developed by the powder metallurgy (PM) route using exfoliated graphite nanoplatelets (xGnP) as nanofillers and their microstructure, microhardness and sliding wear behaviour were investigated. The Al-based MMCs were developed by using nanostructured Al powder developed by mechanical milling for 25 h in a high energy planetary ball mill. The crystallite size and lattice strain of Al after 25 h of milling were found to be 32 nm and 0.383%, respectively. Al-1, 2, 3 wt.% xGnP composites were developed by the PM route. A significant improvement in both the microhardness and wear resistance of the Al-xGnP up to addition of 3 wt.% of the nanofiller was observed. For Al-3 wt.% xGnP composite developed using as-milled nanostructured Al, a microhardness of similar to 1 GPa could be achieved, which is similar to 6 times higher than that of the pure sintered Al sample (similar to 169.7 MPa). Nanostructured Al also leads to enhancement of the wear behaviour as compared to as-received Al. The wear mechanism in the various composites was found to involve a combination of abrasion, ploughing, delamination, microcracks, deep grooves and pullout of nanofillers.

Item Type: Journal Article
Publication: INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
Publisher: CARL HANSER VERLAG
Additional Information: Copyright of this article belongs to CARL HANSER VERLAG
Keywords: Al-based metal matrix composites (MMCs); Mechanical milling (MM); Exfoliated graphite nanoplatelets (xGnP); Microhardness; Sliding wear behaviour
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 20 Jan 2020 06:42
Last Modified: 20 Jan 2020 06:42
URI: http://eprints.iisc.ac.in/id/eprint/63845

Actions (login required)

View Item View Item