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Erosion of aluminum based claddings on steel by sand in water

Erosion of aluminum based claddings on steel by sand in water
Erosion of aluminum based claddings on steel by sand in water
This paper describes the slurry erosion of a range of HVOF deposited aluminium-based claddings on steel by sand in water. Coatings, approximately 300 ?m thick, of commercially pure aluminium, eutectic aluminium/silicon alloy (12%) and of a novel composite incorporating alumina in this alloy have been tested, both as sprayed and as ground to remove surface roughness as far as possible. Angular silica sand of mean diameter 235 ?m was used at a concentration of 2.5% in tapwater at impingement angles of 90° and 30° and a jet velocity of 27 m/s. Mass loss data and surface structure, as shown by electron microscopy and profilometry, are related to the test conditions, initial surface topography, material hardness and microstructure, especially porosity. They are discussed in terms of the mechanisms of erosion that occur in the different materials, with reference to microcutting and plastic deformation of the surface and to the effects of the alumina inclusions. The consequences of poor flow-out, leading to significant residual porosity of the composite cladding are discussed.
erosion, aluminium, alloy, composite, porosity
0043-1648
802-808
Speyer, A.J.
12c7b482-30e6-4689-aa13-16dc8d795b1e
Stokes, K.R.
5fb4e7f7-2f7e-4e6e-a045-6d7690626695
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Speyer, A.J.
12c7b482-30e6-4689-aa13-16dc8d795b1e
Stokes, K.R.
5fb4e7f7-2f7e-4e6e-a045-6d7690626695
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73

Speyer, A.J., Stokes, K.R. and Wood, R.J.K. (2001) Erosion of aluminum based claddings on steel by sand in water. Wear, 250 (1-12), 802-808. (doi:10.1016/S0043-1648(01)00734-7).

Record type: Article

Abstract

This paper describes the slurry erosion of a range of HVOF deposited aluminium-based claddings on steel by sand in water. Coatings, approximately 300 ?m thick, of commercially pure aluminium, eutectic aluminium/silicon alloy (12%) and of a novel composite incorporating alumina in this alloy have been tested, both as sprayed and as ground to remove surface roughness as far as possible. Angular silica sand of mean diameter 235 ?m was used at a concentration of 2.5% in tapwater at impingement angles of 90° and 30° and a jet velocity of 27 m/s. Mass loss data and surface structure, as shown by electron microscopy and profilometry, are related to the test conditions, initial surface topography, material hardness and microstructure, especially porosity. They are discussed in terms of the mechanisms of erosion that occur in the different materials, with reference to microcutting and plastic deformation of the surface and to the effects of the alumina inclusions. The consequences of poor flow-out, leading to significant residual porosity of the composite cladding are discussed.

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More information

Published date: 2001
Keywords: erosion, aluminium, alloy, composite, porosity

Identifiers

Local EPrints ID: 21773
URI: http://eprints.soton.ac.uk/id/eprint/21773
ISSN: 0043-1648
PURE UUID: 3829d8cd-ed0d-43bc-b7c3-b263fae6f2af
ORCID for R.J.K. Wood: ORCID iD orcid.org/0000-0003-0681-9239

Catalogue record

Date deposited: 15 Mar 2006
Last modified: 16 Mar 2024 02:46

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Contributors

Author: A.J. Speyer
Author: K.R. Stokes
Author: R.J.K. Wood ORCID iD

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