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Effects of laser cladding of silicon carbides particles and iron based powder

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Yip, Mum Wai, Barnes, Stuart and Sarhan, Ahmed (2014) Effects of laser cladding of silicon carbides particles and iron based powder. Applied Mechanics and Materials, Volume 548-549 . pp. 289-293. doi:10.4028/www.scientific.net/AMM.548-549.289

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Official URL: http://dx.doi.org/10.4028/www.scientific.net/AMM.5...

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Abstract

The objective of this study was to develop clad layer by producing a Silicon Carbide (SiC) particle reinforced Metal Matrix Composite (MMC) using the iron based alloys (P25) as the matrix material. Direct laser cladding was carried out by melting the clad materials and depositing them onto a mild steel substrate. A two gravity feed system was used in this study which contained of SiC particles and iron based powder as separate powders. The intention was to melt the iron based powder and incorporate the SiC particles. Decomposition of SiC particles was observed and only a few SiC particles were found in the clad matrix. Microhardness results showed that laser clad layer had higher hardness which more than 1000 HV and hence potentially better wear resistance that base material. However, most of the SiC had evaporated which created porosity in the melt pool due to the decomposition of SiC and the resultant gas which was trapped in clad layer did not have enough time to escape from the melt pool due to the rapid solidification. Therefore, a blown powder technique is recommended for overcome this problem.

Item Type: Journal Article
Divisions: Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title: Applied Mechanics and Materials
Publisher: Trans Tech Publications Ltd.
ISSN: 1662-7482
Official Date: April 2014
Dates:
DateEvent
April 2014Available
Volume: Volume 548-549
Page Range: pp. 289-293
DOI: 10.4028/www.scientific.net/AMM.548-549.289
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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