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Formation of Lead Bearing Surface Layers on Aluminum Alloys by Laser Alloying

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Abstract:

The aim of the present work is to investigate the microstructure of Al-Pb monotectic surface layers generated by a laser surface alloying technique on the surface of an Al-4Cu-1.5Si-0.5Mg alloy. Monotectic alloys are generally used as materials for sliding bearings. Layers of a monotectic alloy generated by laser surface alloying have a potential for superior properties, because the rapid solidification during this process results in fine precipitation structures which can act as solid lubricant. The structure of the Al-Pb monotectic surface layers was observed in the light microscope and the scanning electron microscope. Volume fraction and size distribution of lead particles were determined by quantitative image analysis. Pin-on-disc experiments were carried out to characterize and compare the tribological properties of the Al-Pb monotecitc layers and cast Al-Cu-Si-Mg alloys.

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Periodical:

Materials Science Forum (Volume 508)

Pages:

99-104

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.508.99

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Online since:

March 2006

Authors:

Mária Svéda, András Roósz, Gábor Buza

Keywords:

Monotectic Alloy, Scanning Electron Microscope (SEM), Sliding Bearing

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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