<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>As the reports in the literature regarding corrosion performance of Al/TiB2 MMC are rather contradictory, the optimization of laser surface alloying parameters for these composite coatings seems to be necessary. The characterization of the MMC was carried out by optical microscopy (OM), scanning electron microscopy (SEM/EDS) and x-ray diffraction (XRD). Partial melting of the alloying powder occurred and the chemical reactions with the a-Al in the matrix led to the formation of AlTi and AlB2 phases. Eutectics of TiB2/Al and TiB2/Ti were observed. The results of the tests indicate that TiB2 reinforcement does not give significant increase in microhardness of aluminium. The corrosion resistance of a single laser trackline MMC in a 3.65 % NaCl solution was improved, especially for the sample produced at high scan speed, with the lowest volume fraction of TiB2 particles.</p></abstract>

As the reports in the literature regarding corrosion performance of Al/TiB2 MMC are rather contradictory, the optimization of laser surface alloying parameters for these composite coatings seems to be necessary. The characterization of the MMC was carried out by optical microscopy (OM), scanning electron microscopy (SEM/EDS) and x-ray diffraction (XRD). Partial melting of the alloying powder occurred and the chemical reactions with the a-Al in the matrix led to the formation of AlTi and AlB2 phases. Eutectics of TiB2/Al and TiB2/Ti were observed. The results of the tests indicate that TiB2 reinforcement does not give significant increase in microhardness of aluminium. The corrosion resistance of a single laser trackline MMC in a 3.65 % NaCl solution was improved, especially for the sample produced at high scan speed, with the lowest volume fraction of TiB2 particles.

Nd: YAG laser treatment of aluminium —C TiB2 coated: Optimization of corrosion properties

Faculty of Engineering and the Built Environment, Tshwane University of Technology, P.M.B X680, Pretoria, South Africa, 0001

Centre for Scientific and Industrial Research — National Laser Centre, P.O. Box 395, Pretoria, South Africa, 0001

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

As the reports in the literature regarding corrosion performance of Al/TiB2 MMC are rather contradictory, the optimization of laser surface alloying parameters...

Nd: YAG laser treatment of aluminium —C TiB2 coated: Optimization of corrosion properties

Published Online: Dec 27, 2011

Page range: 92 - 104

DOI: https://doi.org/10.2478/s13536-011-0025-5

Keywords
MMC, TiB2, laser surface alloying, corrosion

© 2011 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Nd: YAG laser treatment of aluminium —C TiB2 coated: Optimization of corrosion properties

Published Online: Dec 27, 2011

Page range: 92 - 104

DOI: https://doi.org/10.2478/s13536-011-0025-5

KeywordsMMC, TiB2, laser surface alloying, corrosion

© 2011 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
MMC, TiB2, laser surface alloying, corrosion