naa a22 4500 510769896 CHVBK 20180411083210.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11837-013-0611-6 doi (NATIONALLICENCE)springer-10.1007/s11837-013-0611-6 Deposition Mechanism and Microstructure of Laser-Assisted Cold-Sprayed (LACS) Al-12wt.%Si Coatings: Effects of Laser Power [Elektronische Daten] [E. Olakanmi, M. Tlotleng, C. Meacock, S. Pityana, M. Doyoyo] Surface treatment is one of the most costly processes for treating metallic components against corrosion. Laser-assisted cold spray (LACS) has an opportunity to decrease those costs particularly in transportation systems, chemical industries, and renewable energy systems. This article highlights some of those potential applications. In the LACS process, a laser beam irradiates the substrate and the particles, thereby softening both of them. Consequently, the particles deform upon impact at the substrate and build up a coating. To circumvent the processing problems associated with cold-spray (CS) deposition of low-temperature, corrosion-resistant Al-12wt.%Si coatings, a preliminary investigation detailing the effect of laser power on its LACS deposition mechanism and microstructural properties is presented. The deposition efficiency, the microstructure, and the microhardness of the LACS-deposited coatings produced by a 4.4-kW Nd:YAG laser system were evaluated. The outcome of this study shows that pore- and crack-free Al-12wt.%Si coatings were deposited via softening by laser irradiation and adiabatic shearing phenomena at an optimum laser power of 2.5kW. TMS, 2013 Olakanmi E. Department of Mechanical Engineering Science, University of Johannesburg, 2006, Johannesburg, South Africa aut Tlotleng M. Department of Mechanical Engineering Science, University of Johannesburg, 2006, Johannesburg, South Africa aut Meacock C. National Laser Centre, Council for Scientific and Industrial Research, 0001, Pretoria, South Africa aut Pityana S. National Laser Centre, Council for Scientific and Industrial Research, 0001, Pretoria, South Africa aut Doyoyo M. Department of Mechanical Engineering Science, University of Johannesburg, 2006, Johannesburg, South Africa aut JOM Springer US; http://www.springer-ny.com 65/6(2013-06-01), 776-783 1047-4838 65:6<776 2013 65 11837 https://doi.org/10.1007/s11837-013-0611-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11837-013-0611-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Olakanmi E. Department of Mechanical Engineering Science, University of Johannesburg, 2006, Johannesburg, South Africa aut NATIONALLICENCE 700 1- Tlotleng M. Department of Mechanical Engineering Science, University of Johannesburg, 2006, Johannesburg, South Africa aut NATIONALLICENCE 700 1- Meacock C. National Laser Centre, Council for Scientific and Industrial Research, 0001, Pretoria, South Africa aut NATIONALLICENCE 700 1- Pityana S. National Laser Centre, Council for Scientific and Industrial Research, 0001, Pretoria, South Africa aut NATIONALLICENCE 700 1- Doyoyo M. Department of Mechanical Engineering Science, University of Johannesburg, 2006, Johannesburg, South Africa aut NATIONALLICENCE 773 0- JOM Springer US; http://www.springer-ny.com 65/6(2013-06-01), 776-783 1047-4838 65:6<776 2013 65 11837 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer