1 Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, South Africa, 2 National Laser Center, Council for Scientific and Industrial Research, Pretoria, South Africa 3Metallurgical and Materials Engineering, University of Lagos, Akoka, Nigeria Correspondence *Modupeola Dada, Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, South Africa,. Email: dadadupeola@gmail.com Abstract Aerospace components and its coatings are required to possess excellent surface properties namely: fatigue, wear and corrosion resistance over a wide temperature range. Stainless steels, titanium, nickel super alloy and more recently high entropy alloys have been used to improve the exterior properties of these components. In this study, AlCoCrFeNiCu and AlTiCrFeCoNi High Entropy Alloys were successfully fabricated using laser additive manufacturing to produce coatings on a mild steel base plate. The influence of the laser parameters (laser power and scan speed) on the microstructure, hardness and coat geometry (height, width and depth) were also investigated. The results revealed that coatings homogeneously adhered to substrate. The optimum processing parameters for both alloys with defect free structures at a preheat temperature of 400 °C, were at 1200-1600 W at 8-12 mm/s with the layers composed of both FCC and BCC phases. The geometry, quality and hardness were significantly affected by the laser parameters. The results showed that optimizing the laser parameters achieved by means of preheating temperature invariably improved the performance of the alloys with potential coatings and structural applications. KEYWORDS Laser Coating, Laser parameters, High Entropy Alloys, Bead Geometry, Additive Manufacturing