Phala, MFPopoola, APITlotleng, MonnammePityana, Sisa L2019-03-232019-03-232018Phala, M.F. et al. 2018. Effect of laser scanning speed on surface properties of Ti-Si laser clad intermetallic coatings fabricated on Ti-6Al-4V alloy. International Journal of Microstructure and Materials Properties, vol. 13(5): https://doi.org/10.1504/IJMMP.2018.0972171741-84101741-8429https://doi.org/10.1504/IJMMP.2018.097217https://www.inderscienceonline.com/doi/abs/10.1504/IJMMP.2018.097217http://hdl.handle.net/10204/10839Copyright: 2018 Inderscience. Due to copyright restrictions, the attached PDF file contains the accepted version of the published article. For access to the published version, please consult the publisher's website: https://www.inderscienceonline.com/doi/abs/10.1504/IJMMP.2018.097217A binary Ti-Si (1 : 1) alloy coating was fabricated on Ti-6Al-4V alloy using laser cladding technique where Neodymium yttrium aluminium garnet laser was utilised. Micro-atomised powders of Ti and Si were used for deposition of multi-track clad coatings utilising power of 1.5 kW and a varied speed of 1.2 m/min, 1.6 m/min and 2.0 m/min. Scanning electron microscope coupled with energy dispersive spectrometer was used for microstructural characterisation and elemental analysis while a digital light microscope was used for optical imaging and coating thickness measurements. Phase identification was conducted using X-ray diffraction analyser and transverse microhardness evaluated at 100 gf for 10 s dwell time was achieved with the use of a Vickers hardness machine. The laser fabricated coatings were found to exhibit a decrease in grain size with an increase in the laser scanning speed. The microstructure of the coatings ranged from irregular refined grains, faceted grains and lamellar eutectic network of TiSS + Ti5Si3. The hardness of the coatings exhibited Ti, Si, TiS2 and Ti5Si3 phases averaged a 247.4% increase with maximum hardness recorded at 1.2 m/min scanning speed.enLaser claddingTitaniumTi5Si3 phaseScanning speedCoating thicknessMicrohardnessMicrostructureHAZHeat affected zoneSubstrateGrain structureArticlePhala, M., Popoola, A., Tlotleng, M., & Pityana, S. L. (2018). Effect of laser scanning speed on surface properties of Ti-Si laser clad intermetallic coatings fabricated on Ti-6Al-4V alloy. http://hdl.handle.net/10204/10839Phala, MF, API Popoola, Monnamme Tlotleng, and Sisa L Pityana "Effect of laser scanning speed on surface properties of Ti-Si laser clad intermetallic coatings fabricated on Ti-6Al-4V alloy." (2018) http://hdl.handle.net/10204/10839Phala M, Popoola A, Tlotleng M, Pityana SL. Effect of laser scanning speed on surface properties of Ti-Si laser clad intermetallic coatings fabricated on Ti-6Al-4V alloy. 2018; http://hdl.handle.net/10204/10839.TY - Article AU - Phala, MF AU - Popoola, API AU - Tlotleng, Monnamme AU - Pityana, Sisa L AB - A binary Ti-Si (1 : 1) alloy coating was fabricated on Ti-6Al-4V alloy using laser cladding technique where Neodymium yttrium aluminium garnet laser was utilised. Micro-atomised powders of Ti and Si were used for deposition of multi-track clad coatings utilising power of 1.5 kW and a varied speed of 1.2 m/min, 1.6 m/min and 2.0 m/min. Scanning electron microscope coupled with energy dispersive spectrometer was used for microstructural characterisation and elemental analysis while a digital light microscope was used for optical imaging and coating thickness measurements. Phase identification was conducted using X-ray diffraction analyser and transverse microhardness evaluated at 100 gf for 10 s dwell time was achieved with the use of a Vickers hardness machine. The laser fabricated coatings were found to exhibit a decrease in grain size with an increase in the laser scanning speed. The microstructure of the coatings ranged from irregular refined grains, faceted grains and lamellar eutectic network of TiSS + Ti5Si3. The hardness of the coatings exhibited Ti, Si, TiS2 and Ti5Si3 phases averaged a 247.4% increase with maximum hardness recorded at 1.2 m/min scanning speed. DA - 2018 DB - ResearchSpace DP - CSIR KW - Laser cladding KW - Titanium KW - Ti5Si3 phase KW - Scanning speed KW - Coating thickness KW - Microhardness KW - Microstructure KW - HAZ KW - Heat affected zone KW - Substrate KW - Grain structure LK - https://researchspace.csir.co.za PY - 2018 SM - 1741-8410 SM - 1741-8429 T1 - Effect of laser scanning speed on surface properties of Ti-Si laser clad intermetallic coatings fabricated on Ti-6Al-4V alloy TI - Effect of laser scanning speed on surface properties of Ti-Si laser clad intermetallic coatings fabricated on Ti-6Al-4V alloy UR - http://hdl.handle.net/10204/10839 ER -