Pityana, Sisa L2010-07-162010-07-162010-03Pityana, S. 2010. Microstructures of alloyed and dispersed hard particles in the aluminium surface. 4th Pacific International Conference on Applications of Lasers and Optics Shangri-La Hotel (Wuhan, Peoples Republic of China), 23-25 March 2010, pp 6http://hdl.handle.net/10204/40954th Pacific International Conference on Applications of Lasers and Optics Shangri-La Hotel (Wuhan, Peoples Republic of China), 23-25 March 2010Laser surface alloying of A1200 aluminium alloy was carried out using a 4.4 kW Nd:YAG laser. Powder mixtures of SiC and TiC hard particles were injected into the laser generated melt pool on the aluminium substrate using a commercial powder feeder. The uniformly dispersed particles penetrated approximately 2 mm into the surface. The microstructure, composition and the phases in the alloyed layer were investigated. The analysis showed that the layer consisted of distinct SiC and TiC particles embedded in the layers. The scanning electron microscope (SEM) showed that a good metallurgical bond between the particles and substrate was formed. The X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) analysis techniques were employed in the identification of the phases. The layer also contained solidified TiC dendrites, plate-like Al4SiC4 and some precipitates of Ti5Si2. The hardness of the layer was three times that of the un-reinforced substrate materialenAlloysLasersAluminiumOpticsEnergy dispersive spectroscopyEDSScanning electron microscopeSEMX-ray diffractionXRDYAG laserConference PresentationPityana, S. L. (2010). Microstructures of alloyed and dispersed hard particles in the aluminium surface. http://hdl.handle.net/10204/4095Pityana, Sisa L. "Microstructures of alloyed and dispersed hard particles in the aluminium surface." (2010): http://hdl.handle.net/10204/4095Pityana SL, Microstructures of alloyed and dispersed hard particles in the aluminium surface; 2010. http://hdl.handle.net/10204/4095 .TY - Conference Presentation AU - Pityana, Sisa L AB - Laser surface alloying of A1200 aluminium alloy was carried out using a 4.4 kW Nd:YAG laser. Powder mixtures of SiC and TiC hard particles were injected into the laser generated melt pool on the aluminium substrate using a commercial powder feeder. The uniformly dispersed particles penetrated approximately 2 mm into the surface. The microstructure, composition and the phases in the alloyed layer were investigated. The analysis showed that the layer consisted of distinct SiC and TiC particles embedded in the layers. The scanning electron microscope (SEM) showed that a good metallurgical bond between the particles and substrate was formed. The X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) analysis techniques were employed in the identification of the phases. The layer also contained solidified TiC dendrites, plate-like Al4SiC4 and some precipitates of Ti5Si2. The hardness of the layer was three times that of the un-reinforced substrate material DA - 2010-03 DB - ResearchSpace DP - CSIR KW - Alloys KW - Lasers KW - Aluminium KW - Optics KW - Energy dispersive spectroscopy KW - EDS KW - Scanning electron microscope KW - SEM KW - X-ray diffraction KW - XRD KW - YAG laser LK - https://researchspace.csir.co.za PY - 2010 T1 - Microstructures of alloyed and dispersed hard particles in the aluminium surface TI - Microstructures of alloyed and dispersed hard particles in the aluminium surface UR - http://hdl.handle.net/10204/4095 ER -