Pityana, Sisa LRossouw, R2009-04-092009-04-092008-10Pityana, SL and Rossouw, R. 2008. Laser alloyed Al-Ni-Fe coatings. 27th International Congress on Applications of Lasers and Electro-Optics (ICALEO 2008), Orlando, Florida, USA, 20-23 October 2008, pp 55-609780912035123http://hdl.handle.net/10204/330327th International Congress on Applications of Lasers and Electro-Optics (ICALEO 2008), Orlando, Florida, USA, 20-23 October 2008The aim of this work was to produce crack-free thin surface layers consisting of binary (Al-Ni, Al-Fe) and ternary (Al-Ni-Fe) intermetallic phases by means of a high power laser beam. The laser surface alloying was carried out by melting Fe and Ni based powders on an aluminium substrate. The mixture of the Fe and Ni powders was varied in order to create Fe-rich and Ni-rich intermetallic phases. A Rofin 4.4 kW Nd: YAG laser was used for melting the powders and the substrate. The thin layers were analysed by menas of X-ray diffraction (XRD), optical and scanning electron microscopy (SEM). It was found that when alloying with Fe-rich mixtures, the thin surface layers contained a number of cracks in the heat affected zones (HAZ). Alloying with Ni-rich mixtures produced crack-free surface layers on the substrate. The average thickness of the layer was ~1.5mm. The XRD analyses of the alloyed layer showed a variety of intermetallic phases including Ni3Al, NiAl, FeAl, Fe3Al and Al5FeNi. The hardness of the surface layers was 3~4 times higher than that of the Al 1200 substrateenLaser beamsThin surfacingIntermetallic phasesIronNickelX-ray diffractionXRDElectro-opticsICALEO 2008Laser alloyed Al-Ni-Fe coatingsConference PresentationPityana, S. L., & Rossouw, R. (2008). Laser alloyed Al-Ni-Fe coatings. ICALEO 2008 Congress Proceedings. http://hdl.handle.net/10204/3303Pityana, Sisa L, and R Rossouw. "Laser alloyed Al-Ni-Fe coatings." (2008): http://hdl.handle.net/10204/3303Pityana SL, Rossouw R, Laser alloyed Al-Ni-Fe coatings; ICALEO 2008 Congress Proceedings; 2008. http://hdl.handle.net/10204/3303 .TY - Conference Presentation AU - Pityana, Sisa L AU - Rossouw, R AB - The aim of this work was to produce crack-free thin surface layers consisting of binary (Al-Ni, Al-Fe) and ternary (Al-Ni-Fe) intermetallic phases by means of a high power laser beam. The laser surface alloying was carried out by melting Fe and Ni based powders on an aluminium substrate. The mixture of the Fe and Ni powders was varied in order to create Fe-rich and Ni-rich intermetallic phases. A Rofin 4.4 kW Nd: YAG laser was used for melting the powders and the substrate. The thin layers were analysed by menas of X-ray diffraction (XRD), optical and scanning electron microscopy (SEM). It was found that when alloying with Fe-rich mixtures, the thin surface layers contained a number of cracks in the heat affected zones (HAZ). Alloying with Ni-rich mixtures produced crack-free surface layers on the substrate. The average thickness of the layer was ~1.5mm. The XRD analyses of the alloyed layer showed a variety of intermetallic phases including Ni3Al, NiAl, FeAl, Fe3Al and Al5FeNi. The hardness of the surface layers was 3~4 times higher than that of the Al 1200 substrate DA - 2008-10 DB - ResearchSpace DP - CSIR KW - Laser beams KW - Thin surfacing KW - Intermetallic phases KW - Iron KW - Nickel KW - X-ray diffraction KW - XRD KW - Electro-optics KW - ICALEO 2008 LK - https://researchspace.csir.co.za PY - 2008 SM - 9780912035123 T1 - Laser alloyed Al-Ni-Fe coatings TI - Laser alloyed Al-Ni-Fe coatings UR - http://hdl.handle.net/10204/3303 ER -