Moller, HeinBurger, HermanTlotleng, MonnammeYadroitsev, IMakoana, Nkutwane W2017-05-162017-05-162016-11Makoana, N.W., Moller, H., Burger, H. et al. 2016. Evaluation of single tracks of 17-4PH steel manufactured at different power densities and scanning speeds by selective laser melting. South African Journal of Industrial Engineering, vol. 27(3): 210-2182224-7890http://dx.doi.org/10.7166/27-3-1668http://hdl.handle.net/10204/9038Copyright: The authors 2016. Authors retain copyright and grant the Journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this Journal.In Selective Laser Melting, the initial units produced are single tracks that overlap to create a single layer; from the sequence of layers, a 3D object is manufactured. The properties of the parts produced by SLM depend heavily on the properties of each single track and each layer formed by these tracks. This study evaluates the effect of processing parameters on the geometrical characteristics of single tracks manufactured from 17-4PH stainless steel powder. A single-mode continuous-wave ytterbium fibre laser was used to manufacture single tracks at laser powers in the range of 100-300 W with a constant spot size of ~80µm. The single tracks produced were subjected to standard metallographic preparation techniques for further analysis with an optical microscope. Deep molten pool shapes were observed at low scan speeds, while shallow molten pool shapes were observed at high scan speeds. At higher laser power densities, under-cutting and humping effects were also observed. The dimensions of single tracks processed without powder generally decrease with increasing scan speed at constant laser power. However, the geometrical features of the single tracks processed with powder revealed pronounced irregularities believed to be caused by non-homogeneity in the deposited powder layer.enCC0 1.0 UniversalSelective Laser MeltingArticleMoller, H., Burger, H., Tlotleng, M., Yadroitsev, I., & Makoana, N. W. (2016). Evaluation of single tracks of 17-4PH steel manufactured at different power densities and scanning speeds by selective laser melting. http://hdl.handle.net/10204/9038Moller, Hein, Herman Burger, Monnamme Tlotleng, I Yadroitsev, and Nkutwane W Makoana "Evaluation of single tracks of 17-4PH steel manufactured at different power densities and scanning speeds by selective laser melting." (2016) http://hdl.handle.net/10204/9038Moller H, Burger H, Tlotleng M, Yadroitsev I, Makoana NW. Evaluation of single tracks of 17-4PH steel manufactured at different power densities and scanning speeds by selective laser melting. 2016; http://hdl.handle.net/10204/9038.TY - Article AU - Moller, Hein AU - Burger, Herman AU - Tlotleng, Monnamme AU - Yadroitsev, I AU - Makoana, Nkutwane W AB - In Selective Laser Melting, the initial units produced are single tracks that overlap to create a single layer; from the sequence of layers, a 3D object is manufactured. The properties of the parts produced by SLM depend heavily on the properties of each single track and each layer formed by these tracks. This study evaluates the effect of processing parameters on the geometrical characteristics of single tracks manufactured from 17-4PH stainless steel powder. A single-mode continuous-wave ytterbium fibre laser was used to manufacture single tracks at laser powers in the range of 100-300 W with a constant spot size of ~80µm. The single tracks produced were subjected to standard metallographic preparation techniques for further analysis with an optical microscope. Deep molten pool shapes were observed at low scan speeds, while shallow molten pool shapes were observed at high scan speeds. At higher laser power densities, under-cutting and humping effects were also observed. The dimensions of single tracks processed without powder generally decrease with increasing scan speed at constant laser power. However, the geometrical features of the single tracks processed with powder revealed pronounced irregularities believed to be caused by non-homogeneity in the deposited powder layer. DA - 2016-11 DB - ResearchSpace DO - 10.7166/27-3-1668 DP - CSIR KW - Selective Laser Melting LK - https://researchspace.csir.co.za PY - 2016 SM - 2224-7890 T1 - Evaluation of single tracks of 17-4PH steel manufactured at different power densities and scanning speeds by selective laser melting TI - Evaluation of single tracks of 17-4PH steel manufactured at different power densities and scanning speeds by selective laser melting UR - http://hdl.handle.net/10204/9038 ER -