Mathe, Ntombizodwa RTshabalala, Lerato C2019-11-282019-11-282019-12Mathe, N.R. and Tshabalala, L.C. 2019. The validation of the microstructural evolution of selective laser-melted AlSi10Mg on the in-house built machine: energy density studies. Progress in Additive Manufacturing, vol. 4(4): 431-4422363-95122363-9520https://link.springer.com/article/10.1007/s40964-019-00086-6https://doi.org/10.1007/s40964-019-00086-6https://rdcu.be/bXO9qhttp://hdl.handle.net/10204/11243Copyright: 2019 Springer. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website: https://doi.org/10.1007/s40964-019-00086-6 A free fulltext non-print version of the article can be viewed at https://rdcu.be/bXO9qThe additive manufacturing of aluminium alloys has become an area of interest for the aerospace industry due to the high strength-to-weight ratios of the produced components. AlSi10Mg has been explored as an alloy of choice for building aircraft parts such as heat exchangers with internal cooling channels, etc. In this study, metal powders of AlSi10Mg containing spherical particles with good flow ability for selective laser melting were used. Various process parameters were investigated on the in-house selective laser melting system or 3D printer to demonstrate the effect of high energy densities on the microstructure and hardness properties for increasing the consolidation rate. The single track analysis showed that the higher energy densities resulted in deeper penetration depth with wider track widths. The microstructures obtained from built cubes revealed built patterns representative of the laser scans after solidification of the molten powder. X-ray diffraction data analysis presented a substantial shift in the 2 peak positions at the lowest energy density, indicating possible lattice expansion, known and non-indexed phases, and inherent strains in the material induced during the building process. The electron back-scattered diffraction results also showed a refined grain structures at lower energy densities with the presence of Al, Si, and Mg2Si, and no-indexed phases which could represent possible new phase orientations. The hardness measurements obtained in this study were higher than the conventional procedures due to grain refinement experienced during the fast heating and cooling gradients of this process.enAluminium alloys manufacturingAerospace industryArticleMathe, N. R., & Tshabalala, L. C. (2019). The validation of the microstructural evolution of selective laser-melted AlSi10Mg on the in-house built machine: energy density studies. http://hdl.handle.net/10204/11243Mathe, Ntombizodwa R, and Lerato C Tshabalala "The validation of the microstructural evolution of selective laser-melted AlSi10Mg on the in-house built machine: energy density studies." (2019) http://hdl.handle.net/10204/11243Mathe NR, Tshabalala LC. The validation of the microstructural evolution of selective laser-melted AlSi10Mg on the in-house built machine: energy density studies. 2019; http://hdl.handle.net/10204/11243.TY - Article AU - Mathe, Ntombizodwa R AU - Tshabalala, Lerato C AB - The additive manufacturing of aluminium alloys has become an area of interest for the aerospace industry due to the high strength-to-weight ratios of the produced components. AlSi10Mg has been explored as an alloy of choice for building aircraft parts such as heat exchangers with internal cooling channels, etc. In this study, metal powders of AlSi10Mg containing spherical particles with good flow ability for selective laser melting were used. Various process parameters were investigated on the in-house selective laser melting system or 3D printer to demonstrate the effect of high energy densities on the microstructure and hardness properties for increasing the consolidation rate. The single track analysis showed that the higher energy densities resulted in deeper penetration depth with wider track widths. The microstructures obtained from built cubes revealed built patterns representative of the laser scans after solidification of the molten powder. X-ray diffraction data analysis presented a substantial shift in the 2 peak positions at the lowest energy density, indicating possible lattice expansion, known and non-indexed phases, and inherent strains in the material induced during the building process. The electron back-scattered diffraction results also showed a refined grain structures at lower energy densities with the presence of Al, Si, and Mg2Si, and no-indexed phases which could represent possible new phase orientations. The hardness measurements obtained in this study were higher than the conventional procedures due to grain refinement experienced during the fast heating and cooling gradients of this process. DA - 2019-12 DB - ResearchSpace DP - CSIR KW - Aluminium alloys manufacturing KW - Aerospace industry LK - https://researchspace.csir.co.za PY - 2019 SM - 2363-9512 SM - 2363-9520 T1 - The validation of the microstructural evolution of selective laser-melted AlSi10Mg on the in-house built machine: energy density studies TI - The validation of the microstructural evolution of selective laser-melted AlSi10Mg on the in-house built machine: energy density studies UR - http://hdl.handle.net/10204/11243 ER -