20.500.12556/DKUM-92144 Mechanisms of defect formation in Ti-6Al-4V product during re-melting of layers in selective laser melting Knowledge of defect formation mechanisms in the manufacturing process helps improve product quality. In this study, defect formation due to re-melting of each layer in selective laser melting of Ti-6Al-4V demonstrated the physical behavior in the manufacture of metallic parts. The re-melting strategy was based on scanning with low energy density (ED) and increased ED with various combinations of laser processing parameters. The increased EDs and their parameters, namely laser power, scanning speed, and hatch distance, were selected based on the previous research experience by the authors. The concept of selecting a low ED followed by a high ED was to reduce the spattering of the powder material during the process. The low ED caused partial sintering of the powder, while the high ED caused the melting of the material, resulting in different metallurgical properties of the manufactured parts. Densities, pore properties, porosity in the initial layers, surface morphologies, and microstructures in the defective areas of the samples were studied to determine the effects of re-melting. Advantages and disadvantages were found with respect to the range of applications of the products re-melting pore properties defect surface morphology Ti-6Al-4V selective laser melting ponovno taljenje lastnosti por površinska morfologija true true false Angleški jezik Slovenski jezik https://www.sciencedirect.com/science/article/pii/S1526612523008976?via%3Dihub © 2023 The Authors Članek v reviji 2025-03-14 11:26:55 2025-03-14 11:26:55 2025-03-15 03:10:38 0000-00-00 00:00:00 2023 0 0 str. 260-275 Vol. 105 3 Nov. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2023-09-02 2023-09-16 2023-09-22 620.1/.2 166689539 10.1016/j.jmapro.2023.09.044 2212-4616 1-s2.0-S1526612523008976-main.pdf 1-s2.0-S1526612523008976-main.pdf 1 88725B14A301641103E72F22988F2FF9 e72110421899daff3d2c8241af1d93d6b1cfa508a2824d849c8ee52d4d16b638 9df4cc22-00c0-11f0-9c63-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=189359 Fakulteta za strojništvo Fakulteta za kemijo in kemijsko tehnologijo 0 0 0