20.500.12556/RUL-169949 Laser-energy-density-dependent anisotropic tribological behaviour of 18Ni300 steel fabricated by selective laser melting Laser powder-bed fusion has become one of the most popular additive-manufacturing (AM) techniques for producing complex-shaped, metal engineering parts. However, to fully harness the advantages of AM for engineering steels, a deeper understanding and precise control over how the processing parameters influence the structure and properties of manufactured components are crucial. At present they remain insufficiently well explored. In this study, we systematically investigated the tribological performance of 18Ni300 steel fabricated via selective laser melting (SLM) with three distinct energy densities of the laser. The wear behaviour was evaluated on both the top (XY-plane) and side surfaces (XZ-planes) relative to the build direction to assess the degree of anisotropy. The porosity increased to 22 % with a decreasing energy density, with fully dense specimens being achieved at the highest energy density. The energy density influenced the dendrite morphology, with predominantly circular dendrites observed on the top surfaces and columnar dendrites on the side surfaces. Tribological tests were conducted at three contact pressures using a reciprocating ball-on-plate setup (100Cr6 counter ball). Optimal wear performance occurred when sliding perpendicular to the melt-pool boundaries and dendrites. Our results, which link energy density to microstructural evolution and wear mechanisms, demonstrate that strategic print orientation can reduce energy consumption by 300 % without compromising tribological performance—enabling more sustainable and cost-effective process optimization. additive manufacturing processing parameters microstructure wear friction 3D tisk procesni parametri mikrostruktura obraba trenje true false true Angleški jezik Slovenski jezik Članek v reviji 2025-06-24 12:38:13 2025-06-24 12:38:22 2026-07-08 04:12:13 0000-00-00 00:00:00 2025 0 0 16 str. art. 206212 Vol. 578/579 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621 1873-2577 10.1016/j.wear.2025.206212 240280323 1-s2.0-S0043164825004818-main.pdf 1-s2.0-S0043164825004818-main.pdf 1 C5294E9D08E3C4D751D1F5A189373487 0687654e6f31842c93358ec84fd23e94a21bb39d000e446c8b8bc82e0ce0f765 1f759c04-79e7-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=237236 https://www.sciencedirect.com/science/article/pii/S0043164825004818 0 7c8e21b2-50e5-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=211768 Fakulteta za strojništvo 0 0 0