20.500.12556/DiRROS-24583 Heat treatment optimisation of 18 % Ni maraging steel produced by DED-ARC for enhancing mechanical properties This article deals with the Directed Energy Deposition using Wire and Arc (DED-ARC) for maraging steel cladding. A technology for cladding using Gas Metal Arc Welding (GMAW) has been developed that enables the perfect deposition of maraging steel. The material characterisation was carried out in different material states: in the as-built, solution annealed and aged. The research included visual examinations, optical microscopy, Scanning Electron Microscopy / Energy-dispersive X-ray spectroscopy (SEM/EDS), fractography, hardness testing, tensile testing and impact toughness testing. The as-deposited state exhibited a microstructure with very long crystal grains and microsegregations orientated the direction of the heat sink, consisting of lath martensite. Consequently, a subsequent heat treatment is absolutely necessary in order to obtain a uniform fine-grained microstructure. Two different solution annealing processes were analysed, which allowed us to select the most suitable process for the first step of heat treatment followed by aging. A response surface methodology was used to optimise the aging conditions. The results show that additively manufactured maraging steel reaches a tensile strength of 1947 MPa, a hardness of 657 HV5 and a Charpy impact toughness of 11 J at peak aging condition, which is comparable to conventionally manufactured maraging steel. maraging steel heat treatment material properties optimisation DED-ARC GMAW RSM maraging jeklo toplotna obdelava optimizacija materialnih lastnosti DED-ARC MIG metoda odziva površin true false true Elsevier Nizozemska Angleški jezik Slovenski jezik © 2025 The Author(s). Published by Elsevier B.V. Neznano 2025-12-08 12:57:41 2025-12-08 12:57:42 2025-12-09 03:43:59 0000-00-00 00:00:00 2025 0 0 Nasl. z nasl. zaslona; Opis vira z dne 26. 5. 2025; Soavtorji: Damjan Klobčar, Aleš Nagode, Nikolaj Mole, Borut Žužek, Tomaž Vuherer; str. 1-12 Vol. 11, 100312 Jun. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2025-06-01 621.791.75:669.14 2666-3309 10.1016/j.jajp.2025.100312 237223939 RAZ_Lindic_Maja_2025.pdf RAZ_Lindic_Maja_2025.pdf 1 BFD3B321950A21850974C4280D182A48 b2b9f0d4b0e75eaf4d7a91ccf6cefecfb06592aed7711b8461356a04f445ade1 5864468c-d42d-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=36675 https://www.sciencedirect.com/science/article/pii/S2666330925000330 1 1d26546b-d42d-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=36674 Inštitut za kovinske materiale in tehnologije 0 0 0