1. Influence of build orientation and heat treatment on mechanical, tribological, and corrosion performance of LPBF Inconel 625Danijela Anica Skobir Balantič, Črtomir Donik, Bojan Podgornik, Aleksandra Kocijan, Matjaž Godec, 2026, izvirni znanstveni članek Ključne besede: Inconel 625, additive manufacturing, build orientation, strength, impact toughness, wear, corrosion behaviour
Objavljeno v DiRROS: 25.05.2026; Ogledov: 233; Prenosov: 133
 Celotno besedilo (21,26 MB)
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2. Influence of base plate preheating on laser powder bed fusion–processed EN AW-7075 aluminium aloyNejc Velikajne, Jože Medved, Črtomir Donik, Irena Paulin, 2026, izvirni znanstveni članek Povzetek: The influence of base plate temperature (25, 100, 200, and 400 °C) on the laser powder bed fusion processing of EN AW 7075 was systematically investigated using microstructural characterisation (LM, SEM, EBSD, GROD), chemical analysis, hardness testing, and thermal simulations across a broad range of process parameters. Moderate preheating at 100 °C and 200 °C showed no significant reduction in crack density or changes in grain morphology compared to processing without preheating. At the highest studied temperature—400 °C—a transition to columnar crack networks was observed, accompanied by modified grain orientation, pronounced stress relaxation, and reduced hardness. Independent of preheating temperature, consistent evaporation of Zn (~1 wt.%) and Mg (~0.3 wt.%) occurred during processing. Thermal simulations qualitatively supported the experimental observations, indicating increased thermal retention and displacement with increasing preheating temperature. The results demonstrate that base plate preheating alone is insufficient to suppress hot cracking in EN AW 7075 and may promote alternative crack-growth mechanisms at elevated temperatures, highlighting the need for alternative alloy or process design strategies.
Ključne besede: laser powder bed fusion (LPBF), EN AW 7075, cracks, solidification rate, base plate preheat
Objavljeno v DiRROS: 25.03.2026; Ogledov: 295; Prenosov: 298
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3. Microstructural evolution and its impact on mechanical and corrosion performance of 316L ODS steels processed by mechanical alloying and pulse plasma sinteringAnna Dobkowska, Kalyan Das, Mirosław Jakub Kruszewski, Aleksandra Zielińska, Marlene González, Bogusława Adamczyk-Cieślak, Jiří Kubásek, Jan Pokorný, David Nečas, Črtomir Donik, Irena Paulin, Kamil Majchrowicz, Jarosław Mizera, Matjaž Godec, 2026, izvirni znanstveni članek Ključne besede: ODS steels, austenitic steels, corrosion, mechanical properties
Objavljeno v DiRROS: 02.03.2026; Ogledov: 364; Prenosov: 308
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4. Gamma irradiation-induced modifications in the structural and dielectric properties of GO/PVA/AgNW nanocompositesMarjetka Conradi, Črtomir Donik, Mustafa Muradov, Goncha Eyvazova, Ahmet Asimov, Mahammad Baghir Baghirov, 2026, izvirni znanstveni članek Ključne besede: gamma irradiation, nanocomposite, graphene oxide, silver nanowire
Objavljeno v DiRROS: 26.02.2026; Ogledov: 413; Prenosov: 220
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5. Laser-engineered Inconel 625 for enhanced oxygen evolution electrocatalysisAngelja Kjara Surca, Marjan Bele, Črtomir Donik, Irena Paulin, Martin Šala, Jakob Starec Oman, Miha Osredkar, Mejrema Nuhanović, Jan Ocepek, Matjaž Godec, Goran Dražić, Nejc Hodnik, Luka Suhadolnik, 2026, izvirni znanstveni članek Objavljeno v DiRROS: 02.02.2026; Ogledov: 420; Prenosov: 323
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7. Insights into surface microstructural engineering of Inconel 625 for enhanced oxygen evolution reaction performanceLuka Suhadolnik, Črtomir Donik, Blaž Tomc, Mejrema Nuhanović, Martin Šala, Marjan Bele, Matjaž Finšgar, Andraž Mavrič, Iztok Arčon, Matjaž Godec, Nejc Hodnik, 2025, izvirni znanstveni članek Ključne besede: electrocatalysis, compositionally complex materials, commercial nickel alloys, oxygen evolution reaction, scanning electron microscopy, IL-SEM
Objavljeno v DiRROS: 29.10.2025; Ogledov: 732; Prenosov: 468
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8. A core–shell TiON–C nanostructure as a self supported and scalable electrode for fast oxygen evolution reaction in acidic mediaFederico Baiutti, Kosova Kreka, Aleš Marsel, Miha Hotko, Marjan Bele, Anja Logar, Martin Šala, Črtomir Donik, Lazar Bijelić, Carolina Duque Serra, Alex Morata, Albert Tarancón, Miran Gaberšček, Nejc Hodnik, 2025, izvirni znanstveni članek Ključne besede: PEMEC, fuel cells, hydrogen, titania, iridium, anode
Objavljeno v DiRROS: 29.10.2025; Ogledov: 705; Prenosov: 325
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9. Workflow and practical guidance for identical location scanning electron microscopy: reliable tracking of localized transformationsBlaž Tomc, Marjan Bele, Ana Rebeka Kamšek, Milena Martins, Aleš Marsel, Miha Hotko, Stefan Popović, Gregor Kapun, Črtomir Donik, Mitja Kostelec, Matjaž Godec, Nejc Hodnik, Luka Suhadolnik, 2025, izvirni znanstveni članek Povzetek: Understanding material transformations at the nano- and microscale is essential for advancing electrocatalysis, energy storage, and other applications. Conventional SEM imaging, which captures random locations before and after treatment, struggles to distinguish real transformations from inherent sample heterogeneity. Identical Location SEM (IL-SEM) overcomes this by enabling re-imaging of the exact same region, offering clear evidence of localized changes in morphology, structure, and composition. Despite its simplicity and wide applicability, IL-SEM remains underutilized. This article presents a detailed, practical guide to implementing IL-SEM reliably, including sample alignment, multiscale imaging, and consistent re-localization. Key methodological tips and solutions to common challenges are provided, making the approach accessible even for non-expert users. To showcase its versatility, we present case studies involving electrocatalysts, alloys, and nanostructured materials. Moreover, by integrating IL-SEM with energy-dispersive spectroscopy (EDS) and electron backscatter diffraction (EBSD), we demonstrate how compositional and crystallographic evolution can be tracked alongside morphological changes. This optimized workflow offers a powerful, non-destructive method for visualizing dynamic material behavior and provides a foundation for IL-SEM to become a standard technique for studying structural evolution across diverse materials research fields.
Ključne besede: electrocatalysis, identical location electron microscopy, IL-SEM, materials characterization, scanning electron microscopy, surface analysis
Objavljeno v DiRROS: 15.10.2025; Ogledov: 784; Prenosov: 464
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10. Grain-resolved mapping of oxygen evolution activation on a Ni-superalloyČrtomir Donik, Luka Suhadolnik, Blaž Tomc, Anton Voronkin, Jon Ustarroz, Marjan Bele, Matjaž Godec, Nejc Hodnik, 2025, izvirni znanstveni članek Povzetek: We report the first grain-resolved mapping of oxygen evolution reaction (OER) activation on a Ni-based superalloy using identicallocation EBSD, complemented by IL-SEM, IL-EDS, and SECCM. NiFe (oxy)hydroxide film formation and OER activity are strongly influenced by grain size and orientation, with (111)-oriented and smaller grains showing the highest activity. These findings reveal pronounced microstructure heterogeneity and establish IL-EBSD as a powerful tool for guiding the design of advanced electrocatalysts.
Ključne besede: Ni-superalloy, IL-SEM, IL-EDS, SECCM
Objavljeno v DiRROS: 10.10.2025; Ogledov: 670; Prenosov: 362
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