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Iskalni niz: "ključne besede" (stainless steel) .

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Thermodynamic guidelines for minimizing chromium losses in electric arc furnace steelmaking
Anže Bajželj, Jaka Burja, 2025, pregledni znanstveni članek

Povzetek: In the production of stainless steel, chromium losses, particularly in the electric arc furnace (EAF) phase, pose a challenge. This study addresses these issues by reviewing and analyzing the thermodynamics of the Fe-Cr-C-O-(Si) system, highlighting discrepancies in existing literature regarding Gibbs free energies, interaction parameters, and other thermodynamic data. We developed a simple to use thermodynamic model to simulate the oxidation process using established data from scientific literature. The model calculates the equilibrium solubilities of chromium and carbon, showing how process variables like temperature, partial pressure of carbon monoxide, and silicon concentration influence chromium oxidation. The findings confirm that higher temperatures and the presence of silicon significantly reduce chromium loss by favoring carbon oxidation over chromium. The research concludes by providing practical guidelines for minimizing chromium losses in EAFs, such as protecting scrap with carbon, silicon, and aluminum; controlling oxygen intake; and ensuring a high melt temperature during decarburization. These guidelines aim to improve the economic efficiency and sustainability of stainless steel production. The paper is an expanded version of a prior conference paper.
Ključne besede: steelmaking, thermodynamics, stainless steel, electric arc furnace (EAF), decarburization, oxidation of steel melt
Objavljeno v DiRROS: 15.10.2025; Ogledov: 669; Prenosov: 344
.pdf Celotno besedilo (3,17 MB)
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Corrosion behaviour of different metallic materials for biomedical applications
Aleksandra Kocijan, 2025, pregledni znanstveni članek

Ključne besede: stainless steel, titanium alloys, NiTi, biodegradable alloys, corrosion
Objavljeno v DiRROS: 17.06.2025; Ogledov: 972; Prenosov: 512
.pdf Celotno besedilo (698,71 KB)
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Dataset for a publication: "Corrosion behaviour of different metallic materials for biomedical applications”
Aleksandra Kocijan, 2025, zaključena znanstvena zbirka raziskovalnih podatkov

Povzetek: This dataset contains corrosion measurements in simulated physiological solution.
Ključne besede: stainless steel, titanium alloys, NiTi, biodegradable alloys, corrosion
Objavljeno v DiRROS: 07.05.2025; Ogledov: 1249; Prenosov: 358
.xlsx Celotno besedilo (97,14 KB)

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Enhanced performance of austenitic oxide dispersion-strengthened 316L steel: a study on ▫$Y_2O_3$▫ reinforcement and corrosion behaviour
Jan Pokorný, Jiří Kubásek, Črtomir Donik, David Nečas, Vojtěch Hybášek, Jaroslav Fojt, Anna Dobkowska, Irena Paulin, Jaroslav Čapek, Matjaž Godec, 2025, izvirni znanstveni članek

Povzetek: This study explores the mechanical and corrosion properties of yttria-reinforced 316L stainless steel. Powder precursor materials were prepared using mechanical alloying. Varying yttria (Y2O3) contents (1, 3, and 5 wt%) were used to assess its impact on the steel’s properties. X-ray diffraction and scanning electron microscopy confirmed the successful dispersion of Y2O3 within the matrix, with the formation of chromium carbides during spark plasma sintering (SPS). The mechanical properties, including hardness and compressive yield strength, improved with increasing Y2O3 contents, with the highest strength observed in the 316L-5Y2O3 sample. However, corrosion resistance decreased with higher yttria concentrations. The 3 wt% Y2O3 sample exhibited the highest corrosion rate due to localized corrosion in areas enriched with oxide particles and chromium carbides. Electrochemical testing revealed that carbide formation and Cr-depleted regions from SPS processing contributed to the corrosion behaviour. These findings suggest that while yttria reinforcement enhances mechanical strength, optimizing the Y2O3 content and processing methods is crucial to balance both mechanical and corrosion performance in ODS 316L stainless steel.
Ključne besede: mechanical milling, SPS, 316L, austenitic stainless steel, yttria, ODS steel, corrosion, EPR-SL
Objavljeno v DiRROS: 31.01.2025; Ogledov: 1012; Prenosov: 701
.pdf Celotno besedilo (10,37 MB)
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