1. AISI H13 tool steel - comparison between powder bed fused and classically produced partsSamo Tome, Irena Paulin, Matjaž Godec, 2024, published scientific conference contribution Abstract: AISI H13 Is very commonly used in the hot-work category of steels. Whether it is used as a forging die, a hotcutting tool, or a mold in injection molding or die casting, it is always on the table, as the material of choice. However, its potential has not yet been fully realized. New manufacturing techniques such as additive manufacturing (AM) broaden the horizon of the material’s application, and promise improved performance, through optimized geometry, unobtainable by traditional means, and heightened mechanical properties. One of the more widespread AM processes is Powder Bed Fusion (PBF) where a laser or electron beam constructs the model, by meting a thin coating of metal powder applied to a base plate. By repeatedly applying and melting powder, the end result is a layer-by-layer produced part. However, the techniques for producing such parts are not yet refined enough and require further research. Problems like porosities, part deflection, and crack formation due to residual stress are commonplace, while comparably low mechanical properties in the asprocessed state call for post-production treatments. Naturally, every technique has its boons and drawbacks, and that is what this work aims to analyze - How do the PBF parts compare to classically produced ones, and what are the difficulties in producing the later-mentioned parts.
Keywords: powder bed fusion, tool steel, additive manufacturing, mechanical properties
Published in DiRROS: 16.01.2025; Views: 8; Downloads: 2
 Full text (595,24 KB)
This document has many files! More... |
2. Detecting geodesic circles in hyperbolic surfaces with persistent homologyBlaž Jelenc, Žiga Virk, 2025, original scientific article Abstract: In this paper we provide conditions under which a geodesic circle on a hyperbolic surface admits arbitrarily small geodesically convex neighborhoods. This implies that persistent homology using selective Rips complexes detects the length and the position of such a loop via persistent homology in dimensions one, two, or three. In particular, if a surface has a unique systole, then the systole can always be detected with persistent homology. The existential results of the paper are complemented by the corresponding quantitative treatments which explain the choice of parameters of selective Rips complexes as well as conditions, under which the detection occurs via the standard Rips complexes. In particular, if a surface has a unique systole, then the parameters depend on the first spectral gap in the length spectrum.
Keywords: simple closed geodesic, Rips complexes, persistent homology, hyperbolic surfaces, systole
Published in DiRROS: 15.01.2025; Views: 42; Downloads: 16
Full text (1,39 MB)
This document has many files! More... |
3. |
4. Novel methodology of general scaling-approach normalization of impedance parameters of insertion battery electrodes – case study on Ni-rich NMC cathode : Experimental and preliminary analysisMarko Firm, Jože Moškon, Gregor Kapun, Sara Drvarič Talian, Ana Rebeka Kamšek, Mateja Štefančič, Samo B. Hočevar, Robert Dominko, Miran Gaberšček, 2024, original scientific article Published in DiRROS: 14.01.2025; Views: 57; Downloads: 24
Full text (2,73 MB)
This document has many files! More... |
5. |
6. |
7. |
8. Complex biophysical and computational analyses of G-quadruplex ligands : the porphyrin stacks backGiuseppe Satta, Marko Trajkovski, Alessio Cantara, Monica Mura, Claudia Meloni, Giulia Olla, Michaela Dobrovolna, Luisa Pisano, Silvia Gaspa, Andrea Salis, Lidia De Luca, Janez Plavec, 2024, original scientific article Published in DiRROS: 14.01.2025; Views: 56; Downloads: 27
Full text (2,69 MB)
This document has many files! More... |
9. Endangered plants important for selected European countriesDalibor Ballian, 2024, dictionary, encyclopaedia, lexicon, manual, atlas, map Keywords: pomen, ogroženost, geografska razširjenost, albumi, elektronske knjige
Published in DiRROS: 14.01.2025; Views: 48; Downloads: 14
Full text (47,17 MB)
This document has many files! More... |
10. |
