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| Gradientné mikro/nano kompozity s Al matricou pripravené spekaním pomocou pulzného elektrického prúdu | |
| Gradient micro / nano composites with Al matrix prepared by pulsed electric current sintering | |
| Program: | VEGA |
| Project leader: | Ing. Puchý Viktor, PhD. |
| Annotation: | The project is focused on the experimental research of the new progressive gradient micro / nano compositeswith aluminum matrix reinforced with ceramic particles and carbon nanoparticles – graphene nanoplatelets(GNPs), applicable in the automotive, aerospace and defense industries. Composite powders based on Al alloyswith different contents of hard ceramic particles and GNPs will be prepared, which will be homogenized by mixingand surface activated by grinding in a ball mill in ethanol. The powders thus prepared will be deposited andlayered (geometrically, gradient arranged (FGM)) in a hexagonal graphite mold and then pulsed electric currentsintered in a vacuum in "Spark Plasma Sintering" furnace (SPS). Mechanical and ballistic properties will beanalyzed and correlated with microstructure, texture, fractographic analysis and the content of added particlesand additives. |
| Duration: | 1.1.2023 – 31.12.2025 |
| Výskum odolnosti a prevencie moderných konštrukčných materiálov voči vodíkovému krehnutiu | |
| Research of the resistance and prevention of modern structural materials against hydrogen embrittlement | |
| Program: | VEGA |
| Project leader: | Ing. Falat Ladislav, PhD. |
| Annotation: | The aim of the project is to investigate the susceptibility to hydrogen embrittlement (HE) of structural metallicmaterials based on Fe (i.e. modern grades of carbon and alloy steels) as well as selected alloys or compositesbased on non-ferrous metals (e.g. Al, Cu, Mg, etc.) by the method of electrochemical hydrogen charging andmechanical testing in laboratory conditions. The microstructural conditionality of hydrogen embrittlement will be investigated on defined material states with characteristic microstructural parameters (grain size, phase composition, etc.). The possibilities of HE prevention will be investigated using available methods of surface modification (layers and coatings, surface alloying, formation of gradient structures, etc.) of basic materials inorder to apply a barrier effect against hydrogen permeability. |
| Duration: | 1.1.2022 – 31.12.2025 |
| Predikcia zvariteľnosti a lisovateľnosti kombinovaných laserom zváraných prístrihov z vysokopevných ocelí s podporou CAE systémov | |
| Prediction of weldability and formability for laser welded tailored blanks made of combined high strength steels with CAE support | |
| Program: | VEGA |
| Project leader: | Ing. Kepič Ján, PhD. |
| Annotation: | The aim of the project is to verify the virtual engineering techniques when design and production of prototypes of molds and dies for the production of thin-walled automotive components from tailored laser welded blanks. Based on the results obtained on physical models of selected thin-walled car components, applied CAD/CAE/CAM techniques will be verified. The core of the project consist of CAE analyses and predictions of laser welds microstructure, weldability and formability of laser welded blanks made of combined steels. Verified methodologies for the weldability and the formability prediction should contribute to include more knowledge and less material when design thin-walled car-body components. Thus, low emissions at car operation is reached, production time shortening and production costs decrease as well. |
| Duration: | 1.1.2019 – 31.12.2022 |
| Extremecer – Keramické materiály pre použitie v extrémnych podmienkach | |
| Ceramic materials for extreme operating conditions | |
| Program: | SRDA |
| Project leader: | prof. RNDr. Dusza Ján, DrSc. |
| Duration: | 1.7.2016 – 30.6.2020 |
| AMEMAT – Rozvoj poznatkovej bázy v oblasti pokročilých kovových materiálov s využitím moderných teoretických, experimentálnych a technologických postupov | |
| Advancement of knowledge in area of advanced metallic materials by use of up-to-date theoretical, experimental, and technological procedures | |
| Program: | SRDA |
| Project leader: | RNDr. Homolová Viera, PhD. |
| Annotation: | The project is focused on the acceleration of progress in gaining knowledge about advanced metallic materials. In the related research the representative part of the Slovak scientific basis will be involved, namely the SlovakUniversity of Technology (STU) in Bratislava, the Institute of Physics (IP) of the Slovak Academy of Sciences (SAS), and the Institute of Materials Research (IMR) of SAS. To fulfil project tasks, the top-level recently provided equipment will be used, available at the university scientific parks of STU located in Bratislava and Trnava as well as at the scientific centres of SAS located in Bratislava (IP) and Košice (IMR). The experimental research will be combined with calculations from first principles (IP SAS) and thermodynamic predictions (IMR SAS), both the procedures, which the involved researchers reached a world-wide acceptance in. From thethematic point of view, the project implies theoretic and experimental studies of advanced metallic materials mainly related to phase equilibria (new phase diagrams will be proposed and the existing will be refined on),characterization of crystal structures of un- and less-known complex phases, electrochemical and catalytic properties of surfaces, and innovations in production of thin layers, coatings, and ribbons. Expected results will be published in stages in relevant scientific journals, used by the involved researchers in educational process,and consulted eventually with industrial partners to consider the transfer of technological findings in praxis. All the involved institutions have a huge experience with the science promotion and are ready to exert it in the project. |
| Duration: | 1.7.2016 – 30.6.2020 |
| MACOMA – Dizajn štruktúry a funkčných vlastností magneticky mäkkých kompozitných materiálov na báze 3-d prechodných kovov | |
| Design of the structure and the functional properties of soft magnetic 3-d transitions metals based composites | |
| Program: | SRDA |
| Project leader: | Ing. Bureš Radovan, CSc. |
| Annotation: | The project focuses on structure and functional properties design of 3-d transition metals based soft magnetic composite materials, in which will be carried out the experimental research of functional properties of advanced materials with heterogeneous structure consisting of isolated ferromagnetic particles. Magnetic micro- and nanocomposite systems will be prepared using advanced powder metallurgy method and current chemical processes. The research will be focused on explanation of the interface influence on the electric, magnetic and mechanical properties investigated magnetic composite materials. Expected results extend the potential for application of advanced soft magnetic materials suitable for use in a medium frequencies, where ferrites are currently used. |
| Duration: | 1.7.2016 – 31.12.2019 |
| Vplyv parametrov laserového zvárania na štruktúru a vlastnosti zvarových spojov moderných ocelí pre automobilový priemysel | |
| Influence of laser welding parameters on microstructure and properties of welded joints of advanced steels for automotive industry | |
| Program: | VEGA |
| Project leader: | Ing. Kepič Ján, PhD. |
| Annotation: | The project is focused on prediction of laser welded joint behaviour at different strain rates. Mentioned simulatedthe real crash tests by creating new and cost-efficient test methods available in the laboratory. The strength anddeformation properties of high-strength steel sheets, laser welded tailored blanks and composites will beinvestigated by tensile, 3-point bending and cyclic bending tests. The measured characteristics of these materialswill be compared with the characteristics of progressive materials such as aluminium alloys and composites. Thethermodynamic calculations will be performed before welding in order to predict phase composition ofpolycomponent welds depending on welding conditions (power, welding rate and focus position). To reach theobjectives the method of design of experiment, experimental tests and numerical simulations based on finiteelements metod will be used. |
| Duration: | 1.1.2016 – 31.12.2018 |
| VIPD – Vplyv intenzívnych plastických deformácií na formovanie štruktúry a vlastnosti progresívnych kompozitných nanomateriálových sústav | |
| Effect of intensive plastic deformations on microstructure and properties of advanced composite nanomaterial systems | |
| Program: | VEGA |
| Project leader: | Ing. Ballóková Beáta, PhD. |
| Annotation: | The project aim is to contribute to the description of deformation behavior and failure mechanisms of materials prepared by intensive plastic deformation especially with regard to interaction of solidified phases withnanocomposite matrix.The basis of the project is the main research in the area of microstructure, substructure and texture changes analysis with the aim of formation of the high-angle nanograins matrix composites based on Mg (AZ61, AZ91,AM60) with various volume ratios of Al2O3 by the intensive plastic deformation process. Focus will be devoted to evaluation of the mechanical properties and “in situ” micromechanisms failures fundamentals.Local mechanical properties, kinetics and mechanism of superplasticity, creep behavior of composites using the method of "small punch", as well as tribological parameters will be tested. Composites based on Al (Al-Al4C3) willbe simultaneosly analysed, too. |
| Duration: | 1.1.2014 – 31.12.2016 |
| Výskum procesov degradácie moderných nanokompozitných multivrstiev v tavenine zlievárenských zliatin hliníka. | |
| Investigation of degradation processes of advanced nanocomposite mutilayers in melt of aluminum foundry alloys. | |
| Program: | VEGA |
| Project leader: | Ing. Jakubéczyová Dagmar, CSc. |
| Annotation: | The objective of the project is to study the partial processes occurring in the interaction of aluminum melt with advanced PVD coatings deposited onto the substrate used for the production of cores for forms and ejectors.There will be analysed the local tribological and mechanical properties of systems melt – coating-substrate depending on the variability of the process of preparation, composition and application as a result of the environmental influence. The main benefits of the project will include the selection and testing of advancedmultilayer and nanocomposite coatings deposited on samples from steels for hot working and testing their resistance in molten aluminum. Preferred features of this steel group coated by optimal types of coatings will pose the combination of properties such as high abrasive wear resistance and superior protection against thermal shocks, which are essential factors influencing lifetime of functional components of forms for metal casting under pressure. |
| Duration: | 1.1.2014 – 31.12.2016 |