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| Zlepšenie oteruvzdornosti povrchu nástrojových ocelí pomocou laserového kalenia v kombinácii s hlbokým kryogénnym spracovaním. | |
| The wear resistance improvement of tool steels surface via the laser hardening in combination with deep cryogenic treatment. | |
| Program: | Bilateral – other |
| Project leader: | Mgr. Petryshynets Ivan, PhD. |
| Annotation: | The main task of the project is to investigate the effect of laser hardening in combination with deep cryogenic treatment on fracture toughness, wear resistance and load – carrying capacity of subsurface region of cold work tool steel and to analyze the modification of microstructural parameters depending on the tool steel type and chemical composition. The experimental materials will be created with three groups of tool steels which are determined for the cold work. The first group will consist of carbon steel with carbon content up to 0.7 wt%, the second groups will be low-alloy steels, and the third group will be the medium alloy steels. These materials will be treated by recommended conventional heat procedures. Subsequently, the materials will be subjected to the treatment by laser beam in order to melting the surface or heating the surface to the selected temperature of austenite as a function of technological parameters of laser hardening and to deep cryogenic treatment in order to remove residual stresses, achieve the transformation of retained austenite and modify the dislocation structure and carbon distribution in the martensitic solid solution. For each material variations, optimal parameters of laser and cryogenic treatments will be defined in order to improve the main mechanical properties of investigated tool steel. |
| Duration: | 6.4.2017 – 31.12.2019 |
| Príprava vláknových laserov s jadrom z transparentnej keramiky a ich využitie na laserovú povrchovú modifikáciu materiálov | |
| Preparation of fiber lasers with a core from transparent ceamics and their use for laser surface modificaion of materials | |
| Program: | Inter-academic agreement |
| Project leader: | Ing. Puchý Viktor, PhD. |
| Duration: | 1.1.2016 – 31.12.2017 |
National
| INNOVATTOOLS – Inovatívne prístupy k zvyšovaniu životnosti a znižovaniu energetickej náročnosti rezných nástrojov pri spracovaní dreva v lesníctve | |
| Innovative approaches to increase the lifetime and reduce the energy consumption of cutting tools in wood processing in forestry | |
| Program: | SRDA |
| Project leader: | RNDr. Džupon Miroslav, PhD. |
| Annotation: | The project will address the issue of the use of methods and procedures for the modification of cutting tools for wood processing in forestry. The result will be an increase in their lifetime and a reduction in emissions and energy consumption of forestry machinery and equipment. The main objects of research will be tools for primary wood processing, modification and processing of forestry biomass for energy purposes, such as splitting and chipping tools, tools for cross-cutting wood, etc. The main task of the project will be the design of procedures and methods for the modification of exposed functional surfaces of the tools. Ensuring a higher quality of functional tool surfaces in the context of reducing friction and eliminating adhesion, provides a prerequisite for reducing the load on machinery equipment and thus reducing emissions and energy consumption in a given production. Analyses will be carried out on the tools – FEM analysis in order to determine the stress-strain state, on the samples analysis of the state of the material in terms of physical properties, microstructure, mechanical properties and resistance to adhesive wear in wood-metal interaction and also abrasive wear. Based on the results of the analyses carried out, innovative surface treatment procedures will be proposed for the exposed functional surfaces to guarantee an increase in their functional lifetime. These will be applied to samples and laboratory tested by relevant test procedures. From the results of the laboratory tests, a selection will be made of the most appropriate non-conventional innovative procedures, which will be applied to the tools and tested on the equipment under forestry operating conditions. In doing so, it will be observed how the modifications in question affect the energy consumption of forestry machinery and equipment. Part of the project solution will be to ensure industrial-legal protection of the original solutions. |
| Duration: | 1.7.2022 – 30.6.2026 |
| 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 |
| DINOMESEM – Vývoj inovatívnych spôsobov spracovania a spájania elektrotechnických ocelí pre vysokoúčinné aplikácie v e-mobilite | |
| Development of innovative methods of processing and joining electrical steels for high-efficiency applications in e-mobility | |
| Program: | SRDA |
| Project leader: | Mgr. Petryshynets Ivan, PhD. |
| Annotation: | The global trend to reduce emissions has forced car producers to think about other types of propulsion thaninternal combustion engines. A significant direction in which the world is currently moving in this area is thereplacement of internal combustion engines with electric car drives. This fact has led and it is still leading to a greatexpansion in the production of car batteries, which would allow the longest possible range of electric cars. Besidesthe capacity of the batteries, the efficient use of stored energy in electric vehicle drives has a significant effect onthe range of cars as well. This project aims to reduce losses and increase the efficiency of electric drives.Increased efficiency and reduced losses can be achieved by reducing the losses in the materials of the rotors andstators of rotating electrical machines, but also by reducing the losses that occur when changing the properties of the source material during cutting and subsequent joining into rotor and stator bundles. Experimental research will focus on optimizing the microstructure and texture of various grades of electrical sheets in order to minimize electromagnetic losses and optimize the conditions for the production of rotor and stator bundles by cutting and subsequent joining. The optimization of the conditions of joining electrical sheets of various chemical and microstructural concepts will be the expected output of the project. The magnetic properties of the joined electrical sheet cut-outs will be compared with the magnetic properties of the lamellas produced by electrospark cutting. |
| Duration: | 1.7.2022 – 31.12.2025 |
| Ino-Clad – Inovatívne prístupy pri obnove funkčných povrchov laserovým naváraním | |
| Innovative approaches to the restoration of functional surfaces by laser weld overlaying | |
| Program: | SRDA |
| Project leader: | RNDr. Džupon Miroslav, PhD. |
| Annotation: | The project is focused on the restoration of functional surfaces by laser weld overlying. Innovative approaches willbe applied in the restoration of functional parts of molds for high-pressure die casting of aluminum alloys. Laserweld overlaying technology will be used for the formation of restoration layers in order to significantly reduce thenegative impact of the introduced heat on the quality of sub-weld layers. Newly designed additional materialsbased on Co, Ni, Fe with the presence of dispersed abrasion-resistant precipitates will be used. Additionalmaterials for laser welding will be used in the form of wires made of Uddeholm Dievar and Maraging. For bettervariability of the chemical composition, powder additives based on Fe with the addition of B, Ti, Nb, Mo, V and Wwill also be used to create weld overlays. The optimal method of heat treatment of weld overlays will be proposed.Research will further focus on microtexturing the surface of molded parts by low-energy laser radiation usinginnovative engraving surface treatment methods (LBT and EBT) in order to ensure a smooth distribution of theseparating agent on the mold surface. Experimental work will be focused on modifying the microgeometry of thesurface of new and renovated shaped parts of molds so that in the phase of "run-in of the mold" a compact layer ofthe separating agent is created to increase the technological life of molds. PVD and PE-CVD technologies will beused for this purpose. |
| Duration: | 1.7.2021 – 30.6.2024 |
| HYBS – Vývoj technológie prípravy povrchových nano-štruktúr nástrojových ocelí novej generácie za účelom zvyšovania kvality lisovania hybridných karosérií automobilov s nízkymi CO2 – emisiami z vysokopevných TRIP – ocelí | |
| Technology development of surface nanostructuring of new generation tool steel for increasing the quality of low CO2 – emission cars hybrid bodies stampung using high – strength TRIP – assisted sheet metal | |
| Program: | SRDA |
| Project leader: | Mgr. Petryshynets Ivan, PhD. |
| Duration: | 1.2.2022 – 31.12.2023 |
| Modelovanie fázových diagramov a termodynamických vlastnosti systémov pre vysoko teplotné aplikácie | |
| Modelling of phase diagram and thermodynamic properties of the systems for high temperature applications | |
| Program: | VEGA |
| Project leader: | RNDr. Homolová Viera, PhD. |
| Annotation: | The project focuses on the study of phases, phase equilibria and phase diagrams in systems forhigh-temperature applications. The aim is to refine the uncertainty of phase diagrams and investigate unknownparts of selected binary systems by experimental methods of differential thermal analysis, X-ray diffraction andelectron microscopy and then to model their phase diagrams and thermodynamic properties using thesemi-empirical Calphad-method. The subject of the study are binary systems with iridium. Iridium is an elementwhich, due to its thermodynamic properties, is very interesting for use in the aerospace industry and due to itshigh corrosion resistance even at very high temperatures, it may potentially be suitable for use as part of gasturbine materials. The results of the project will allow to extend the possibility of designing new materials forhigh-temperature use by computational methods without the need for time-consuming experimental testing. |
| Duration: | 1.1.2021 – 12.12.2023 |
| AdArmy – Prídavná flexibilná balistická nanokompozitná ochrana horných a doných končatín | |
| – | |
| Program: | Other projects |
| Project leader: | Ing. Puchý Viktor, PhD. |
| Duration: | 1.1.2023 – 30.11.2023 |
| Vývoj progresívnych disperzne spevnených kompozitov s kovovou matricou pripravených spekaním pomocou pulzného elektrického prúdu | |
| Development of progressive dispersion-reinforced metal matrix composites prepared by pulsed electric current sintering | |
| Program: | VEGA |
| Project leader: | Ing. Puchý Viktor, PhD. |
| Duration: | 1.1.2020 – 31.12.2022 |
| REDHYBEAR – Výskum a vývoj energeticky úsporného hybridného ložiskového reduktora so zníženým opotrebením pre robotické zariadenia (pre Priemysel 4.0) | |
| Research and development of energy saving hybrid bearing reducer with lowered wear rate for robotic equipment (for Industry 4.0) | |
| Program: | SRDA |
| Project leader: | doc. RNDr. Hvizdoš Pavol, DrSc. |
| Duration: | 1.7.2019 – 30.6.2022 |
| Histes – Vývoj vysoko-legovaných izotrópnych elektro ocelí pre trakčné motory elektromobilov | |
| Development of high-alloy isotropic electrical steels for traction engines of electric vehicles | |
| Program: | SRDA |
| Project leader: | RNDr. Kováč František, CSc. |
| Annotation: | In this project, for the production of high strength electrical steel type “finish”, we aim to propose an original concept of chemical composition and microstructural design with the desirable crystallographic texture which would beprovided a combination of excellent electro-magnetic and high strength properties. The strength properties will be provided by high alloying of steels which are based on substituents elements with Si content from 3 to 3,5 wt.%, Alcontent from 0,5 to 1,5 wt.%, Cu content up to 0,5 wt.%, and P content up 0,10 wt.%. The low value of watt losses and high level of magnetic induction will be achieved by means of coarse-grained columnar or coarse-grained equiaxial microstructure with average grain size in the range from 150 to 300μm and with increased intensity of cube and Goss texture components at the expense of deformation texture. The evolution of the final microstructure will be based on the use of the strain-induced growth of ferrite grains through the thickness of the sheet from itssurface to the central part. At the same time, we want to eliminate the liability to the brittle failure of materials during the cold rolling. It will be realised by optimization of previous thermal deformation exposures in the hot rollingprocess as well as optimization of deformation process of cold rolling with "tailor-made" parameters of rolled steel.The development steel will be used in traction engines of electric vehicles and in high-speed electric motors withhigh requirement for the power. |
| Duration: | 1.7.2019 – 30.6.2022 |
| Prehodnotenie vplyvu intermetalickej fázy na procesy krehnutia žiarupevných ocelí | |
| Re-evaluation of the effect of intermetallic phase on embrittling processes of creep-resistant steels | |
| Program: | VEGA |
| Project leader: | Ing. Falat Ladislav, PhD. |
| Annotation: | The project intention is to investigate the effect of intermetallic Laves phase in thermally exposed 9Cr creep-resistant steels on degradation of their mechanical and brittle-fracture properties. Microstructure evolution aimed at kinetics of precipitation and coarsening of Laves phase will be studied in dependence of the conditionsof initial heat treatment. Apart from comparison of the properties of long-term thermally exposed states (i.e. with presence of Laves phase) with the properties of initial material states without long-term thermal exposition (i.e. without Laves phase), the key task will be the study of the effect of supplemental heat treatment of thermally-exposed states (without notable effect on Laves phase precipitation/coarsening) on potential modification of the properties of creep-resistant steels. The main aim of the project is to re-evaluate and eventually complete up-to now generally accepted opinion on the Laves phase considered as the main embrittling factor in creep-resistant steels. |
| Duration: | 1.1.2019 – 31.12.2021 |
| SEMOD-75 – Nanokompozitný materiál pre balistickú ochranu | |
| Nanocomposite material for balistic protection | |
| Program: | Other projects |
| Project leader: | Ing. Puchý Viktor, PhD. |
| Duration: | 1.5.2019 – 31.8.2021 |
| Termodynamické modelovanie ternárneho systému B-Fe-W a extrapolácia ternárnych dát pre termodynamické výpočty polykomponentných zliatinových systémov | |
| Thermodynamic modelling of the B-Fe-W ternary system and extrapolation of ternary data for thermodynamic calculations of poly-component alloy systems | |
| Program: | VEGA |
| Project leader: | RNDr. Homolová Viera, PhD. |
| Annotation: | The project links to the previous projects dealing with modelling of Fe-B-X (X= V, Cr, C, Mn) ternary systems. It is focused on the study of the phases and phase equilibria in B-Fe-W ternary system. The research results will contribute to the knowledge on the phases existence, their chemical composition, structure and equilibria in thementioned system. The main goal of the project is a creation of reliable parameter database for thermodynamic calculations in B-Fe-W ternary system by Calphad method. This database will contribute to the creation of complex thermodynamic parameter database allowing predictions of phase equilibria for wide range of systems. In the scope of the project, also poly-component alloy systems, mainly creep-resistant steels with boron, will be investigated. The investigation will be focused on phase existence and phase equilibria. For the poly-component materials, phase diagrams will be calculated using the newly-developed thermodynamic databases for ternary systems with boron. |
| Duration: | 1.1.2018 – 31.12.2020 |
| FOROPTIMAT – Výskum vplyvu inovácií postupov výroby na životnosť nástrojov a komponentov lesných mechanizmov | |
| Research on the impact of process innovation on lifespan of forestry machinery tools and components | |
| Program: | SRDA |
| Project leader: | RNDr. Džupon Miroslav, PhD. |
| Annotation: | Project is focused on research on the impact of process innovation on lifespan of forest machines tools and components. During the project it will be elaborated a comprehensive analysis of the current status in using of working tools and components from material and technology points of view. In order to find stress-strain state of tools and components it will be performed FEM analysis. Further, it will be performed state material analysis of specimens to examine their physical and mechanical properties, microstructure characteristic and resistance to abrasive wear. Based on the results of aforementioned analyzes it will be proposed and applied innovative methods of production technology and surface treatments procedures for exposed functional areas in order to increase their function life. In order to comparison the same experimental tests on specimens will be repeated. Based on the results of comparison, it will be carried out selection of optimal innovative procedures. Selected procedures will be applied and tested in the operating conditions of forestry. It is expected that implementation of the results of applied research will increase lifespan of forest machines tools and components thereby reducing their maintenance costs and purchase costs. |
| Duration: | 1.7.2017 – 31.12.2020 |
| Inotech – Využitie inovatívnych technológií obnovy funkčných plôch foriem na výrobu odliatkov pre automobilový priemysel | |
| The utilization of innovative technology for repair functional surfaces of mold casting dies for castings in automotive industry | |
| Program: | SRDA |
| Project leader: | RNDr. Džupon Miroslav, PhD. |
| Annotation: | The project aims at increasing the service life of shaped parts of molds and cores for high pressure die casting (HPDC) of aluminum alloys for the automotive industry. Increasing the service life of casting moulds and dies is achieved using innovative technologies of restoration their functional shape surfaces. For this renovation purpose will be used hard surfacing of functional surfaces of tools in combination with PVD and PE-CVD coatings made of new advanced nanomaterials based on TiAlN, CrAlN and TiB. There will be experimentally verified the effectiveness of local heat exposure of renovated as well as original surface of shaped casting mould to laser as a method of surface pretreatment before deposition thin coatings using PVD or PE CVD technology. The application potential of the project lies in reducing the cost of maintenance moulds and dies, in saving of material resources and also in increasing the productivity and reliability of the process of aluminum castings production. |
| Duration: | 1.7.2017 – 31.12.2020 |
| DevProSteel – Vývoj nekonvenčnej technológie finalného spracovania izotrópnych elektrotechnických ocelí | |
| Unconventional technology development of final processing of isotropic electrical steels | |
| Program: | SRDA |
| Project leader: | RNDr. Kováč František, CSc. |
| Annotation: | The project is focused on the technological process application of the final deformation-thermal treatment of isotropic electrical steels. The proposed process provides the better micro structural and textural parameters of materials. In addition to improvement of the electromagnetic properties, this procedure allows to reduce thecontent of alloying elements Si and Al for the individual quality grades with a positive impact on the shearing properties and thermal conductivity of sheets metal. Our proposed treatment technology will be based on the useof strain induced ferrite grain growth under the influence of gradient of internal deformation stresses and thermal exposure at the final heat treatment of strips and electromotor segments. At the same time the domain structure will be modified on the steel surface by using laser radiation. |
| Duration: | 1.7.2016 – 30.6.2019 |
| Vplyv mikroštruktúry TOO v modifikovaných 9Cr oceliach na porušovanie | |
| Influence of the HAZ microstructure on degradation of modified 9Cr steels | |
| Program: | VEGA |
| Project leader: | RNDr. Ševc Peter, PhD. |
| Annotation: | The project is focused on the study of the processes operating on the microstructure and substructure levels in modified 9Cr steels and their influence on the failure of the material. Its intention is to investigate the interconnections among the microstructure, substructure, secondary phase precipitation and hydrogen environment influence in the individual parts of the weld HAZ during degradation processes. The research results could be used at the degradation evaluation of the experimental materials and their welds in connection with the research group former projects results performed on the real weld joints from the view of their sensitivity to the failure during the thermal and mechanical straining. |
| Duration: | 1.1.2016 – 31.12.2018 |
| 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 |
| Termodynamická analýza a modelovanie fázového diagramu ternárneho systému Fe-B-Mn a verifikácia databázy pre termodynamické výpočty komplexných systémov experimentálnou analýzou zliatin typu Fe-B-X-Y (X, Y=V, Cr, C, Mn). | |
| Thermodynamic analysis and modelling of phase diagram for Fe-B-Mn ternary system and verification database for thermodynamic calculations of complex systems by experimental analysis of Fe-B-X-Y (X,Y=V, Cr, C, Mn) alloys. | |
| Program: | VEGA |
| Project leader: | RNDr. Homolová Viera, PhD. |
| Annotation: | The project links to the previous projects dealing with modelling of Fe-B-X (X= V, Cr, C) ternary systems. It is focused on the study of the phases and phase eqiulibria in Fe-B-Mn ternary system. The research results contribute to the knowledge on phases existence, their chemical composition, structure and eqiulibria in the mentioned system. The main goal of the project is creation reliable parameter database for thermodynamic calculations in Fe-B-Mn ternary system by Calphad method. This database contributes to the creation of complex thermodynamic parameter database allowing more exact phase equilibria predictions for wide range of systems.Another task of the project is the experimental investigation of quaternary alloys of the Fe-B-X-Y (X, Y=V, Cr, C, Mn) type which will be used for the verification of our complex database. The complex database will be createdby merging of the databases of the Fe-B-Mn system, Fe-B-X (X= V, Cr, C) ternary systems and other existing databases. |
| Duration: | 1.1.2015 – 31.12.2017 |
| Modifikácia štruktúr teplom-ovplyvnenej oblasti zvarových spojov moderných 9Cr feritických žiarupevných ocelí s bórom za účelom zlepšenia ich creepovej odolnosti a húževnatosti | |
| Modification of the heat-affected zone microstructures of welded joints of advanced 9Cr ferritic creep-resistant steels with boron for the purpose of their creep-resistance and toughness improvement | |
| Program: | VEGA |
| Project leader: | Ing. Falat Ladislav, PhD. |
| Annotation: | Ferritic 9Cr creep-resistant steels are used in energy industry for the construction of highly efficient supercritical boilers. The problems during creep of welded joints of these steels include degradation of their properties and premature type IV failure in heat-affected zone (HAZ). The most recent research results worldwide indicate the possibility of solution of mentioned problems by boron alloying which effect is not completely understood. The aim of present project is to study the boron effect in base materials and the influence of post-weld heat treatment on the HAZ microstructures and properties modification. Different HAZ microstructural states will be prepared by simulation heat treatment and thermophysical simulation of base materials. The individual material states will be characterised with respect to their microstructure and phase stability supported by thermodynamic modelling using Calphad method and also with regard to their mechanical properties and creep resistance. |
| Duration: | 1.1.2013 – 31.12.2015 |
| Termodynamický opis systémov B-Cr a Fe-B-Cr | |
| Thermodynamic description of B-Cr and Fe-B-Cr systems | |
| Program: | VEGA |
| Project leader: | RNDr. Homolová Viera, PhD. |
| Annotation: | The project connects with the project:"Thermodynamic analysis of binary and ternary systems with boron" and deals with study of phases and phase equlibria in Fe-B-Cr system and in B-Cr subsystem. Main goal of the project is the development of reliable database of parameters for thermodynamic calculations for Fe-B-Cr ternary system and the extension of knowledge on the existence of chromium borides, their chemical composition, structures and phase equilibria in the investigated systems. This system is one of subsystems of complex steels containing boron, including white iron, austenitic stainless steels, hard layers, number of soft magnetic alloys etc. The new-created database contributes to the development and reassessment of extensive database of thermodynamic parameters for prediction of phase equilibria for wide range of systems. Achieved data alow the application of thermodynamic and kinetic modelling at the study and development of new materials, as well. |
| Duration: | 1.1.2012 – 31.12.2014 |
| Degradácia a porušovanie heterogénnych zvarových spojov P92/316H s prídavným materiálom na báze Ni | |
| Degradation and filure of dissimilar weld joints P92/312H with Ni-based filler metal | |
| Program: | VEGA |
| Project leader: | Ing. Výrostková Anna, CSc. |
| Annotation: | Description of microstructure degradation and failure mechanism of dissimilar weld joints ferrite/Ni-base filler metal/austenite in creep conditions after two kinds of PWHT. Detailed study of interfacial localities. Thermodynamic and kinetic modelling of the microstructure evolution. |
| Duration: | 1.1.2010 – 31.12.2012 |
| Technológia prípravy elektrotechnických ocelí s vysokou permeabilitou určených pre elektromotory s vyššou účinnosťou | |
| Technology of preparation of electrotechnical steels possessing high permeability for high affectivity electromotors. | |
| Program: | EU Structural Funds Research & Development |
| Project leader: | RNDr. Kováč František, CSc. |
| Annotation: | The project is focused on oriented research and development of progressive electrotechnical steel possessing goal-directed microstructures, textures and substructures parameters that provide excellent application properties. The application is aimed on high efficient electrical gears used in electrotechnical, energetic and automobile industry areas. This bears a great importance not only on Slovak Republic but in whole Europe Union scale. Within connection with knowledge transfer to economic area, an increase of produced product quality is expected. The quality improvement could be achieved at recent or even lower production costs that will lead to increasing of product competitiveness. |
| Duration: | 1.1.2010 – 30.6.2012 |
| Termodynamický opis systémov B-C a Fe-B-C | |
| Thermodynamic description of the B-C and Fe-B-C systems | |
| Program: | VEGA |
| Project leader: | RNDr. Homolová Viera, PhD. |
| Annotation: | The project knots on project: ” Thermodynamic analysis of binary and ternary systems with boron”, and deals with study of phase and phase equilibria in the Fe-B-C system and in B-C subsystem. It contributes to the extension of knowledge about existence of stable and metastable phases (borides, borcarbides, carbides of boron), their chemical compositions, structures and phase equilibria in the investigated systems. The main goal of the project is development of reliable database of parameters for thermodynamic calculations for Fe-B-C ternary system, which is subsystem of all steel containing of boron and also subsystem of some amorphous magnetic materials. The new-created database contributes to the development of extensive database of thermodynamic parameters for prediction of phase equilibria for wide range of systems. Acquired data will have wide application for thermodynamic and kinetic modelling at the study and development of new materials. |
| Duration: | 1.1.2009 – 31.12.2011 |
| MOTES – Modelovanie ternárneho systému Fe-B-C a termálne krehnutie-príspevok k štúdiu Cr-Mo ocelí | |
| Modelling of Fe-B-C ternary system and thermal embrittlement –contribution to Cr-Mo steel study | |
| Program: | SRDA |
| Project leader: | Ing. Výrostková Anna, CSc. |
| Annotation: | Re-evaluation and completion of thermodynamic database for Fe-B-C ternary system using CALPHAD method. Evaluation of Cr-Mo steels sensitivity to thermal embrittlement. |
| Duration: | 1.1.2009 – 31.12.2010 |
| Vplyv parametrov žíhania na mikroštruktúru a vlastnosti heterogénnych zvarových spojov a ohybov progresívnych ocelí | |
| Influence of annealing parameters on the microstructure and heterogene ous weld joints and bends of progressive streels | |
| Program: | VEGA |
| Project leader: | Ing. Výrostková Anna, CSc. |
| Annotation: | The project deals with the influence of the cold deformation and annealing of bends on precipitation processes in new, advanced martesitic steels of P92 and E911 grades and in heterogeneous weld joints P92, E911 – TP 347 H (stabilized austenitic steel). The steels and welds have been planned for the construction of USCB-ultra-super-critical-boilers. Joints will be prepared at various technology conditions (weld metal, heat input) with two approaches of the post weld heat treatment (PWHT), namely: austenitization+tempering and tempering without austenitization. On the base of the microstructural evaluation, calculations of residual stresses, and results of mechanical tests (hardness, tensile tests at 20 adn 600°C, short trem crep test) the possibility of the omission of austenitization will be judged, that could result in decisive economical effect – energy savings and avoiding using of a large furnace for the treatmet at the temperatures above 1000°C. Experimental assesment of phase composition and thermodynamic calculations of equilibrium phases enable the investigated steels phase evolution diagrams constuction. The study of the influence of deformation on precipitation of phases in tube bends in relationship with the heat treatment used and resulted property changes is the second scope of the project, aimed to the HT optimization. |
| Duration: | 1.1.2007 – 31.12.2009 |
| APVV99-045105 – Zvariteľnosť žiarupevných ocelí novej generácieí pre energetické celky s vyššou účinnosťou | |
| Weldability of new generation creep steels for high efficiency power plant units | |
| Program: | SRDA |
| Project leader: | Ing. Výrostková Anna, CSc. |
| Annotation: | The project is focussed on the study of new creep strength steels weldability and possibilities of their application. It is devided in three tasks (ČÚ). The first one is devoted to the question of weldability and welding of new creep strength steels, the second deals with the study of residual stresses evolution during the production and repair of energy components. The last task deals with the mechanisms of cracking of the weld joints of the new generation. The result of ČÚ 1 will be a proposal of suitable heterogeneous weld combinations to be used in innovated energy units. ČÚ 2 will lead to the suggestion of the welding technology and selection of filler metals ensuring minimal level of residual stresses during the production and repair of energy units, respectivelly. The mechanism of cracks originating in weld joints in the service at supercritical conditions will be a result of the ČÚ 3. |
| Duration: | 1.5.2006 – 30.9.2009 |
| Termodynamická analýza binárnych a ternárnych systémov s bórom | |
| Thermodynamic analysis of binary and ternary systems with boron | |
| Program: | VEGA |
| Project leader: | RNDr. Homolová Viera, PhD. |
| Annotation: | The scientific project is oriented to extension of knowledge about influence of boron on formation and development of phases. The using of boron as an alloying element in alloys for different proposes has had an increasing tendency. In the proposed project the systems B-V and Fe-B-V will be studied, in which vanadium as a strong boride-forming element forms stabile borides with high melting temperatures, high hardness, and wear resistance. Main aim of the project is to develop the set of thermodynamic data on the base the experimental and theoretical study of phase and phase equilibria, allowing to calculate phase equilibria and phase diagrams for the investigated systems. It contributes to the development of extensive database of thermodynamic data for prediction of phase equilibria for wide range of systems. Acquired data will have wide application for thermodynamic and kinetic modelling at the study and development of materials. |
| Duration: | 1.1.2006 – 31.12.2008 |
| AddArmy – Prídavná flexibilná balistická nanokompozitná ochrana horných a dolných končatín | |
| – | |
| Program: | Other projects |
| Project leader: | Ing. Puchý Viktor, PhD. |
| Duration: | 1.3.2023 – 0.0.0000 |