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| Dizajn topografie povrchov nástrojov z WC-Co s aplikovanými PVD povlakmi | |
| Design surface topography tools from the WC-Co applied PVD coating | |
| Program: | VEGA |
| Project leader: | Ing. Jakubéczyová Dagmar, CSc. |
| Annotation: | The aim of the project is to solve the partial role of the optimization process of Ni-super alloys used in the aircraft industry, specifically in jet engines. In the machining of Ni-superalloys, a high thermal and mechanical load occurs in the active area of the tool, reducing its lifetime and decreasing production efficiency. The challenge is the design and experimental verification of the new surface texture design of the active parts of the machining tool from WC-Co, the laser pre-treatment technology and the PVD coating of the 4th generation. Surface topography of the active part of the instrument will be modified by impulse laser radiation with controlled energy density and controlled area distribution of the heat exposed areas. The resulting surface of the active part of the tool will contain microcraters at the desired depth profile positions. The output will be an innovated texture of the tool surface in order to make machining of special nickel superalloys more effective – Inconel 713, resp. 718. |
| Duration: | 1.1.2020 – 31.12.2022 |
| Dizajn mikroštruktúry a subštruktúry elektroocelí pre náročné aplikácie v pohonoch elektromobilov | |
| The microstructural and substructural design of electrical steels for demanding applications in the electrical cars drives. | |
| Program: | VEGA |
| Project leader: | Mgr. Petryshynets Ivan, PhD. |
| Annotation: | The project is focused on the microstructural and substructural design of high-strength electrical steels intended for rotors and stators of traction motors for electricalcars and cars with hybrid drive. In frame of present project the research will be focused on the design and preparation of high-strength dynamo steels with good strength as well as the magnetic properties. The proposed steel will be designed so that its microstructure and texture parameters show the low watt loss under load in high magnetic fields and mechanical strength provide by ultra-fine precipitates (up to 50nm) or clusters of selected elements based on FeTiP particles responds to the requirements for the extreme mechanical and fatigue loads of the rotor at sudden braking or pulling acceleration. To achieve the selected composite system a sequence of structure creation will be designed and implemented. |
| Duration: | 1.1.2018 – 31.12.2020 |
| Výskum systémov duplexných nanokompozitných PVD povlakov s laserom modifikovaným podkladovým materiálom pre aplikácie tlakového liatia kovov. | |
| Research of systems of duplex nanocomposite PVD coatings with laser – modified base material intended for pressure mould cast applications. | |
| Program: | VEGA |
| Project leader: | Ing. Jakubéczyová Dagmar, CSc. |
| Annotation: | The goal of the project is the development of an innovative process of surface treatment of tools and parts of moulds for pressure metal casting. The process involves laser heating of tool surface which takes place after the final thermal treatment, and subsequent depositing of duplex PVD coating. The contribution of the project willconsist in testing the nanocomposite PVD coatings deposited to specimens from steel intended for hotapplications, subjected to laser treatment before coating and testing their mechanical,tribological and chemical properties at interaction of molten aluminium with the mould material. By treatment of these materials / machine parts by laser in combination with duplex PVD coating the following properties will be achieved: high resistance towear and excellent resistance to thermal shocks which are the factors affecting service life of functional parts of moulds used for for pressure casting, and of mould cavities. |
| Duration: | 1.1.2017 – 31.12.2019 |
| Účinok chemického zloženia a mikroštruktúry na náchylnosť dvojfázových ocelí ku vodíkovému krehnutiu | |
| Effect of chemical composition and microstructure on the susceptibility of dual phase steels to hydrogen embrittlement | |
| Program: | VEGA |
| Project leader: | doc. Ing. Rosenberg Gejza, CSc. |
| Annotation: | The project is aimed at research of hydrogen embrittlement (HE) of advanced high strength steels for automotive industry. The experimental program is primarily aimed at dual-phase steels. The effect of HE on strain and fracture properties of these steels will be studied in dependence on various microstructural characteristics (grain size, volume fracture, size and morphology of martensite, …). The aim of this project is to determine also the resistance of the steels against HE in different areas along the thickness of sheet (focused on the area of structural heterogeneities). Therefore, the experiments will be also conducted on miniature samples. Degradation effect of hydrogen will be examined mainly on samples with stress concentrator, which will be exposed to diverse regimes of loading (static, impact and cyclical loading). The development of local strains and size of plastic zone at cracks tip will be examined with metalography-fractography analysis and using parameters of fracture mechanics (KIC, COD,..). |
| Duration: | 1.1.2015 – 31.12.2017 |
| APONAZEP – Aplikácia progresívnych povlakov nástrojov pre zvýšenie efektívnosti a produktivity lisovania plechov z moderne koncipovaných materiálov | |
| Application of progressive tool coatings for increasing the effectiveness and productivity of forming sheets made of modern materials | |
| Program: | SRDA |
| Project leader: | RNDr. Džupon Miroslav, PhD. |
| Annotation: | Project solves problems of forming process optimisation and increasing of forming dies lifetime by application of thin coatings to die´s contact surfaces and researches interaction of tribologic pair die surface-sheet surface.Within the project will be researched coated steel sheets (galvanized, tin) as well as aluminium alloys sheets used in automotive and consumers industry. Tribologic system die surface-sheet surface will be researched from the view their surface topology, adhesive and abrasive wearing and deformation and failure mechanisms of die and sheet coatings. Research of active die parts will be focused to coating-die material system in initial state, after deposition conventionial coating based on Ti-Al-N and after deposition new composite coatings based on TiN, TiCN and TiAlN.These coating will be researched before and mechanical loading and after working condition simulation. Modern experimental techniques will be used to diagnose system coating-die material degradation under known qualitative stress distribution in analysed area. Experimentally measurable strength and structural parameters of coating-die material will be identified, that have dominant influence to processed sheets surface quality and die´s lifetime. Wearing tests laboratory results of coatings will be correlated to results of forming dies coatings loading under industial and semi-industrial conditions. |
| Duration: | 1.7.2012 – 30.6.2015 |
| Hodnotenie deformačných a lomových vlastností dvojfázových ocelí prostredníctvom miniatúrnych vzoriek | |
| Evaluation of strain and fracture properties of dual-phase steels on miniature samples. | |
| Program: | VEGA |
| Project leader: | doc. Ing. Rosenberg Gejza, CSc. |
| Annotation: | The project is aimed at research of the effect of various microstructural characteristics (feritte grain size, volume percentage, distribution morphology, percentage of carbon in martensite) on deformation and fracture properties of dual-phase steels. Experiments will be mostly conducted on miniature samples (with and without stress concentrator) which enable us to evaluate the local properties of structural heterogeneities across the thickness of the sheet. The main goal of the project is to evaluate interactive effect of structure/thickness of sheet and evaluate the effect of structure on strain and fracture properties of dual-phase steels which were exposed to different regimes of loading (static, impact, cyclical loading). Development of local strain and size of plastic zone at cracks tip will be examined by metalography-fractography analysis. The parameters of elastic and elastic-plastic fracture mechanics will be used to evaluate the particular stages of damage, as well as failure of samples. |
| Duration: | 1.1.2012 – 31.12.2014 |
| Kovové biomateriály pripravené práškovými technológiami | |
| Metallic biomaterials prepared by powder-processing techniques | |
| Program: | VEGA |
| Project leader: | RNDr. Kupková Miriam, CSc. |
| Duration: | 1.1.2012 – 31.12.2014 |
| Únavové vlastnosti nízkouhlíkových ultra vysokopevných pokrokových ocelí | |
| Fatigue properties of low carbon advanced ultrahigh strength steels | |
| Program: | VEGA |
| Project leader: | doc. Ing. Rosenberg Gejza, CSc. |
| Annotation: | This project is oriented on the development of new low carbon without any silicon addition ultra-high-strength multiphase steels that belong to the group of Advanced high strength steels which are primary designated for automotive industry. The objective of project is to appreciate the measure of effect of chemical composition, of mode of thermomechanically controlled forming and cooling, of combined effect of cold rolling with selected ways of heat treatments on microstructure, mechanical and fatigue properties. The influence of variously processing regimes of steels on activation of the individual strengthening mechanisms and of the level localized plastic deformation at failure will be investigated by use of grid strain analysis method and measuring of the plastic zone size ahead crack-tips or notch root. The main objective of this project is focused on the optimization of microstructure for purpose of achieving the trade-off balance between strength-ductility and fatigue properties of multiphase steels. |
| Duration: | 1.1.2009 – 31.12.2011 |
| Výroba, štruktúra a vlastnosti kompozitov s kovovou matricou, pripravených z povlakovaných, nanoštruktúrnych alebo amorfných surovín. | |
| Processing, structure and properties of metal matrix composites originating from coated, nanostructured or amorphous raw materials | |
| Program: | VEGA |
| Project leader: | RNDr. Kupková Miriam, CSc. |
| Annotation: | The project deals with metal matrix composites made by powder metallurgy from coated, nanostructured or amorphous materials. Metals with nanostructured or amorphous reinforcements represent a relatively new and yet poorly understood class of materials. The project is oriented on fundamentals rather than on a specific composite development. The aim is to answer the questions: How is the powder-mass\’ behavior related to properties of individual coated, nanostructured or amorphous particles? What are the fundamental processes during compaction and sintering of such powders and how do they affect the product’s microstructure? What are the basic links between microstructure and macroscopic properties of metals with coated, nanostructured or amorphous reinforcements?Both experimental and theoretical means will be used to reach the project goals. Experiments combined with a theoretical study of model systems should contribute to the understanding of properties and potential of a given class of materials. |
| Duration: | 1.1.2009 – 31.12.2011 |
| DMKO – Dizajn moderne koncipovaných ocelí na základe charakteristík lisovateľnosti | |
| Design of advanced conceived steels based on pressability characteristics | |
| Program: | SRDA |
| Project leader: | RNDr. Džupon Miroslav, PhD. |
| Annotation: | The aim of the project is the derivation of predicting relations between pressability characteristics (boundary drawing ratio, IE, FLD) and microstructure parameters, creating of model maps of applications of advanced sorts of sheets from low-carbon steels and knowledge expansion about deformation mechanisms of particular phases of galvanized steel sheets with pure zinc coatings and Fe-Zn coatings. Limiting conditions of deformation, friction, wear, eventually coating destruction in relation to characteristics of technological processing by pressing of progressive materials will be defined. The project deals with optimization of multiphase steels microstructure and knowledge expansion about zinc coatings of advanced conceived steel sheets acording to characteristics of technological pressability. |
| Duration: | 1.2.2007 – 30.6.2010 |
| Vývoj progresívnych ocelí pre automobilový priemysel | |
| Development of advanced steels for automotive industry | |
| Program: | SRDA |
| Project leader: | Prof.Ing. Parilák Ľudovít, CSc. |
| Duration: | 1.1.2006 – 1.12.2008 |