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Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 54
Hanzl, Pavel , Zetková, Ivana , Daňa, Milan , Nozar, Martin
Advanced Simulation of Metal Additive Manufacturing Using Maraging Steel and Nickel Alloy

The melting of metal powder by a laser beam is a complex physical metallurgical process and successful processing of the whole Metal Additive Manufacturing (MAM) procedure requires complex management. Therefore, a successful result is not guaranteed. The print job is designed based on&#...

Haviar, Stanislav , Kozák, Tomáš , Meindlhumer, Michael , Zítek, Michal , Opatová, Kateřina , Kučerová, Ludmila , Keckes, Jozef , Zeman, Petr
Nanoindentation and microbending analyses of glassy and crystalline Zr(–Hf)–Cu thin-film alloys

Nanoindentation and microbending testing were used to investigate the mechanical properties of Zr(‒Hf)‒Cu thin-film alloys prepared by nonreactive magnetron co-sputtering. A detailed analysis of nanoindentation data and microscopic images of indents allowed a more precise determination of the effective...

Peković, Michal , Jirková, Hana , Rubešová, Kateřina , Janda, Tomáš , Bureš, Radovan
Microstructural Evolution in 42SiCr Steel in a High-Temperature Chamber Under Microscope Objective

Thanks to today’s computer programs, engineers can derive a large amount of information from chemical com-position of a material. This information includes phase transformation temperatures Ac1, Ac3, Ms and Mf. CCT and TTT diagrams for austenite decomposition can be determined as well. ...

Khalaj, Omid , Siabil, Seyed Mohammad A. Ghotbi , Azizian, Mehran , Tafreshi, Seyed Naser Moghaddas , Mašek, Bohuslav , Kepka, Miloslav , Kavalír, Tomáš , Křížek, Michal , Jirková, Hana
Experimental and numerical investigation of expanded polystyrene (EPS) geofoam samples under monotonic loading

The recent increase in the use of Expanded Polystyrene (EPS) geofoam in construction and geotechnical projects has driven researchers to investigate its behavior, more deeply. In this paper, a series of experimental tests to investigate the stress-strain behavior and the mechanical propertie...

Jeníček, Štěpán , Vorel, Ivan , Peković, Michal
Identification of the virgin martensite in quenched microstructures of new generation of forging steels with higher silicon content using colour etching

Observation and identification of phase transformations of austenite during isothermal bainitic processing, Q-P heat treatment or quenching and tempering is often quite a tricky task. The reason is that obtained microstructures are typically very fine with insufficient contrast of various structu...

Bureš, Martin , Zetek, Miroslav
Application of laser surface polishing on additive manufactured parts of Inconel 718 nickel-based superalloy

This article deals with the influence of laser polishing parameters on the final surface quality of nickel-based superalloy Inconel 718 produced by metal additive manufacturing. The aim is to optimize the laser polishing process parameters to reduce the surface roughness of the sample.&...

Kučerová, Ludmila , Hájek, Jiří , Vítek, Jan
The Effect of Cryogenic Treatment on Mechanical Properties, Wear and Corrosion Resistance of Aluminium Alloy AW7075

Effect of addition of cryogenic treatment to a standard heat treatment of aluminium alloy AW 7075 was tested in this work. Used heat treatment consisted of solution annealing at 470 °C for two hours and precipitation aging treatment at 130°C for 14 hours, 120 °C for ...

Valíček, Jan , Harničárová, Marta , Řehoř, Jan , Kušnerová, Milena , Gombár, Miroslav , Drbúl, Mário , Šajgalík, Michal , Filipenský, Jan , Fulemová, Jaroslava , Vagaská, Alena
Prediction of Cutting Parameters of HVOF-Sprayed Stellite 6

In this research, the authors set out to propose a new method of predicting and adjusting the main cutting parameters of chip machining, namely spraying on the substrate. In the experiments, a total of 28 turning cuts on a Stellite 6 coating layer were realized. The ...

Bícová, Kateřina , Kubátová, Dana
Contribution to the evaluate the suitability of the measuring equipment

This paper deals with the issue of verifying the suitability of measuring equipment, as meters used in production must meet the required degree of accuracy. However, there are several approaches to measuring and evaluating measuring systems. This paper focuses on measuring the suitabili...

Khalaj, Omid , Azizian, Mehran , Darabi, Naser Joz , Tafreshi, Seyed Naser Moghaddas , Jirková, Hana
The Role of Expanded Polystyrene and Geocell in Enhancing the Behavior of Buried HDPE Pipes under Trench Loading Using Numerical Analyses

In recent years, much research has focused on the use of various materials for relieving and strengthening soil, e.g. steel reinforcing ribs, geosynthetics, geocells, waste tires and expanded polystyrene (EPS). EPS is being used more and more in geo-infrastructures, being a super-light ...

Vychytil, Jan , Špirk, Stanislav
Numerical analysis of passenger kinematics and injury risks during a railway vehicle collision: The effect of safety belts

The aim of this paper is to contribute to investigation of passive safety of passengers in railway vehicles using numerical simulations. At first, a typical interior of a railway vehicle is created in the Virtual Performance Solution software. It includes finite element models of&#...

Kučerová, Ludmila , Zetková, Ivana , Jeníček, Štěpán , Burdová, Karolína
Hybrid parts produced by deposition of 18Ni300 maraging steel viaselective laser melting on forged and heat treated advanced high strength steel

Sika, Jiří , Křížek, Michal
Modelling of noise propagation in enclosures

Heller, Petr , Žlebek, Stanislav , Krsička, Tomáš
Nestandardní úzkorozchodný tramvajový podvozek

Khalaj, Omid , Saebnoori, Ehsan , Chocholatý, Ondřej , Jirková, Hana , Svoboda, Jiří
High Temperature and Corrosion Properties of A Newly Developed Fe-Al-O Based OPH Alloy

Opatová, Kateřina , Zetková, Ivana , Kučerová, Ludmila
Relationship between the size and inner structure of particles of virgin and re-used MS1 maraging steel powder for additive manufacturing

Kepka, Miloslav , Kepka, Miloslav , Džugan, Jan , Konopík, Pavel
Practical notes for assessing the fatigue life of bodyworks of buses and trolleybuses

Habrman, Martin , Ráž, Karel , Kalina, Tomáš
Effect of the Cascade Injection Molding on the Filling Behaviour

This paper deals with different ways of injection molding. A plastic part can be generally filled many ways. Use of more than one gate is common in a plastic industry. Cascade molding can affect the final properties of the product, especially by the number of gates, ...

Hajšman, Jan , Jeníček, Štěpán , Kučerová, Ludmila , Rieger, David
Microstructure and properties of polymer composites

This work aimed to characterise microstructure and mechanical properties of polymer composite samples. The main task was to adapt the well-known techniques of metallography (i.e. sample preparation and microscopic examination) to documentation of multi-component polymer materials and to optimize the&#...

Kalina, Tomáš , Marek, Václav
Development of the new generation of clamping jaws for thermomechanical simulator

This paper presents a development and design of new multifunctional clamping jaws for thermomechanical simulator. In the article there is presented what the thermomechanical simulator is and what is it used for. The article also describes the requirements for the thermomechanical simulator&#...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 54