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Conference Proceedings - METAL 2014
23rd International Conference on Metallurgy and Materials
May 21 - 23, 2014 / Hotel Voronez I, Brno, Czech Republic, EU
www.metalconference.eu
ISSN: 2694-9296
ISBN: 978-80-87294-52-9
Proceedings of the conference were published in Web of Science and Scopus.
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HORNÍK Jakub Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Material engineering, Prague, Czech Republic, jakub.hornik@fs.cvut.cz, petr.zuna@fs.cvut.cz, jardamalek@seznam.cz, tomasjetmar@seznam.cz
Co-authors:
ZUNA Petr
JANDOŠ František
MÁLEK Jaroslav
JETMAR Tomáš
Abstract:
The paper deals with the problematic of weakening of the original austenite grain boundaries which often takes place during the processing of heavy forgings. This phenomenon occurs predominantly in regions of locally coarsened grains during the long dwell times at temperatures of forging or primary heat treatment and can cause development of intercrystalline fracture even before the final heat treatment of forgings. [..]
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ARLAZAROV Artem ArcelorMittal Research and Development, Maizières-lès-Metz Cedex France, EU
Co-authors:
LUJAN BROLLO Gabriela
MAGAR C.
Abstract:
The influence of relatively high heating rates (100 - 300°C/s) and low soaking times (5s) on the microstructure and mechanical properties of a cold rolled low carbon steel was studied. Annealing treatments with different heating rates were performed on a 0.15C - 1.2Mn (wt.%) steel in order to study recrystallization, austenite transformation and growth of ferrite and austenite. [..]
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BUBLÍKOVÁ Dagmar University of West Bohemia, FORTECH - Research Centre of Forming Technology, Pilsen, Czech Republic, EU
Co-authors:
KUČEROVÁ Ludmila
JIRKOVÁ Hana
MAŠEK Bohuslav
Abstract:
Several innovative methods of heat and thermo-mechanical treatment have been recently developed to improve mechanical properties of high strength low alloyed steels. On the base of the experience obtained during the development of TRIP (transformation induced plasticity) steels, other methods have been proposed which also use positive effect of multiphase microstructure with controlled amount of retained austenite to achieve excellent strength to ductility ratios. [..]
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PINTO DA SILVA Elisabete Dept. of Materials Science and Engineering, Ghent University, Belgium, EU
Co-authors:
XU Wei
FÖJER Cecilia
BLIZNUK Vitaliy
HOUBAERT Yvan
SIETSMA Jilt
PETROV Roumen
Abstract:
The microstructural evolution of a low-carbon steel has been studied during the austenite decomposition, subsequent to initial martensite formation. Isothermal holding treatments after rapid cooling to various temperatures between martensite start (Ms) and martensite finish (Mf) temperatures were carried out in a dilatometer with the intention to form controlled volume fractions of initial martensite and austenite. [..]
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JANDOVÁ Dagmar VZÚ Plzeň s.r.o., Pilsen, Czech Republic, EU
Co-authors:
GAJDOŠ Ľubomír
ŠPERL Martin
KAISER Jaroslav
Abstract:
Changes in dislocation substructure were studied in solution annealed S235JR steel in relation to the number of symmetrical reversed stress cycles with the amplitude σa = 242 MPa and corresponding mean life Nf = 17 950 cycles. The microstructure of the steel consisted of ferrite with a small amount of pearlite. [..]
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GAVENDOVÁ Petra Brno University of Technology, Faculty of Mechanical Engineering, Institute of Materials Science and Engineering, Brno, Czech Republic, EU, gavendova@fme.vutbr.cz
Co-authors:
PETRYSHYNETS Ivan
SOPKO Martin
KOVÁČ František
Abstract:
An investigation of the dependence of grains hardness on their orientation in electrical steel is presented in the present work. The study was performed by means of nanoindentation experiments using Nanoindenter G200 with the calibrated Berkovich indenter. [..]
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VOLODARSKAJA Anastasia VSB - Technical University of Ostrava, Ostrava, Czech Republic, EU, anastasia.volodarskaja@vsb.cz
Co-authors:
MIKLUŠOVÁ Šárka
HOLEŠINSKÝ Jan
VODÁREK Vlastimil
ŽÁČEK Ondřej
Abstract:
Magnetic properties (easy magnetisation, low hysteresis losses) of grain oriented electrical steels (GOES) depend strongly on the sharpness of the Goss texture ({110}<001>). It is expected that the perfection of the Goss texture in final sheets is significantly affected by structural inheritance during the industrial production process. [..]
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RAUDENSKÝ Miroslav Brno University of Technology, Heat Transfer and Fluid Flow Laboratory, Brno, Czech Republic, EU, raudensky@fme.vutbr.cz
Co-authors:
CHABIČOVSKÝ Martin
HRABOVSKÝ Jozef
Abstract:
Oxidation is inherent part of steel production and heat treatment. The most common impact of the oxide scale layers is on the surface quality and material losses during steel processing. [..]
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ŽALUDOVÁ Monika VSB-TUO, Faculty of Metallurgy and Materials Engineering (FMME), Ostrava, Czech Republic, EU, monika.zaludova@vsb.cz
Co-authors:
SMETANA Bedřich
ZLÁ Simona
DOBROVSKÁ Jana
ROSYPALOVÁ Silvie
KALUP Aleš
MICHALEK Karel
Abstract:
Heat capacity of steels is one of the crucial thermophysical parameters used for process behaviour prediction in many applications. Heat capacity is an input variable for many thermodynamical and kinetic programs. [..]
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JONŠTA Petr VÍTKOVICE HEAVY MACHINERY a. s., Ostrava, Czech Republic, EU, petr.jonsta@vitkovice.cz
Co-authors:
MACHOVČÁK Pavel
SUŠOVSKÝ Michal
TREFIL Antonín
BROŽOVÁ Silvie
DRÁPALA Jaromír
Abstract:
The manufacturing program of the company VÍTKOVICE HEAVY MACHINERY a.s. comprises production of a wide range of structural steels for the high exposed machine parts, such as shafts of wind power stations, turbine shafts, gears, etc. [..]
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OSTROUSHKO Dmytro SB-Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Ostrava, Czech Republic, EU, dimitrij.o@seznam.cz, emazancova@vsb.cz
Co-authors:
MAZANCOVA Eva
SAKSL Karol
Milkovič Ondrej
Abstract:
Surface coatings protection is one of the most important processes ensuring efficient and economic use of basic materials, mostly of lower-quality. At interface of clad and basic material intermetallic phases are formed, representing quite different matrix with dissimilar properties unlike the welded materials. [..]
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LASEK Stanislav VSB-Technical University of Ostrava, Ostrava, Czech Republic, EU, stanislav.lasek@vsb.cz, eva.mazancova@vsb.cz
Co-authors:
MAZANCOVÁ Eva
Abstract:
Austenitic steels with 20-30 % Mn, and 5-10 % Al have a high level of toughness and ductility in comparison to carbon steels, used for construction of vehicles. The corrosion behavior of those steels can be negatively affected by a high manganese content, which is electrochemically non-noble element and supports certain types of localized corrosion. [..]
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LAZAROVA Tsvetelina University of Chemical Technology and Metallurgy, Sofia, Bulgaria, EU, tsveti26@yahoo.com
Co-authors:
YORDANOVA Rozina
ANGELOVA Donka
Abstract:
Fatigue in stainless steel-candidates for hydrogen storage and infrastructure is described mathematically at different loading conditions. The investigated steels are: SUS304, SUS316 SUS316L and SUS405.
All the tests are carried out under tension-compression fatigue at different loads and a stress ratio R= −1. [..]
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FAJKOŠ Rostislav BONATRANS GROUP a.s., Bohumín, Czech Republic, EU
Co-authors:
STRNADEL Bohumír
ZIMA Radim
Abstract:
The level of fatigue damage in railway wheel sets is one of limited parameters of rail vehicles reliability. Then new design methods of axles improving fatigue strength, is proposed. [..]
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JURČI Peter Slovak University of Technology in Bratislava, Faculty of Material Sciences and Technology in Trnava, Trnava, Slovakia, EU
Co-authors:
DOMÁNKOVÁ Mária
PTAČINOVÁ Jana
Abstract:
The microstructure, with a particular focus on carbides, of Cr-V ledeburitic steel Vanadis 6 has been examined in various stages (soft-annealing, quenching, sub-zero treatment, tempering) of the heat treatment process. The characterization of the carbides was done using the scanning electron microscopy, transmission electron microscopy and X-ray diffraction. [..]
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BALA Piotr AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Cracow, Poland, EU, pbala@agh.edu.pl
Co-authors:
PACYNA Jerzy
DZIURKA Rafal
Abstract:
The reason for writing this paper was to describe the kinetics of phase transformation of undercooled austenite in the form of the CCT (Continuous Cooling Transformation) diagram as well as the kinetics phase transformation during heating from as-quenched state in the form of the CHT (Continuous Heating Transformation) diagram of the new hot work tool steel. In order to make the CCT diagram of the kinetics of phase transformation of undercooled austenite the samples were heated to a temperature of 940°C with a rate of 5°C/s, hold for 20 minutes and then cooled with various rates (50÷0.02°C/s) to a temperature of 20°C. [..]
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AISMAN David University of West Bohemia in Pilsen, Research Centre of Forming Technology - FORTECH, Pilsen, Czech Republic, EU, daisman@vctt.zcu.cz
Co-authors:
PILEČEK Vít
JENÍČEK Štěpán
Abstract:
Mini-thixoforming is a method of processing metals at temperatures between the solidus and liquidus. Thanks to the small volume of feedstock, it allows very rapid heating and solidification rates to be achieved with great accuracy. [..]
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OLEJARCZYK-WOŻEŃSKA Izabela AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Cracow, Poland, EU, iolejarc@agh.edu.pl
Co-authors:
ADRIAN Henryk
WILK-KOŁODZIEJCZYK Dorota
KLUSKA-NAWARECKA Stanisława
Abstract:
The diffusional transformation of pearlite to austenite takes place when the iron alloy with a matrix containing pearlite is heated to a temperature above Ac1. Development of the transformation contains two stages. [..]
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ANDRŠOVÁ Zuzana Technical University of Liberec, Liberec, Czech Republic, EU, zuzana.andrsova1@tul.cz, bretislav.skrbek@tul.cz
Co-authors:
VOLESKÝ Lukáš
SKRBEK Břetislav
ŠEJNOHOVÁ Ivana
Abstract:
This paper describes usage of a microbending testing device to determine mechanical properties of austempered ductile and grey iron (ADI/AGI) and austempered vermicular-graphite iron (AVGI). Possibilities and benefits of microbending test compared to conventional testing methods are highlighted.. [..]
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BUNDA Zbyněk University of West Bohemia, Faculty of Mechanical Engineering, Department of Material Science and Engineering Metallurgy, Pilsen, Czech Republic, EU
Co-authors:
VOLÁK Josef
Abstract:
This paper describes the fatigue properties of the steel P92. This material is widely used in the energy industry, especially for pipes and pipe bends of supercritical steam turbines. [..]
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