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Conference Proceedings - METAL 2015
24th International Conference on Metallurgy and Materials
June 3rd - 5th 2015 / Hotel Voronez I, Brno, Czech Republic, EU
www.metalconference.eu
ISSN: 2694-9296
ISBN: 978-80-87294-58-1
Proceedings of the conference were published in Web of Science and Scopus.
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MAHMOUD Houssam Brno University of Technology – Faculty of Mechanical Engineering, Brno, Czech Republic, EU
Co-authors:
VLASIC Frantisek
MAZAL Pavel
Abstract:
Managing instrumentation and control obsolescence, improving the safety, and extending the lifetime of older nuclear reactors (such as VVER-440) are the primary objectives of nuclear power plants in Central and Eastern Europe. Extending reactor life to 60 years and beyond will likely increase susceptibility and severity of known forms of degradation. [..]
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MAJTÁS Dušan Centre of Excellence Telč, ITAM AS CR v.v.i., Telc, Czech Republic, EU
Co-authors:
KREISLOVÁ Kateřina
VIANI Alberto
PÉREZ-ESTÉBANEZ Marta
GEIPLOVÁ Hana
Abstract:
From the economic reasons many products originally made from austenite stainless steel are nowadays made from ferritic stainless steel. Ferritic steels have relatively low yield strength and the work hardening is limited. [..]
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MAKAREVIČIUS Vidas Lithuanian Energy Institute, Kaunas, Lithuania, Vidas.Makarevicius@lei.lt
Co-authors:
BALTUŠNIKAS Arūnas
LUKOŠIŪTĖ Irena
KRIŪKIENĖ Rita
GRYBĖNAS Albertas
Abstract:
Ferritic-martensitic P91 grade steel is widely used for manufacture pipes and boilers of thermal and nuclear power plants due to its high strength and creep behaviour at high temperatures and the advantage of small thermal stress in cyclic operations. During long-term operation of power plant components under elevated temperatures and steam pressure the changes of steels structure occur, on which those mechanical features and remnant service life depend. [..]
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MAZANCOVÁ Eva VSB - Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Ostrava, Czech Republic, EU
Co-authors:
SAKSL Karel
OSTROUSHKO Dmytro
KUČERA Pavel
Abstract:
The work deals with hydrogen susceptibility of joint of explosively welded anticorrosion steel of 18Cr/10Ni type with titanium of commercial purity. Studied welds were after twice heat treatment (600°C/1.5 h/air) and those were tested in corrosive solution in accord with NACE Standard TM0177-2003 (sulphide stress cracking under stress), representing dynamic test. [..]
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MICU Lavinia Madalina „Polytechnica“ Universty of Timisoara, Timisoara, Romania, EU lavimicu@yahoo.com, ion.mitelea@upt.ro, ilarica59@gmail.com, craciunescucm@yahoo.com, octavian.oanca@yahoo.com
Co-authors:
MITELEA Ion
BORDEASU Ilare
CRACIUNESCU Corneliu Marius
OANCA Octavian Victor
Abstract:
In this paper is analyzed, through comparison, the cavitation erosion resistance of Duplex stainless steel, with a microstructure of approx. 50% austenite and 50% ferrite, solution annealed from 1060C with water cooling and finally nitrided at 520C for 40 hours in an ammonia environment. [..]
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MŁYNARCZYK Piotr Kielce University of Technology, Kielce, Poland, EUp.mlynarczyk@tu.kielce.pl, sspadlo@tu.kielce.pl, wdep@tu.kielce.pl, sliwaed@gmail.com, karas.18@o2.pl
Co-authors:
SPADŁO Sławomir
DEPCZYŃSKI Wojciech
ŚLIWA Edyta
STRZĘBSKI Damian
Abstract:
The article presents preliminary results of microwelding thin sheet occurred of superalloy H 230®. There were shown the possibilities of combining thin metal sheet using resistive pulse microwelding. [..]
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MRZYGŁÓD Barbara AGH University of Science and Technology in Cracow, Poland, EU, mrzyglod@agh.edu.pl
Co-authors:
OLEJARCZYK-WOŻEŃSKA Izabela
ADRIAN Henryk
GŁOWACKI Mirosław
Abstract:
The paper presents the results of microstructure examinations of ductile iron with the additions of Ni, Cu and Mo. TTT diagrams - illustrating the range of phase stability as a function of the time of isothermal annealing at a given temperature, and CCT diagrams - illustrating the range of phase stability during continuous cooling at a predetermined rate were developed.. [..]
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OCHODEK Vladislav VSB - Technical University of Ostrava, Faculty of Mechanical Engineering, Dept. of Mechanical Technology, Ostrava, Czech Republic, EU, vladislav.ochodek@vsb.cz
Abstract:
The methods of intensive plastic deformation SPD (Severe Plastic Deformation) belong to a group of very attractive means of increasing utility properties of metallic materials (strength and structural characteristics). The paper is focused on experimental verification of weldability of high-carbon steel C55E processed by the SPD DRECE (Dual Rolling Equal Channel Extrusion) process. [..]
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OLEJARCZYK-WOŻEŃSKA Izabela AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, al. A. Mickiewicza 30, 30-059 Cracow, iolejarc@agh.edu.pl
Co-authors:
ADRIAN Henryk
MRZYGŁÓD Barbara
GŁOWACKI Mirosław
Abstract:
The heat treatment process of ductile iron involves two stages: austenitising at temperatures in the range of 850-950oC with the following austempering of alloy in the temperature range of 250-380oC. The resulting microstructure contains ferrite saturated with carbon in a matrix of reacted high-carbon austenite with spheroidal graphite typical of ductile iron. [..]
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PALAMARCIUC Ion “Gheorghe Asachi” Technical University of Iași, Iași, Romania, EU, palamion@gmail.com, dangalusca@yahoo.com
Co-authors:
GALUSCA Dan Gelu
MANHART Jacob
OKOLIE Norbert
Abstract:
It is generally recognized that the high content of non-metallic inclusions in structural steels alter their physical and mechanical properties. Formation of non-metallic inclusions is a complex phenomenon that depends on the composition, pressure and temperature of the working media. [..]
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PAWŁOWSKI Bogdan AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Cracow, Poland, EU
Co-authors:
BAŁA Piotr
DZIURKA Rafał
Abstract:
The formation of austenite above A1 temperature plays very important role in the heat treatment of hypo-eutectoid steels, especially automotive DP steels. It is widely accepted that the formation of austenite during intercritical annealing takes place in three stages: 1 – very rapid pearlite to austenite transformation, 2 – slower growth of austenite into ferrite, 3 – slow final equilibrium of ferrite and austenite. [..]
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PIEKARSKA Wiesława Częstochowa University of Technology, Institute of Mechanics and Machine Design Foundations, Częstochowa, Poland, EU
Co-authors:
GOSZCZYŃSKA Dorota
Abstract:
Analytical models used for the analysis of phase transformations as well as the prediction of structural composition of welded elements are the subject of research for many years. Despite of certain simplifications they are invaluable in assessing the weldability and welding conditions. [..]
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ROZUMOVÁ Lucia Research Centre Rez, Hlavní 130, Husinec-Řež, 250 68, Czech Republic
Co-authors:
HOJNÁ Anna
KALIVODOVÁ Jana
BUBLÍKOVÁ Petra
HADRABA Hynek
DI GABRIELE Fosca
Abstract:
Oxide-dispersion-strengthened steel (ODS) MA957 has been studied as a candidate material for Tritium Breeding Blanket for fusion reactors with helium coolant, where temperatures 250–650 °C are expected. Helium is one of type as primary coolant in High Temperature Reactor and Gas Cooled Fast Reactor with working temperature 5001000 °C.This work presents results of the study of behaviour of ODS (MA957) under influence of high temperature helium environment. [..]
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Salcianu Laura Cornelia „Polytechnica“ Universty of Timisoara, Timisoara, Romania, EU, salcianu.laura@yahoo.com, ilarica59@gmail.com, ion.mitelea@upt.ro, craciunescucm@yahoo.com
Co-authors:
BORDEASU Ilare
MITELEA Ion
Crăciunescu Corneliu Marius
Abstract:
The cavitation erosion resistance of the stainless steel was studied with ultrasonic vibration equipment, at a frequency of 20 kHz and oscillation amplitude of 50 μm. Varying the holding duration at the constant heating temperature, causes changes both in terms of the not dissolved austenite, chemical compounds (carbides, inter-metallic phases), phases proportion, as well as in the size of the crystal grains.The cavitation test results were compared with those obtained by the standard OH12NDL steel used in the manufacturing of hydraulic turbine blades Kaplan of the Power Plant Iron Gates I, Romania. [..]
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Schmidova Eva University of Pardubice, Jan Perner Transport Faculty, Pardubice, Czech Republic, EU, eva.schmidova@upce.cz
Co-authors:
CULEK Bohumil
KAYA Utku
Abstract:
The process of dynamic strengthening of Hadfield steel, currently widely used for cast railway frogs, was studied. Continual dislocation hardening up to the depletion of plasticity and creation of surface microcracks presents the specific limited state under rolling contact in this application. [..]
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ŠKORÍK Viktor Institute of Physics of Materials, Academy of Science of the Czech Republic, Brno, Czech Republic, EU
Co-authors:
ŠULÁK Ivo
OBRTLÍK Karel
POLÁK Jaroslav
Abstract:
Many structural components of nuclear power plant systems are made of austenitic stainless steels. These structures undergo degradation by thermo-mechanical fatigue (TMF) caused by simultaneous cyclic straining and temperature cycling, particularly during start-up, shut-down and transient operations. [..]
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SMOLJAN Božo University of Rijeka, Faculty of Engineering, Rijeka, Croatia, EU
Co-authors:
ILJKIĆ Dario
POMENIĆ Loreta
Abstract:
The objective of design of quenching is to estimate the results of quenching, concerning mostly with the estimation of microstructure and mechanical properties. For the simulation of specimen cooling which is thermos-dynamical problem, it is necessary to establish the appropriate algorithm which describes cooling process, and to accept appropriate input data.Microstructure composition and hardness will be defined by kinetic equations of prior microstructure decomposition, based on time of cooling from 800 to 500 °C, which is relevant to microstructure transformation. [..]
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SPADŁO Sławomir Kielce University of Technology, Poland, EU, sspadlo@tu.kielce.pl, p.mlynarczyk@tu.kielce.pl, wdep@tu.kielce.pl
Co-authors:
MŁYNARCZYK Piotr
DEPCZYŃSKI Wojciech
Abstract:
The paper presents a brief study of micro electro spark deposition with using an tungsten electrode. The electrical-discharge alloying with wire electrodes (WEDA) is a machining method performed on EDM machine with using elastically wire electrode such as alloying electrode. [..]
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KOCZURKIEWICZ Bartosz Czestochowa University of Technology, Faculty of Production Engineering and Materials Technology, Institute of Metal Forming and Safety Engineering, Czestochowa, Poland, EU, koczur@wip.pcz.pl
Co-authors:
STEFANIK Andrzej
Abstract:
The paper present the concept of a mathematical model for predicting changes in the microstructure of the austenite steel for cold upsetting, the research was carried for 30MnB4 23MnB4 steel grade. Microstructure evolution model is based on the classic Sellars model developed by taking into account the parameters of plastic forming processes and their impact on the processes occurring in the deformed steel. [..]
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STRADOMSKI Grzegorz Technical University of Czestochowa, Faculty of Production Engineering and Materials Technology, Institute of Plastic Forming Processes and Safety Engineering, Częstochowa, Poland, EU, gstradomski@wip.pcz.pl
Abstract:
Steels and other ferrous alloys are very well known as construction materials in many fields but still are widely used and in the near future this will not change [1-4]. Among the steel and cast steel resistant to corrosion most modern and dynamically developing group are ferritic-austenitic alloys, commonly known as duplex. [..]
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