Open Access Conference Proceedings

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. [..] Read more

Abstract: The corrosion behaviour of four grades of valves steels i.e.; X33CrNiMn23-8, X50CrMnNiNbN21-9, X33CrNiMnN23-8, X50CrMnNiNbN21-8, X53CrMnNiN20-8 and X55CrMnNiN20-8 in combustion gases of fuel oil with different quantities of FAME (Fatty Acid Methyl Esters) has been studied. In this work, the results of kinetic oxidation of above mentioned valve steels in combustion gases from diesel engine with 5, 10, 20% [v/v] of FAME are presented. [..] Read more

Abstract: The corrosion behavior of four grades of valves steels i.e. X33CrNiMn23-8, X50CrMnNiNbN21-9, X33CrNiMnN23-8, X50CrMnNiNbN21-8, X53CrMnNiN20-8 and X55CrMnNiN20-8 in combustion gases of petrol with different of ethanol volume percentage has been studied. [..] Read more

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. [..] Read more

Abstract: Monitoring the mechanical properties changes is very important to assure structural integrity of NPP components, especially within the context of their operational life extension. Determination of current mechanical properties of several structural materials of NPP components, especially reactor internals, is not possible using the standard testing methods, in connection with the material volume necessary for the testing. [..] Read more

Abstract: In this study, the effect of different traverse speed of abrasive water jet (AWJ) on HARDOX 400 steel was experimentally investigated. In the experiment five different traverse speeds of 20, 40, 60, 80 and 100 mm/min were used. [..] Read more

Abstract: The high carbon steel rods are designed for the manufacture of wire on the rope and steel cords. They are produced in continuous rolling mills with accelerated cooling device. [..] Read more

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. [..] Read more

Abstract: The paper is dealing with microstructural characterisation and mechanical properties of thermally simulated parts of the heat affected zone in homogeneous weldments of T24 steel. The study has been targeted on the blunt peripheral weld joints of T24 steel between two tubes, which are an integral part of the production of membrane walls. [..] Read more

Abstract: In work the presented numerical models of steel hardening processes take into account thermal, mechanical phenomena and phase transformations. In the model of phase transformations, in simulations heating process continuous heating was applied, whereas in cooling process continuous cooling of the steel at issue. [..] Read more

Abstract: This work concerns numerical simulations of thermomechanical phenomena in laser butt-welding of sheets made of X5CrNi18-10 steel. Abaqus FEA software is used in calculations taking into account phase transformations during material’s state changes and temperature dependent thermomechanical properties of analysed steel. [..] Read more

Abstract: Phase composition of the steel P91 during annealing was studied with the aim to reveal the evolution of new phases. In this paper, the precipitation was characterized using energy-dispersive X-ray spectroscopy (EDS) and electron diffraction in transmission microscopy (TEM). [..] Read more

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. [..] Read more

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. [..] Read more

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. [..] Read more

Abstract: The residual lifetime assessment and the risk of a possible service components failure are critical issues in the safety and reliability analyses of industrial plants. The residual lifetime can be evaluated by the standard mechanical test techniques, such as the tensile test, uniaxial creep test, the Charpy or the fracture toughness test. [..] Read more

Abstract: Heat treatment is one of methods to improve material properties. Heat treated tubes are used in petrochemical industry when high strength, low cost and low weight are needed. [..] Read more

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. [..] Read more

Abstract: The paper deals with the study of phase transformations temperatures of real peritectic micro alloyed steel grade. Phase transformations temperatures were obtained using Differential Thermal Analysis (DTA) and Setaram Setsys 18TM laboratory system. [..] Read more

Abstract: Effects of weld path curvature on microstructure and mechanical properties of structured sheet arc welded joints are studied. Solution of the direct heat conduction problem is obtained by the Green's function method. [..] Read more