Open Access Conference Proceedings

Abstract: Martensitic stainless steels are broadly used in industrial applications where demands for higher strength, hardness and wear resistance are high. Tempering treatment plays a crucial role on performance of such steels. [..] Read more

Abstract: In the present study, direct-quenched steel with and without tempering at 600 °C has been studied in order to evaluate the possibilities of widening the range of strengths that can be produced from a single base composition. Microstructural studies of direct-quenched (DQ) and direct-quenched and tempered (DQT) steels showed that, in both cases, the microstructure consisted of mainly bainite formed from highly pancaked prior austenite grains, the main difference being a larger carbide size in the tempered condition. [..] Read more

Abstract: Two welding schemes of single and double pulse were used for the resistance spot welding of DP1000 dual phase steel. The changes in the mechanical performance and variant pairing of martensite under two different welding conditions were scrutinized. [..] Read more

Abstract: Steel S235JR is one of the most popular structural material using on welding constructions. The microstructure of this steel consists of two phases: ferrite and perlite. [..] Read more

Abstract: Paper presents the analyses of high strength steels type of MnB5, widely used for auto-body passive safety parts. Different surface treatment towards to weldability optimization was subjects of performed experiments. [..] Read more

Abstract: The presented study is focused on elaboration of the processing conditions of forging and controlled cooling for medium-carbon steel alloyed with micro additions, so as to meet the requirements of special civil engineering applications. Based on assumption of utilization of the heat attained in the forged part after hot deformation, austempering cycles were investigated so as to meet the microstructure-property combination required by special application. [..] Read more

Abstract: Dissimilar welds are widely used in tubular systems of power plant boilers to compensate for different operating conditions. Redistribution of interstitial elements across the fusion line is regarded to be the most dangerous degradation mechanism in heterogeneous welds. [..] Read more

Abstract: Dynamic yield stress values predicted within the structural-temporal approach based on the incubation time concept and those found from the popular empirical Johnson–Cook and Cowper-Symonds formulas and its known modification are compared with the examples of high strength steels and nickel alloy subjected to high-rate plastic deformation. It is shown that the structural–temporal approach is an efficient and convenient tool for calculations in a much wider range of deformation rates. [..] Read more

Abstract: The ferritic martensitic steel T91 is among the candidate materials for internal structural components of future Heavy Liquid Metal cooled reactors. The position of T91 on the list of the candidate materials is now being questioned due to the evidence of its sensitivity to liquid metal embrittlement (LME), mainly in PbBi eutectic. [..] Read more

Abstract: Compatibility of structural materials with a coolant, in conditions relevant to power plant operation, is a field of research of primary importance to nuclear safety. The current work describes the behaviour of T91 steels, under such conditions. [..] Read more

Abstract: A new surface induction hardening technology was for the first time in Europe developed in BONARTANS GROUP Company for the purpose of increasing the safety and resistance of railway axles to fatigue damage. The operation of railway axles should fulfil two main demands: higher safety and low operation costs. [..] Read more

Abstract: Fracture surfaces of X70 steel DWTT broken samples are analysed using new surface evaluation concept. The presented approach is an alternative to an expert determining a ratio between the ductile and brittle fracture area. [..] Read more

Abstract: Bearing steels are used for parts requiring high hardness and wear resistance. Conventional hardening of the bearing steel is carried out at 840-870 °C after reheating of the initial structure of ferrite and carbides. [..] Read more

Abstract: Inhibition of mild steel corrosion in 1 M HCl solution by alkylimidazolium bromides was investigated using electrochemical and weight loss methods. The studied ionic liquids showed appreciable inhibition efficiencies. [..] Read more

Abstract: The contribution deals with possibilities of using infrared thermography for inspection, diagnostics and control in laser welding technologies. Laser welding methods and infrared thermography inspection methods are also introduced. [..] Read more

Abstract: During the investigation a quality of the thermal diffusion coating dedicated for anticorrosion protection of fasteners was assessed. Because of similarity of parameters and structures, properties of the inspected coating (thermal diffusion) were compared with effects get as a result of hot-dip galvanizing. [..] Read more

Abstract: The influence of heat treatment on the microstructure, mechanical and sliding wear properties of Hastelloy C-276 HVOF sprayed coatings was evaluated. The applied furnace heat treatment modified the coatings microstructure, leading to precipitation hardening and oxidation of inter-splat boundaries, but had a negative effect on the sliding wear resistance. [..] Read more

Abstract: Failure and wear of tools made of high speed steel (HSS) is a common cause of production slowdowns or interruptions. Renovation of structures made of high-speed tool steel can significantly reduce production costs and time needed for resumption of production. The Tool steel of HSS 23 type (M3/2, PMHS6-5-3C) was cladded on substrate of the same type of steel and heat-treated. [..] Read more

Abstract: Silica aerogels, as well as those consisting of other metal oxides (alumina, zirconia, titania or mixture of these oxides), are extremely porous (up to 99%) high-tech materials with very high specific surface areas (1000 m2 g-1) and low thermal conductivity (below 0.02 W / mK). The typical aerogel production process includes several steps and starts with the preparation of a sol. [..] Read more

Abstract: The study determines the effect of different surface preparation method of grade cast iron GJL-250 on the mechanical properties of the hot-dip zinc coating. The samples for testing were taken from the parts used in the construction of power overhead lines. [..] Read more