Open Access Conference Proceedings

Abstract: Numerous engineering components which are in contact with liquid environments that are working under pressure can be degraded by cavitation erosion.The present paper study the improvement of cavitation erosion resistance of gray cast iron with lamellar graphite and pearlite microstructure by applying the nitriding thermochemical treatment.The cavitation tests were carried out on a vibratory device with piezoceramic crystals in accordance with ASTM G32 - 2016 standard.The material degradation is demonstrated by mass loss and erosion rate variation depending on the cavitation attack period. As reference material it was considered the same type of gray cast iron, subjected to softening annealing treatment. [..] Read more

Abstract: The electromagnetic properties of strips made of grain-oriented electrical steels (GOES) are strongly affected by the sharpness of the Goss texture. The Goss texture is defined by {110} 001, where the planes {110} are parallel to the surface of the strip and the directions 001 are parallel to the rolling direction. [..] Read more

Abstract: The effect of surface treatments on mechanical properties and corrosion resistance of most engineering steels is the object of a significant number of studies. It is known that surface machining can affect the steel local mechanical properties and, thus lead to the premature cracking under certain conditions. [..] Read more

Abstract: The continuous casting process requires permanent investigation and innovative improvements due to its large application in steel production. A good hot ductility behavior is essential to avoid the formation of defects during slab casting. [..] Read more

Abstract: The good weldability of thermomechanically rolled high-strength steels is vital for contemporary steel structures. Full utilization of their capacity requires detailed knowledge and quantification of all processes that are involved by the heat-deformation cycle during welding. [..] Read more

Abstract: This work deals with the influence of heat treatment and TIG welding technology on the mechanical properties and microstructure of welded joint. The weld was performed on a product from austenitic 316L stainless steel which was made by using SLM additive technology. [..] Read more

Abstract: In metal forming processes, in some cases, galling occurs, which results in the formation of built-up edges on the surface of the tool. They usually damage the outer layer of the workpiece. [..] Read more

Abstract: Condition of a spindle of a machine tool affects not only operation of the machine tool itself, but also, above all, the quality of the machining. This paper short explains the terminology and describes the our own research used to measure the spindle error movements. [..] Read more

Abstract: Steel wire ropes are lifting equipments used in many areas such as fishing, mining, oil&gas, construction and marine. Steel wire ropes, which stand out with their high lifting capacity and optimum elongation, can be produced in different properties and constructions. [..] Read more

Abstract: The microstructure of steels after mechanical polishing is revealed only by the application of a suitable etchant. To achieve adequate optical or electron microscope images, the specimen surface must be free of any artifacts. [..] Read more

Abstract: The objective of the study is to evaluate the effects of severe plastic deformation (SPD) and annealing on creep behaviour of advanced tungsten modified creep-resistant 9 % Cr martensitic P92 steel. The as-received P92 steel was deformed by high-pressure torsion (HTP), high-pressure sliding (HPS) and rotary swaging (RS) at room temperature prior creep testing. [..] Read more

Abstract: In power plants, special concerns from the point of view of destruction are caused by parts rotating at high frequencies, especially metal-consuming and highly loaded shafts of turbo-machines. When analyzing data on the interaction of the most dangerous metallurgical defects - cracks - the concept of “relative size” of a defect (RDS) is used, which is the ratio of half of the total size of defects to the distance between their centers. [..] Read more

Abstract: As the tendency to lower the mass of welded constructions emerges in the last years, the use of high strength steels finds a wide range of applications in industry, namely, in reliable highly loaded welded constructions. Following the commonly accepted rules, these steels are suitable for welding. [..] Read more

Abstract: In most cases, the components (U-profiles, Ω-profiles, box-beams) are used to validate the material model generated from the measurement of individual sheet metal parameters. The validation process consists of comparing the resultant force vs displacement from the experiment to the simulation. [..] Read more

Abstract: Small punch creep test (SPC test) is an alternative and still developing method to conventional uniaxial creep test and as such can be used for obtaining information about the creep properties of steels and alloys even when only a limited amount of test material is available. SPC method has been also implemented into EN 10371 "Metallic materials – Small punch test method". [..] Read more

Abstract: This study presents the results of two-body abrasion tests on several high-carbon low-alloy steels initially consisting of a dual-phase microstructure containing metastable austenite and thermally induced plate martensite. The wear behavior of these metastable austenitic steels (MAS) is compared to commercial wear-resistant steels. [..] Read more

Abstract: The main purpose of the research was to determine the effect of local laser heating on the tensile stress under load. The simulation results show that the different locations and the number of laser tracks (internal reinforcing ribs) on a thin-sheet surface had a great influence on the stress distribution during tensile loads. [..] Read more

Abstract: Many power plant operators are currently struggling with the problem of expiring the design life of components. The question often arises whether to continue the operation of the equipment or if it is already necessary to shut down/overhaul it. [..] Read more

Abstract: The main goal of this article is to present the results of state the microstructure in chromium ledeburitic tool steel commercially named Sverker 3. This material was treated by austenitizing at various temperatures and then quenched in oil. [..] Read more

Abstract: According to the three-dimensional digital model additive production as a method of product manufacturing allows creating complex-profile structures with high mechanical and operational specifications. Metal products structuring in accordance with the process of their production is of considerable interest. [..] Read more