Open Access Conference Proceedings

Abstract: The effect of High Temperature Thermomechanical Processing (HTMP) using hot rolling on the structure, mechanical properties of nitrogen bearing niobium alloyed 18Cr-10Ni austenitic stainless steel is presented. It has been found that the strengthening effect of HTMP depends significantly on the kinetics of deformation accumulation schedule. [..] Read more

Abstract: The paper describes the theoretical knowledge about the process of forming holes in the solid material. The own design solution of an experimental device for forming cylindrical sleeves is presented. [..] Read more

Abstract: By using of hot tensile tests, which were realized on the simulator HDS-20, the strength and plastic properties of two progressive alloys, based on Fe-Ni-Cr (Incoloy 800HT) and Fe-Ni (Invar 36), were experimentally determined. By a special type of a tensile test, involving a continuous control heating of the tested specimens at their simultaneous load by a constant tensile force of 80 N, a nil-strength temperature of both investigated alloys was determined. [..] Read more

Abstract: This study aimed to clarify the effect of the activity of the multiple slip systems on the height change of each grain of the inner surface of tube during the hollow sinking. A stainless steel tube with an outer diameter of 1.50 mm, and a wall thickness of 0.045 mm, which had only one grain across the wall thickness, was used as a starting material. [..] Read more

Abstract: Steel is an integral part of today's life. To obtain the desired mechanical properties of hot rolled steel plates or strips, it is necessary to predict and control the cooling process. [..] Read more

Abstract: Electrical steel sheet is an important material in the manufacture of various parts of electrical devices with high magnetic properties. The need to form the desired properties of the metal makes special demands on the organization of the production technology for both hot-rolled and cold-rolled sheets. [..] Read more

Abstract: The main purpose of this study is to develop an algorithm for determining the friction coefficient value using actual technological parameters of the hot rolling mill. The presented algorithm is based on Ekelund formula where the friction coefficient is expressed in terms of the roll bite contact geometry, which can be calculated using technological parameters such as forward slip, metal thickness and roll diameter. [..] Read more

Abstract: Severe plastic deformation is the most efficient method of refining the material structure and producing submicro- and nanocrystalline materials with a unique combination of strength and ductility properties due to a fragmented structure. Upon reaching a definite deformation rate, the fragmentation process is evolving, i.e. [..] Read more

Abstract: A wire manufacturing process includes wire rod structure and surface preparation (heat treatment), coating, shaping and other operations with finished wire. A key operation influencing the shape and properties is drawing using monolithic and roller dies of various structures. [..] Read more

Abstract: As a result of the general need for lightweight product design, multi-material systems are gaining in importance. In addition to reducing component weight, the combination of different materials in a single component allows other properties to be locally tailored to its application. [..] Read more

Abstract: Stainless steels are nowadays used in a wide range of industrial products. One example of their utilization in the industrial practice represents production of the exhaust systems components in the automotive industry. [..] Read more

Abstract: The paper presents the results of computer modeling of a new technology for bar scrap recycling, which includes two processing technologies: radial-shear rolling and drawing. At the first stage, the initial billet in the form of a reinforcement profile with a diameter of 16 mm is heated to 1000 °C and rolled on a radial-shear rolling mill to a diameter of 14 mm. [..] Read more

Abstract: To explore the feasibility of directly spinning thin-walled components from aged aluminum alloy sheets under rapid laser heating, the laser-assisted spinning process of aged 7075-T6 aluminum alloy was carried out by means of an ellipsoid component shear spinning test. Compared with cold spinning, the critical thinning of the laser-assisted spun component was more than 30 % higher than that of the cold spun component, and the laser-assisted spun component has good geometric accuracy, which indicates that the formability of the 7075-T6 aluminum alloy can significantly be improved with the laser-assisted spinning process. [..] Read more

Abstract: For micro forming process, the initial material of sheet metal is desired, with the thickness below 1 mm. Miniature parts have tight dimensional tolerances and require low surface roughness. [..] Read more

Abstract: Method DRECE (Dual Rolls Equal Channel Extrusion) belongs to a perspective group of technologies utilizing the process of severe plastic deformations (SPD). Used for forming of metallic materials. [..] Read more

Abstract: A sheet-forging process is proposed to form thin-walled structures with crossed-ribs. To solve the problem of grid distortion in finite element simulations, an element reconfiguration strategy that combines a stress-strain map solution and element reconstruction is applied, and typical samples with crossed-ribs are designed to verify the accuracy of simulation. [..] Read more

Abstract: Owing to their exceptional combination of mechanical and physical properties, tungsten heavy alloys (THAs) are advantageous for demanding applications. The presented study focuses on analysing the effects of processing of THA bar by the cold rotary swaging method, particularly on investigating the effects of processing on residual stress within the swaged bar. [..] Read more

Abstract: Research and development of construction materials for fusion reactors is an important international task. CuCrZr material is a promising material for fabrication of coolant tubes inside the divertor and other components. [..] Read more

Abstract: The influence of initial soaking and parameters of hot plastic working on the substructure of the A-286 superalloy have been presented. The research was performed on a torsion plastometer in the range of temperature 900 – 1150 °C, at a strain rates of 0.1 s-1 and 1.0 s-1. [..] Read more

Abstract: In the last three decades, equal channel angular pressing (ECAP) process is used for extreme microstructural refinement of the metal materials which leads to improvement of the mechanical and physical properties. Using ECAP method significant strains can be imposed into the material. [..] Read more