Open Access Conference Proceedings

Abstract: The paper presents influence of the main dimension of smoothing media used in the vibro-abrasive machining for geometric structure of the machining surface parts made of aluminum alloy EN AW-2017A. There were used Rollwasch smoothing media PB series -- polyester bonded. [..] Read more

Abstract: Experiments were performed on the crystallization of a CuSO4 solution upon the action of the temperature gradient with the forming of mono crystals three wedges crystal system (prisms). We found that the fractal dimension of crystals equals 2.45, which is consistent with the literature data. [..] Read more

Abstract: Optimization of conditions of heat treatment of Nd-Fe-B-based permanent magnets, prepared using the strip casting method, was carried out with the aim to enhance their coercivity HCJ and maximal energy product (BH)max, and to improve the shape of the demagnetization curve. The initial alloy with the chemical composition (for high-coercivity magnets) of Fe – 67.05; Nd - 19.50; B – 1; Dy – 6.00; Pr – 6.00; Cu – 0.15; Al – 0.30 (wt.%) in form of strips was submitted to hydrogen decrepitation and vibration milling. [..] Read more

Abstract: The purpose of this article is to research temperature field during friction stir welding (FSW). Experimental FSW of 2 mm sheets was provided for temperature determination. [..] Read more

Abstract: The paper outlines the history of development of magnets, from magnetite ore, through to the production of steel, Alnico, ferrite, samarium and neodymium magnets. The directions of further research on the improvement of the magnetic properties of magnets in the future are also discussed.. [..] Read more

Abstract: The main objective of this paper is to describe the microstructure and mechanical properties of spark plasma sintered tungsten. The indentation tests, which are very advantageous because of their semi-nondestructive character and low requirements on the volume of investigated material, were carried out using Berkovich and spherical indenters. [..] Read more

Abstract: The iron aluminides seem to be very perspective materials for use in high-temperature structural applications. They are promising materials for a possible replacement of high alloyed steels of P91 or P92 type. [..] Read more

Abstract: Platinum have become a metal, which is today necessary for every new car production due to its catalytic role, mainly reduction of toxic gases. Prices and demand for platinum are shown as well as the possibilities of recovery this metal from secondary materials, especially spent auto catalyst. [..] Read more

Abstract: Complex study of alloys based on FeAl aluminide was leading in the fifties of the last century to the proposal of. The composition of the binary Fe-Al alloy was modified by C and Si. [..] Read more

Abstract: Titanium and AISI 304 stainless steel were joined using a 0.1 mm thick aluminum foil interlayer at temperatures of 550, 650 and 700 °C for 1 h under 2 MPa pressure in vacuum. The interface microstructures of the bonded samples were observed using the optical and scanning electron microscopes. [..] Read more

Abstract: The Mg–11.5wt.%Zn–3.0wt.%Al and Mg–5.1wt.%Zn–3.3wt.%Al–0.1wt.%Ca alloys were squeeze cast under a protective gas atmosphere (Ar + 1% SF6). Precipitation reactions were studied by differential scanning calorimetry at heating rates of 0.5 – 30 K/min. [..] Read more

Abstract: Refractory linings of metallurgical furnaces have two main purposes: to control the heat flow, and to contain high temperature liquids (metal and slag). Through a proper management of heat flows, a layer of slag called freeze lining crystallizes on the internal walls of the furnace thereby protecting the bricks from the very corrosive high temperature liquid slag. [..] Read more

Abstract: For production bearing welds at resistance spot welding there is very important value about number of welds made by electrodes at which is created regular welding spot higher than certain minimal value and thus also efficient bearing capacity. During welding there is with increasing number of welded spots simultaneously also wearing of electrode working area, changing of conditions for creation weld joints and thus also their quality. [..] Read more

Abstract: Deformation twinning is frequently observed in materials with hexagonal crystal lattice. It plays important role in plastic deformation of such materials. [..] Read more

Abstract: Study of structural and mechanical physical properties of metal powders is important considering the processes in powder metallurgy. The procedural behavior of copper, iron and aluminum powders depends on many parameters. [..] Read more

Abstract: Jet cooling is used in many industrial applications. A typical application is the ingot casting process. [..] Read more

Abstract: The paper deals with the characterization of the structure and phase composition of selected types of nickel alloys. Castings were prepared by vacuum induction melting and centrifugal casting. [..] Read more

Abstract: In the present investigation, transient liquid-phase bonding was performed between pure titanium (Grade 2) and stainless steel (X5CrNi 18-10) using 0.1 mm thick nickel foil as an intermediate material. The process was carried out at the temperatures of: 850, 875, 900, 925, 950 and 1000 °C for 60 minutes under the compressive stress of 2 MPa in a vacuum. [..] Read more

Abstract: Iron aluminides are perspective structural materials for high temperature use. Addition of Zr into Fe3Al matrix leads to formation of strengthening intermetallic phases, which affect their high-temperature behaviour. [..] Read more

Abstract: Material AZ61A of thickness 1 mm was laser welded by disc laser without using filler wire. Laser welding w/o filler wire is very demanding on sheet metal edges preparation, so different methods of edge preparation, e.g. [..] Read more