Open Access Conference Proceedings

Abstract: The work presents the microstructure, chemical composition and mechanical properties of Inconel 686 coatings after high - temperature corrosion in environment of aggressive gases and ashes. To produce the Ni - based coatings the QS Nd:YAG laser cladding process was carried out. As the substrate used 13CrMo4-5 boilers plate steel. [..] Read more

Abstract: Inhibition of stainless and mild steel corrosion in 1 M HCl solution by 1-octyl-3-methylimidazolium bromide and 1-dodecyl-3-methylimidazolium bromide was investigated using electrochemical and weight loss methods. The qualitative surface analysis was carried out. [..] Read more

Abstract: The NiCrAl-21% Bentonite abradable coating, deposited by flame spraying, was exposed to 720°C / 1 hour air-annealing to evaluate its resistance against heat-induced changes. The SEM and XRD microstructure evaluation was done. [..] Read more

Abstract: There are various solutions to the endings of flue, combustion and ventilation ducts. Their location is largely high altitude installations that are often difficult to access. [..] Read more

Abstract: Infrared nondestructive testing is an inspection method based on an external excitation of a measured sample and a thermographic analysis of its thermal response. It often uses advanced evaluation techniques based on temperature spatial and temporal changes. [..] Read more

Abstract: Infrared nondestructive testing (IRNDT) is an active thermography method for inspection of material-surface inhomogeneities or discontinuities. It is based on an excitation of an inspected sample and a detection of its thermal response by thermographic methods. [..] Read more

Abstract: The presented work constitutes the continuation of the previous research concerning the measurement of the tribological properties of different zinc coatings deposited to fasteners. The applied heat treatment was mainly focused on increasing the hardness of the outer layer of the zinc coating and increasing wear resistance. [..] Read more

Abstract: The adhesion strength of a plasma-sprayed Al2O3 coating with a steel surface was investigated. Various cooling options for this surface were used. [..] Read more

Abstract: Continuous improvement of quality and cost saving in manufacturing of machine parts result in the search for an alternative materials for high temperature applications. In the present study a comparaison of cobalt-matrix material and iron based material for PTA hardfacing is presented. [..] Read more

Abstract: In this work, modelling of Nitinol (Ni-45 wt.%Ti) coating deposition, by means of High Velocity Oxygen-Fuel (HVOF) technology, is presented. Species transport model and the k- ε turbulence model were solved in Ansys Fluent environment, in which combustion between kerosene and oxygen, gas and particle flow in a GTV HVOF-K2 gun (GTV Verschleiss-Schutz GmbH, Germany) were simulated. [..] Read more

Abstract: Lead bulls are often stored in an inappropriate environment with the presence of organic acids to which lead is sensitive. The aim of this work was to test compounds inhibiting the lead corrosion due to acetic acid vapours. [..] Read more

Abstract: The article presents the results of the milling tests - "hard machining" - on the processed (hardened and tempered) material X37CrMoV5-1 (ČSN 19552). At the beginning, the hardness tests of the machined material block were carried out using the Rockwell method. [..] Read more

Abstract: The aim of this paper is to examine the effect of the oxide layer thickness on the absorption of IR radiation in the inert gas atmosphere. The oxide layers are created by the controlled heating method, while the different thickness of layers is achieved by changing the heat input. [..] Read more

Abstract: The tools used for milling and grinding can have a limited lifetime due to excessive wear. Their lifetime can be prolonged by application of suitable coatings. [..] Read more

Abstract: This paper addresses structural changes of Al-Si coating depending on various heat treatment parameters. Al-Si coated martensitic steel is one of the most commonly used materials in automotive industry for structural parts. [..] Read more

Abstract: Nowadays, the porous coatings enriched in determined chemical elements on CP Titanium Grade 2 may be obtained by Plasma Electrolytic Oxidation (PEO), the process also known as Micro Arc Oxidation (MAO). It should be pointed out that DC, AC, or pulse voltage may be used to create these coatings; however, their structures, chemical composition and mechanical properties are always different than the substructure (matrix). [..] Read more

Abstract: Nanoindentation methods used for evaluation surface layers are static indentation and scratch indentation too. Static indentation methods are used namely for evaluation hardness characteristics and for evaluation elastic deformation and plastic deformation of surface layers too based on measurement indentation curves – dependence depth indentation and normal force during all indentation process during loading and unloading. [..] Read more

Abstract: The paper is devoted by evaluation of comparison of selected systems of thin film – basic material, which are optimized in the range of solution of the project with goal application of thin films on selected real cutting tools. There are evaluated thin films prepared by low voltage reactive arc evaporation in vacuum with different composition of ternary nitride. [..] Read more

Abstract: The paper is devoted of verification of possibilities of evaluation of initial changing of properties and behaviour of selected polymeric isolation of cables after defined temperature loading simulated of external operational conditions and simulated temperature loading evoked by current loading. There are evaluated initial properties and behaviour of selected polymeric cable isolations and properties and behaviour after natural ageing process and controlled accelerated ageing process during higher temperature loading and different time of exposition to the higher temperature. [..] Read more

Abstract: The paper is devoted by simulation of conditions of sun radiation in correlation with real loading in operational conditions of selected polymeric materials. In the second the paper is devoted by simulation of temperature conditions of loading again in correlation with temperature loading in real operational conditions of selected polymeric materials. [..] Read more