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Purpose: of this paper is the verification of multi-layer SAW welding the raw material “1.6946” by different welding consumables (TOPCORE 838 B, Thermatit MTS 616) in the „ultra” narrow gap using the prescribed temperature cycle and subsequent heat treatment. Design/methodology/approach: An evaluation of the mechanical properties of the test for both types welding consumables. The measured values...
Purpose: The present study deals with the influence of channel angle on the deformation behavior and strain homogeneity in the transverse direction of sample after two ECAP passes. Design/methodology/approach: To increase the efficiency of ECAP method, there is necessary to design the geometry of ECAP die with focused on high degree of plastic deformation homogeneity. This analysis was carried out...
Purpose: The aim of this article is to pay attention on the necessary of protection of the people and devices from the harmful electromagnetic radiation. The special role play the screens (materials or systems) for shielding which have a very diversified construction depending on the frequency of electromagnetic fields. Design/methodology/approach: In the paper a problem of electromagnetic fields...
Purpose: The thermal and mechanical properties of Ni-Cr-B-W alloys as a function of tungsten content were studied. Design/methodology/approach: The studies were performed on (Ni49.7Cr14.7B35.6)100-xWx(x:15-40) metallic glass in the form of foils, which have thickness of 20 and 100 μm. Structures of samples wer examined by X-ray diffraction (XRD). Thermal stabilities of the amorphous samples were measured...
Purpose: In this paper was set the aim to determine energy breaking during the impact test. As part of the work, the strength of the bimetallic plates exposed to cracking as a result of dynamic bending forces from the two layers as well as across the connection area of bimetallic plate was analyzed. Design/methodology/approach: To determine the technological properties of this group of materials are...
Purpose: The aim of this study was to evaluate the influence of alloying additions iron or aluminium on corrosion resistance in artificial saliva solution of a dental cobalt alloy Remanium 2000+ after casting. Design/methodology/approach: Pitting corrosion resistance was evaluated on the basis of anodic polarization curves obtained during electrochemical potentiodynamic polarization tests, which was...
Purpose: The aim of the presented researches is development and design of fluid bed mixed by hot gas. The fluid bed is designed to the chemical-heat treatment with thermo-active powders. This treatment is used for tools and mechanical parts. Design/methodology/approach: Contribution is focused on increasing of the cutting property of tools made from high speed steel by chemical-heat treatment. Precisely...
Purpose: This article is devoted to the development and mathematical modeling of the new technology of forging of blanks such as slabs and plates from ferrous and non-ferrous metals and alloys in a step dies with a wedge bumps and hollows, allowing for minor energy consumption to intensify shear deformation in both longitudinal and transverse directions. Design/methodology/approach: The combination...
Purpose:The experimental researches of this paper were carried out in order to investigate the characteristics of the oxide layers obtained on the internal and external surfaces of an austenitic stainless steel pipe. Design/methodology/approach: The surfaces of an austenitic stainless steel pipe were investigated by Scanning Electron Microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX) and...
Purpose: This article is devoted to methods for predicting the results of surface modification of titanium alloys in glow discharge nitriding. With this advantage, it is given to the analytical criteria as the most appropriate for design automation of processes processing. Design/methodology/approach: The methodology is the position that the nitriding process is a combination of several competing...
Purpose: This paper presents a new method of nitrocarburizing in chemically active powders fluidized by mechanical vibrations. Design/methodology/approach: The research in the field of microstructure (light microscopy), hardness, wear resistance and impact strength was carried out on specimens made of X37CrMoV5-1 alloy tool steel subjected to nitrocarburizing at a temperature 560°C with thermo-chemical...
Purpose: The motivation of present investigation is the study of deformation-induced processes during in-situ tensile and compression test at elevated temperature in order to elucidate the role of the microstructure changes during creep testing. Design/methodology/approach: Experiments were conducted to investigate deformation-induced processes during in-situ tensile test at elevated temperature....
Purpose: This paper deals with rolling mill process control and optimizations using mathematical model. Design/methodology/approach: The rolling process is very complex with high demand for energy, material and equipment. Furthermore, rolling mill requires precise setup to be able to roll specific material. Therefore, rolling mill model system is required in most production, research and development...
Purpose: Study aims to investigate the elastic properties of porous Si3N4 thus three different starch type as pore former additives were used to obtain different pore characteristics. Design/methodology/approach: Porous Si3N4 ceramics were fabricated by partial sintering and pore former addition. Pore formers consisted of elliptic, round and angular particles were used. Elastic, shear and bulk moduli...
Purpose: The main goal of present study is try to find the influence of severe plastic deformation using the ECAP (equal channel angular pressing) process and different processing routes on structure formation, properties and lattice strain of EN AC 51100 alloy. Design/methodology/approach: The cold ECAP behaviour was determined using three different processing routes A, Bc and C and four repetitive...
Purpose: Theory of construction similarity has its roots in the theory of physical similarity. The model in the theory of construction similarity is a model construction. Model in the theory of similarity of construction and technology is construction and technology standard. Design/methodology/approach: The fundamental aim of the work is the selection of design features in particular type sizes of...
Purpose of this paper: The presentation of the results of empirical research in the leading automotive companies in Poland. The study concerned the quality management system in those organizations. In this study, there were presented chosen research results in terms of used tools, methods and thinking for quality management system (QMS) in those companies. Design/methodology/approach: The studies...
Purpose: of this paper is experimental investigation of damping properties of unidirectionally and fabric reinforced plastics by the free decay method. Design/methodology/approach: For the evaluation of the presumed effect experimental structural dynamic investigations comparing unidirectionally and fabric reinforced plastics are carried out. In detail the free decay behaviour of flat beamlike specimens...
Purpose: The paper presents the results of research on the microstructure changes of two grade of duplex cast steels with a varying carbon, with and without addition of copper. Design/methodology/approach: The addition of copper have a significant effect on the microstructure of analyzed cast steels. The changes in the mechanism of solidification was also observed during numerical simulation made...
Purpose of this paper: This paper presents a comparison of the oxyfuel flame cutting and plasma cutting in economic terms. The cutting method you can choose depends on the type, thickness and amount of metal you need to cut as well as the cut quality you require. The cost estimation is also critical. In order to obtain maximum of technical and economical efficiency, in these cases, very important...
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