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Wyszukujesz frazę "Palček, P." wg kryterium: Autor


Wyświetlanie 1-8 z 8
Tytuł:
Changes in hardness of magnesium alloys due to precipitation hardening
Autorzy:
Oršulová, T.
Palček, P.
Powiązania:
https://bibliotekanauki.pl/articles/111838.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
magnesium alloy
precipitation
changes in hardness
heat treatment
stopy magnezu
utwardzanie wydzieleniowe
obróbka cieplna
pomiar twardości
Opis:
This paper deals with the evaluation of changes in hardness of magnesium alloys during precipitation hardening that are nowadays widely used in different fields of industry. It focuses exactly on AZ31, AZ61 and AZ91 alloys. Observing material hardness changes serves as an effective tool for determining precipitation hardening parameters, such as temperature and time. Brinell hardness measurement was chosen based on experimental needs. There was also necessary to make chemical composition analysis and to observe the microstructures of tested materials. The obtained results are presented and discussed in this paper.
Źródło:
Production Engineering Archives; 2018, 18; 46-49
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of cyclic loading on the internal damping of magnesium alloy AZ31
Autorzy:
Uhricik, M.
Dresslerova, Z.
Palcek, P.
Powiązania:
https://bibliotekanauki.pl/articles/111710.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
magnesium alloy
resonant frequency
internal damping
cyclic loading
stop magnezu
częstotliwość rezonansowa
tłumienie wewnętrzne
cykliczne ładowanie
Opis:
The article focuses on the analysis of the internal damping changes depending on the amplitude of the magnesium alloy AZ31. Internal damping reflects the ability of the material irreversibly dissipating mechanical energy oscillations. It means that the material of high internal damping ability is able to significantly reduce the vibration amplitude. Internal damping is, generally, dependent on many factors (temperature, material purity, grain size, mechanical and thermal processing, etc.) and its value is determined by interactions between various mechanisms dissipation of mechanical energy. Ultrasonic resonance method was used in experimental measurements, which is based on continuous excitation of oscillations of the specimen, and the entire apparatus vibrates at a frequency which is near to the resonance. Starting resonance frequency for all measurements was about f = 20470 Hz.
Źródło:
Production Engineering Archives; 2017, 15; 7-10
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of plastic deformation on the magnetic properties of selected austenitic stainless steels
Autorzy:
Orsulova, T.
Palcek, P.
Kudelcik, J.
Powiązania:
https://bibliotekanauki.pl/articles/112078.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
plastic deformation
austenite
stainless steel
magnetic properties
odkształcenia plastyczne
austenit
stal nierdzewna
właściwości magnetyczne
Opis:
Austenitic stainless steels are materials, that are widely used in various fields of industry, architecture and biomedicine. Their specific composition of alloying elements has got influence on their deformation behavior. The main goal of this study was evaluation of magnetic properties of selected steels, caused by plastic deformation. The samples were heat treated in different intervals of temperature before measuring. Then the magnetic properties were measured on device designed for measuring of magnetism. From tested specimens, only AISI 304 confirmed effect of plastic deformation on the magnetic properties. Magnetic properties changed with increasing temperature.
Źródło:
Production Engineering Archives; 2017, 14; 15-18
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Change of internal friction on aluminium alloy EN AC 51200 depending on temperature
Autorzy:
Uhricik, M.
Dresslerova, Z.
Soviarova, A.
Palcek, P.
Powiązania:
https://bibliotekanauki.pl/articles/111941.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
aluminium alloy
resonant frequency
internal friction
temperature
stop aluminium
częstotliwość rezonansowa
częstotliwość rezonansowatarcie wewnętrzne
temperatura
Opis:
The article is focused on the analysis of changes in the dependence on temperature on the aluminium alloy EN AC 51200 (10,1% Mg, 1,32% Si and 0,43% Mn) by internal friction. Internal friction is a property of the material measured on the ultrasonic resonant apparatus at a frequency of about f = 20470 Hz. The measured temperature range was from 50 °C up to 420 °C. The precise measurement of the internal friction can be monitored on an ongoing process by structural changes and various mechanisms that prevent these changes.
Źródło:
Production Engineering Archives; 2015, 6, 1; 17-20
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Properties of EN AC 51200 Aluminum Alloy
Autorzy:
Uhríčik, M.
Palček, P.
Chalupová, M.
Hanusová, P.
Kuchariková, L.
Powiązania:
https://bibliotekanauki.pl/articles/356674.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
Al-Mg cast alloy
three-point bending loading
fatigue
fracture surface
Opis:
The article will be focused on analysis of properties of aluminum alloy for the casting of type Al-Mg. As an experimental material was used aluminum alloy EN AC 51200, supplied in a cast state without a heat treatment. It was produced by the continuous casting method. Experiments deal with microstructural material analysis, fractographic analysis, mechanical and fatigue tests. The microstructure of the testing sample was examined using an optical microscope Neophot 32. Fatigue properties of aluminum alloy was tested by three-point bending cyclic loading. The fracture surface of the testing sample was examined using scanning electron microscopy (SEM), where sample was observed on various stages of the fatigue process, its characteristics and differences of fracture surfaces.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 4; 1437-1445
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of welded joint quality on safety and reliability in operation
Autorzy:
Bokuvka, O.
Liptakova, T.
Palcek, P.
Chalupova, M.
Trsko, L.
Powiązania:
https://bibliotekanauki.pl/articles/111736.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
rails
pipes
welded joint
defects
fractures
causes
szyny
rury
złącza spawane
wady
pęknięcia
przyczyny
Opis:
The quality of welded joint is an assumption of long-term reliability in operation. On the contrary, defective work of bad quality welded joint leads to fracture and crashes of plants. In this paper the authors state that experimentally obtained causes of rails and pipes fractures were the result of bad realization of welded joint. Pores, blowholes, slags, lack of fusion, non-plastic non-metallic particles, cracks, shrink holes were the defects observed in the welded joint area. These defects substantially decreased the load-bearing cross section and the final result was fracture. The railway and high-pressure gas lines out of operation are undesirable and accompanied by considerable financial losses.
Źródło:
Production Engineering Archives; 2013, 1, 1; 6-9
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of the Structure on the Fatigue Properties of Al-Mg Cast Alloy
Autorzy:
Uhríčik, M.
Palček, P.
Chalupová, M.
Oravcová, M.
Frkáň, M.
Powiązania:
https://bibliotekanauki.pl/articles/352607.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Mg cast alloy
three-point bending loading
fatigue property
fracture surface
structure
Opis:
The article will be focused on monitoring the influence of the structure on the fatigue properties of aluminium alloys for the casting of type Al-Mg. As an experimental material were used aluminium alloys EN AC 51200 and EN AC 51500, supplied in a cast state without a heat treatment. They were produced by the continuous casting method. These alloys were selected on the basis of the chemical composition, where the content of most alloying elements is comparable, only in the case of the concentration of magnesium are these alloys significantly different. Fatigue properties of aluminium alloys were tested by three-point bending cyclic loading. The fracture surface of the testing sample was examined using scanning electron microscopy (SEM), where samples were observed on various stages of the fatigue process, their characteristics and differences of fracture surfaces.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 3; 1615-1624
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Superplastic Behaviour of an Extruded AZ91 Alloy
Autorzy:
Trojanová, Z.
Turba, K.
Száraz, Z.
Ryspaev, T.
Palček, P.
Chalupová, M.
Powiązania:
https://bibliotekanauki.pl/articles/1419006.pdf
Data publikacji:
2012-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Bx
62.20.fq
Opis:
Plastic deformation of extruded AZ91 magnesium alloy was investigated at various strain rates and in a temperature range of 360-420°C. Samples exhibiting superplastic behaviour were prepared with different thermo-mechanical treatments. Microstructure of samples was observed by light and scanning electron microscopy. The strain rate sensitivity parameter m has been estimated by the abrupt strain rate change method. Possible physical mechanisms of the superplastic flow are discussed.
Źródło:
Acta Physica Polonica A; 2012, 122, 3; 597-600
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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