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Tytuł:
Symulacja obróbki plastycznej materiałów inżynierskich z wykorzystaniem symulatora Gleeble 3800
Autorzy:
Borek, W.
Powiązania:
https://bibliotekanauki.pl/articles/273797.pdf
Data publikacji:
2017
Wydawca:
Roble
Tematy:
materiały inżynierskie
charakterystyki materiałowe
obróbka plastyczna
Gleeble 3800
symulacja obróbki cieplno-plastycznej
engineering materials
material characteristics
plastic working
machining simulation
Źródło:
LAB Laboratoria, Aparatura, Badania; 2017, 22, 4; 24-29
1427-5619
Pojawia się w:
LAB Laboratoria, Aparatura, Badania
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metalowo-szklane ściany osłonowe i przekrycia dachowe. Cz.1
Practical aspects of designing and monitoring of metal-glass curtain wall and roof
Autorzy:
Jakimowicz, M.
Borek, W.
Powiązania:
https://bibliotekanauki.pl/articles/128960.pdf
Data publikacji:
2018
Wydawca:
PWB MEDIA Zdziebłowski
Tematy:
ściana osłonowa
ściana metalowo-szklana
przekrycie dachowe
dach szklany
projektowanie
montaż
rozwiązanie konstrukcyjne
curtain wall
metal-glass facade
roofing
glass roof
designing
assembly
structural solution
Opis:
Metal-glass curtain wall s are now an inherent element of urban landscape. Due to the variety of forms, unlimited color range, high thermal and acoustic insulation, functionality dedicated not only to separating the external and internal environment they inspire admiration and delight. Their appearance can give the impression that they are uncomplicated structures. The reality is reversed. Metal-glass curtain walls are assembled from a number of functionally diverse elements. Designing the façade to meet the requirements is a complicated process where designers, architects, constructors and systems manufacturers must be involved. Very important is the stage of installation a metal-glass curtain wall. Without experienced assemblers and appropriate equipment, it is not possible to perform it correctly. For this in practice there are numerous defects arising at the design stage and at the montage stage.
Źródło:
Builder; 2018, 22, 2; 82-84, 86, 88, 90
1896-0642
Pojawia się w:
Builder
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical Properties of High-Mn Austenitic Steel Tested under Static and Dynamic Conditions
Autorzy:
Dobrzański, L. A.
Borek, W.
Mazurkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/356028.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
high manganese steels
TWIP mechanism
strain rate
mechanical properties
structure
Opis:
The purpose of the paper is to investigate X73MnSiAlNbTi25-1-3 high manganese austenitic steel containing 0.73% C to determine structural mechanisms decisive for increasing a reserve of cold deformation energy of such steel. The influence of a strain rate on the structure of the investigated steels and on the structural mechanisms decisive for their properties was analysed. Specialist research instrumentation was used for this purpose such as Scanning Transmission Microscopy (including EBSD examinations), conventional and high-resolution transmission electron microscopy together with diffraction examinations and metallographic examinations. It was found that the principal cause of an increased reserve of cold deformation energy of the investigated steels in dynamic conditions is the activation of mechanical twinning in the mutually intersecting systems in austenite grains and annealing twins, which are densifying when a cold deformation rate is growing, thereby confirming the basic mechanism of TWIP (TWinning Induced Plasticity).
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2A; 725-730
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Isothermal Heating Time on the Disappearance of Strain Hardening in High-Manganese TRIPLEX Type Steels
Autorzy:
Sozańska-Jędrasik, L.
Mazurkiewicz, J.
Borek, W.
Powiązania:
https://bibliotekanauki.pl/articles/351838.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Fe-Mn-Al-C steels
TRIPLEX steel
thermo-mechanical processing
softening degree
Opis:
The paper presents the results of the effect of isothermal heating time on the disappearance of strain hardening (the softening degree) of the studied high-manganese TRIPLEX type steels at a temperature of 900 and 1000°C. In order to determine the kinetics of recrystallization of austenite plastically deformed for selected steels, hot compression tests with draft ε = 0.2 were made. The presented results reveal that the complete recrystallization of austenite needs long isothermal heating times. In industrial conditions, such long times are not used, therefore in the initial rolling passages, the time required for half recrystallization of austenite t0.5 is often used. The total disappearance of the strain hardening, completion of the recrystallization of austenite tested high-manganese X98 and X105 TRIPLEX type steels isothermal heating time requires far more than 200 s. The increase of the deformation temperature is a factor influencing the acceleration of the disappearance of strain hardening.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 2023-2030
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Combined effects of strain and cooling path on hot deformation response and microstructure of low-carbon structural steel
Autorzy:
Morawiec, M.
Borek, W.
Mroziński, M.
Grajcar, A.
Powiązania:
https://bibliotekanauki.pl/articles/379077.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
structural steel
low-carbon steel
hot deformation
thermomechanical process
gleeble simulator
cooling path
stal konstrukcyjna
stal niskowęglowa
odkształcenie na gorąco
proces termomechaniczny
symulator Gleeble
droga ochładzania
Opis:
Purpose: The aim of the paper is to analyse the effect of thermomechanical process with different cooling paths on microstructure and mechanical properties of low-carbon structural steel. Design/methodology/approach: The steel used for the investigation was subjected to two step deformation using a Gleeble 3800 simulator and then held at designed temperatures from 650ºC to 800ºC for different times. A final step included water cooling to room temperature to freeze the microstructure. Typical microscopic studies have been done. The analysis of the volume fraction of presented phases was carried out together with the measurement of grain size by means of image analysis. The last part of conducted research was hardness analysis of the steel after the different heat treatments. Findings: It was found that the microstructure constitution and grain size are strongly dependent on the temperature of isothermal holdings. The microstructure of steel held at 800ºC is composed of the mixture of bainite and two kinds of ferrite: globular and acicular. When the temperature was lowered by 50ºC the ferrite shows the globular morphology. When the temperature drops to 700ºC and below it, the microstructure is composed of ferritic-pearlitic mixture. It was observed that when the isothermal temperature was increased the grain size decreased and the opposite effect was observed for the holding time. The longer the time of the isothermal holding, the larger was the grain size. Research limitations/implications: For better understanding of the phase transformation kinetics in this steel the dilatometric test are planned. Practical implications: The knowledge of the microstructure evolution and hot deformation response of low-carbon structural steels is important from the industrial point of view. Originality/value: The combined effects of hot deformation and different cooling paths give the useful information on a microstructure evolution.
Źródło:
Archives of Materials Science and Engineering; 2019, 95, 1; 5-11
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbides Analysis of the High Strength and Low Density Fe-Mn-Al-Si Steel
Autorzy:
Sozańska-Jędrasik, L.
Mazurkiewicz, J.
Borek, W.
Matus, K.
Powiązania:
https://bibliotekanauki.pl/articles/351736.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
high manganese steels
triplex
microstructure
isolates of carbide
carbides κ
M7C3
EBSD
Opis:
The work presents the results of investigations into the structure and phase composition of newly developed high manganese steels of the X98MnAlSiNbTi24-11 and X105MnAlSi24-11 type. The average density of such steels is 6.67 g/cm3, which is 15% lower as compared to typical structural steels. An analysis of phase composition and structure allows to conclude that the investigated steels feature an austenitic γ-Fe(Mn,Al,C) structure with uniformly distributed and elongated α-Fe(Mn,Al) ferrite grains on the boundaries of austenite grains and carbides. Examinations by diffraction of back scattered electrons (EBSD) allow to conclude that high-angle boundaries dominate in such steels, having significant influence on mechanical properties. Three types of carbides with differentiated chemical composition and size were identified in steel X98MnAlSiNbTi24-11 with scanning and transmission electron microscopy. κ-(Fe,Mn)3AlC carbides, having a regular, face-centered cubic lattice (fcc), were identified in austenite. Transmission electron microscopy examinations have enabled to identify M7C3-type carbide in ferrite. Nb- and Ti-based complex carbides were identified in steel X98MnAlSiNbTi24-11, both, in ferrite and austenite. (NbTi)C2 carbide precipitates were confirmed in an X-ray qualitative phase analysis. The size of the above-mentioned carbides is within several to several dozens of μm. An X-ray qualitative phase analysis has confirmed the precipitates of M7C3 carbides in both steels.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 1; 265-276
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of plastic deformation rate at room temperature on structure and mechanical properties of high-Mn austenitic Mn-Al-Si 25-3-3 type steel
Autorzy:
Borek, W.
Lis, M.
Gołombek, K.
Sakiewicz, P.
Piotrowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/378652.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
high-Mn steel
TWIP type steel
plastic deformation
twinning
dynamic deformation
structure
mechanical properties
stal wysokomanganowa
stal TWIP
odkształcenie plastyczne
bliźniakowanie
odkształcenie dynamiczne
struktura
własności mechaniczne
Opis:
Purpose: The aim of the paper is to determine influence of plastic deformation rate at room temperature on structure and mechanical properties of high-Mn austenitic Mn-Al-Si 25-3-3 type steel tested at room temperature. Design/methodology/approach: Mechanical properties of tested steel was determined using Zwick Z100 static testing machine for testing with the deformation speed equal 0.008 s-1, and RSO rotary hammer for testing with deformation speeds of 250, 500 and 1000s-1. The microstructure evolution samples tested in static and dynamic conditions was determined in metallographic investigations using light microscopy as well as X-ray diffraction. Findings: Based on X-ray phase analysis results, together with observation using metallographic microscope, it was concluded, that the investigated high-Mn X13MnAlSiNbTi25-3-3 steel demonstrates austenitic structure with numerous mechanical twins, what agrees with TWIP effect. It was demonstrated, that raise of plastic deformation rate produces higher tensile strength UTS and higher conventional yield point YS0.2. The UTS strength values for deformation rate 250, 500 and 1000 s-1 grew by: 35, 24 and 31%, appropriately, whereas in case of YS0.2 these were: 7, 74 and 130%, accordingly, in respect to the results for the investigated steel deformed under static conditions, where UTS and YS0.2 values are 1050 MPa and 700 MPa. Opposite tendency was observed for experimentally measured uniform and total relative elongation. Homogeneous austenitic structure was confirmed by X-ray diffractometer tests. Research limitations/implications: To fully describe influence of strain rates on structure and mechanical properties, further investigations specially with using transmission electron microscope are required. Practical implications: Knowledge about obtained microstructures and mechanical properties results of tested X13MnAlSiNbTi25-3-3 steel under static and dynamic conditions can be useful for the appropriate use of this type of engineering material in machines and equipment susceptible to static or dynamic loads. Originality/value: The influence of plastic deformation at room temperature under static and dynamic conditions of new-developed high-manganese austenitic X13MnAlSiNbTi25-3-3 steels were investigated.
Źródło:
Archives of Materials Science and Engineering; 2019, 96, 1; 22-31
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Laser Feeding on Heat Treated Aluminium Alloy Surface Properties
Autorzy:
Labisz, K.
Tański, T.
Janicki, D.
Borek, W.
Lukaszkowicz, K.
Dobrzański, L. A.
Powiązania:
https://bibliotekanauki.pl/articles/353371.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
manufacturing and processing
ceramic powder
laser surface treatment
aluminium alloys
HPDL laser
Opis:
In this paper are presented the investigation results concerning microstructure as well as mechanical properties of the surface layer of cast aluminium-silicon-copper alloy after heat treatment alloyed and/ or remelted with SiC ceramic powder using High Power Diode Laser (HPDL). For investigation of the achieved structure following methods were used: light and scanning electron microscopy with EDS microanalysis as well as mechanical properties using Rockwell hardness tester were measured. By mind of scanning electron microscopy, using secondary electron detection was it possible to determine the distribution of ceramic SiC powder phase occurred in the alloy after laser treatment. After the laser surface treatment carried out on the previously heat treated aluminium alloys, in the structure are observed changes concerning the distribution and morphology of the alloy phases as well as the added ceramic powder, these features influence the hardness of the obtained layers. In the structure, there were discovered three zones: the remelting zone (RZ) the heat influence zone (HAZ) and transition zone, with different structure and properties. In this paper also the laser treatment conditions: the laser power and ceramic powder feed rate were investigated. The surface laser structure changes in a manner, that there zones are revealed in the form of. This carried out investigations make it possible to develop, interesting technology, which could be very attractive for different branches of industry.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2A; 741-746
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Nb and Ti micro-additives and thermo-mechanical treatment of high-manganese steels with aluminium and silicon on their microstructure and mechanical properties
Autorzy:
Sozańska-Jędrasik, L.
Mazurkiewicz, J.
Borek, W.
Matus, K.
Chmiela, B.
Zubko, M.
Powiązania:
https://bibliotekanauki.pl/articles/353026.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
high-manganese steels
TRIPLEX
microstructure
ĸ carbides
M7C3
EBSD
Nb and Ti micro-additives
grain size
Opis:
The results are based on two experimental high-manganese X98MnAlSiNbTi24-11 and X105MnAlSi24-11 steels subjected to thermo-mechanical treatment by hot-rolling on a semi-industrial processing line. The paper presents the results of diffraction and structural studies using scanning and transmission electron microscopy showing the role of Nb and Ti micro-additives in shaping high strength properties of high-manganese austenitic-ferritic steels with complex carbides. The performed investigations of two experimental steels allow to explain how the change cooling conditions after thermo-mechanical treatment of the analysed steels affects the change of their microstructure and mechanical properties. The obtained results allow assessing the impact of both the chemical composition and the applied thermo-mechanical treatment technology on the structural effects of strengthening of the newly developed steels.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 1; 133-142
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Free Volume in Plastified Poly(Vinyl Chlorate)
Autorzy:
Borek, J.
Osoba, W.
Powiązania:
https://bibliotekanauki.pl/articles/1933477.pdf
Data publikacji:
1995-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.60.+z
78.70.Bj
Opis:
Positron lifetimes measurements in pure poly(vinyl chlorate) (PVC) and in plastified PVC were performed. Three different plasticizers were used: dibutyl phtalate, dioctyl phtalate and tricresyl phosphate. The measured samples were prepared of PVC with two different plasticizers concentration (20% and 30% of the plasticizers in the poly(vinyl chlorate)). All the measurements were performed in air at room temperature. A conventional fast-slow coincidence lifetime spectrometer was used for the measurements. Free volume radii were calculated from the lifetime data.
Źródło:
Acta Physica Polonica A; 1995, 88, 1; 91-95
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problem występowania cyjanowodoru w gazie koksowniczym
Autorzy:
Mniszek, W.
Borek, R.
Powiązania:
https://bibliotekanauki.pl/articles/370727.pdf
Data publikacji:
2009
Wydawca:
Wyższa Szkoła Zarządzania Ochroną Pracy w Katowicach
Tematy:
cyjanowodór
benzol
gaz koksowniczy
hydrogen cyanide
benzol production
coke oven gas
Opis:
Obecność cyjanowodoru w oczyszczonym gazie koksowniczym może być przyczyną rozpuszczania się cyjanowodoru w wodzie separatorowej przy produkcji benzolu. Celem pracy było badanie stężenia cyjanowodoru w surowym i oczyszczonym gazie koksowniczym oraz ocena możliwości przedostawania się cyjanowodoru do wody separatorowej. Badania wykonano w Koksowni Radlin. Nie stwierdzono wyraźnej różnicy stężenia cyjanowodoru w gazie surowym i oczyszczonym, co stwarza warunki do rozpuszczania się cyjanowodoru w wodzie separatorowej. Badanie miało charakter wstępny i stwierdzono konieczność prowadzenia dalszych badań.
The presence of hydrogen cyanide in cleaned coke oven gas can be the cause of dissolve HCN in wash water near benzol production process. The investigation was the aim of HCN concentration determination in raw and cleaned coke oven gas as well as opinion of possibility HCN penetrating to wash water near benzol production process. Investigation was executed in Coking plant "Radlin". The difference of HCN concentrations in raw and cleaned coke oven gas was not affirmed, which creates conditions to presence of HCN in wash water. Investigation had preliminary character and the necessity of continuation investigations was affirmed.
Źródło:
Zeszyty Naukowe Wyższej Szkoły Zarządzania Ochroną Pracy w Katowicach; 2009, 1(5); 94-104
1895-3794
2300-0376
Pojawia się w:
Zeszyty Naukowe Wyższej Szkoły Zarządzania Ochroną Pracy w Katowicach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problemy oceny procedury pomiaru stężenia szkodliwych związków chemicznych w gazach odlotowych powstających podczas termicznego przekształcania odpadów przemysłowych
Problems of quality evaluation of the exhausted gas monitoring during a thermal process of waste industrial conversion
Autorzy:
Borek., R.
Gieroń, M.
Stec, W.
Powiązania:
https://bibliotekanauki.pl/articles/155060.pdf
Data publikacji:
2006
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
jakość pomiarów
składowe gazu
odpady
przygotowanie próbki
quality of measurement
gaseous components
waste composition
samples preparation
Opis:
W artykule rozpatrzono zagadnienia związane z oceną jakości pomiarów wykorzystywanych do wyznaczenia stężeń składników lotnych powstających w procesie termicznego przekształcania odpadów przemysłowych. Zwrócono uwagę na specyficzne problemy pomiaru składników gazów odlotowych. Rozważano sposób pobierania próbki gazów odlotowych i wynikające stąd błędy analizy.
In this article, problems of quality evaluation of the measurements used for designation of gaseous components concentration generated in the thermal process of waste industrial conversion have been discussed. The attention was paid to some measurement problems of the exhausted gas components when the waste composition changes at random. The method of samples preparation of the exhausted gases and errors of their analysis has been considered.
Źródło:
Pomiary Automatyka Kontrola; 2006, R. 52, nr 12, 12; 34-37
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A modified method for the determination of radioactive isotopes in building raw and construction materials with multichannel gamma spectrometry
Autorzy:
Charewicz, W.
Żebrowski, A.
Walkowiak, W.
Borek, B.
Powiązania:
https://bibliotekanauki.pl/articles/147083.pdf
Data publikacji:
2000
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
building materials
multichannel gamma-ray spectrometry
radioactive isotopes
Opis:
A modified method is presented for the determination of natural and artificial isotopes in building raws and materials using multichannel gamma-ray spectrometry. A procedure is given for the preparation of standards as well as for the determination of radioisotopes content in typical building raws and/or materials. Results of these determinations were compared with those from standard, tri-channel gamma spectrometry described in Instruction No. 234/95 [2] issued by the Institute of Building Technology in Warsaw, Poland.
Źródło:
Nukleonika; 2000, 45, 4; 243-247
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Częstość występowania naczyniowego uszkodzenia mózgu w populacji powiatu ostrowieckiego
Prevalence of vascular brain damage among inhabitants of the Ostrowiec Swietokrzyski Province
Autorzy:
Cichonska, M.
Borek, M.
Krawczyk, W.
Ilzecka, J.
Powiązania:
https://bibliotekanauki.pl/articles/3858.pdf
Data publikacji:
2012
Wydawca:
Instytut Medycyny Wsi
Źródło:
Medycyna Ogólna i Nauki o Zdrowiu; 2012, 18(47), 2
2083-4543
Pojawia się w:
Medycyna Ogólna i Nauki o Zdrowiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zasady kwalifikacji chorych do zabiegów operacyjnych z zakresu chirurgii naczyniowej
Preoperative ambulatory assessment of cardiac risk in patients qualified for vascular surgery procedures
Autorzy:
Myslinski, W.
Dybala, A.
Celinska, A.
Barud, W.
Borek, G.
Mosiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/4424.pdf
Data publikacji:
2012
Wydawca:
Instytut Medycyny Wsi
Źródło:
Medycyna Ogólna i Nauki o Zdrowiu; 2012, 18(47), 1
2083-4543
Pojawia się w:
Medycyna Ogólna i Nauki o Zdrowiu
Dostawca treści:
Biblioteka Nauki
Artykuł
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