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Wyświetlanie 1-15 z 17
Tytuł:
Microstructure and Properties of Magnesium Alloy AZ61 After Extrusion with KoBo Method
Autorzy:
Bednarczyk, I.
Powiązania:
https://bibliotekanauki.pl/articles/354461.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
AZ61 magnesium alloy
KoBo method extrusion
static tensile test
microstructure
plastic deformation
Opis:
The article presents tests results of metalforming of magnesium alloy AZ61. Materials for tests were ingots sized ϕ 40×90 mm from magnesium alloy marked with symbol AZ61. Before the shaping process the ingots underwent heat treatment. As a result of conduction of the deformation processes there were rods achieved with diameter of 8 mm. There were axisymmetrical compression tests conducted on the samples taken from rods in temperature range from RT to 350ºC in order to determine the plasticity and formability of the alloy AZ61. Static tensile test was conducted in room temperature (RT), in 300ºC and in 350ºC. With the use of light and electron microscopy techniques the changes which occurred in the microstructure of AZ61 alloy in initial condition and after plastic deformation (classic extrusion, KoBo method extrusion) were described. The deformation of alloy AZ61 using the KoBo method contributes to an increase in strength and plastic properties. The effect of superplastic flow was found at a temperature of 350ºC, where a 300% increase in plastic properties – elongation value was obtained. The analysis of the microstructure showed a significant grain size reduction in the microstructure of alloy AZ61 after deformation by the KoBo method and after anaxisymmetric compression test, where grains of an average diameter of d = 13 μm were obtained.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 3; 1125-1130
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plasticity of low aluminum alloys from Fe-Al system
Plastyczność niskoaluminiowych stopów z układu Fe-Al
Autorzy:
Bednarczyk, I.
Jabłońska, M.
Powiązania:
https://bibliotekanauki.pl/articles/354642.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stopy Fe-Al
próba ściskania na gorąco
mikrostruktura
substruktura
Fe-Al alloys
hot compression test
microstructure
substructure
Opis:
Alloys based on intermetallic phases from the Fe-Al system they belong to a group of high-temperature creep resisting materials of advantageous physicochemical and mechanical properties at an elevated and high temperature. In general, limitation on the capacity for a broad application of intermetals from the Fe-Al system, e.g. as an alternative to expensive alloy steels of specific properties, is their insufficient plasticity, which is a factor inhibiting further their development as constructional materials. The aim of this work is study about the analysis of the influence of hot deformation parameters like a temperature and strain rate on the plasticity and structure changes in alloys on the base Fe-Al system. These alloys are competitive for their cost and properties in comparison with stainless and acid resistance steels. Were analyzed the properties determined in hot compression test of cast alloys Fe-28Al, Fe-28Al-5Cr, contain microelements Mo, Zr, C, B. The tests were carried out on the range of temperature 700°C - 1100°C with strain rate 0,1 s-1. The results indicated that the Cr addition had an positively effect on the plasticity properties. Moreover exhibited that the Cr addition had an influence on the mechanism of the rebuilding the structure changes.
Stopy na osnowie faz międzymetalicznych z układu Fe-Al, zaliczane są do grupy tworzyw żarowytrzymałych, posiadających korzystne właściwości fizykochemiczne i mechaniczne. Zasadniczym problemem ograniczającym ich powszechne stosowanie jest niska plastyczność i skłonność do kruchego pękania co powoduje zahamowanie w dalszym rozwoju jako materiałów konstrukcyjnych. Celem tej pracy jest ocean wpływu parametrów takich jak temperatura, prędkość odkształcenia na plastyczność i zmiany struktury stopów z układu Fe-Al. Ze względu na niski koszt oraz właściwości są konkurencyjne w porównaniu do stali nierdzewnych i kwasoodpornych. Analizowano właściwości w próbie ściskania na gorąco dla odlewniczych stopów Fe-28Al, Fe-28Al-5Cr, zawierających mikrododatki Mo, Zr, C, B. Próby były prowadzone w zakresie temperatury 700 ÷ 1100°C z prędkością odkształcenia 0,1 s-1. Wyniki wskazują, że mikrododatek Cr ma zdecydowany wpływ na właściwości plastyczne. Dodatkowo mikrododatek Cr ma wpływ na zmianę mechanizmu odbudowy struktury.
Źródło:
Archives of Metallurgy and Materials; 2012, 57, 1; 271-276
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Microstructure and Mechanical Properties of Magnesium Alloys Mg-Li-RE After the Process of Casting and Extrusion
Autorzy:
Bednarczyk, I.
Kuc, D.
Mikuszewski, T.
Powiązania:
https://bibliotekanauki.pl/articles/353094.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ultra-light Mg-Li-RE alloys
extrusion process
microstructure
mechanical properties
Opis:
The article presents tests results of the influence of extrusion process on the microstructure and mechanical properties of magnesium alloy with lithium and rare earth elements with symbols LAE442 and LAE842. Microstructures of magnesium alloys after extrusion were compared with microstructure after casting and homogenisation. Presented results show the mechanical properties marked in static compression test in room temperature. It was stated that alloy LAE842 is characterised with better plasticity than the alloy LAE442.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 1; 35-38
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantitative Evaluation of the Microstructure and Mechanical Properties of Hot Rolled 23MnB4 Steel Grade for Cold Upsetting
Autorzy:
Kuc, D.
Szala, J.
Bednarczyk, I.
Powiązania:
https://bibliotekanauki.pl/articles/350971.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
23MnB4 steel
hot rolling
microstructure
quantitative metallography
grain size
Opis:
The article presents the results of tests of influence of the thermo-mechanical treatment parameters on the mechanical properties and microstructure of steel 23MnB4 for cold-upsetting. Measurements of the ferrite grains and pearlite colonies were conducted with the use of Met-Ilo program supplemented by additional procedures dedicated to structure analysis of ferritic-pearlitic steel. The process of rolling was conducted in simulation in semi-continuous finishing train arrangement with different temperature and cooling rate. Elaborated procedure of quantitative analysis of microstructure and conducted mechanical properties tests will be used during preparations of modified technologies of wire rod rolling to prepare products made of steel, the microstructure of which is characterised higher utility properties.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2A; 551-556
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Cumulative Plastic Deformation on Microstructure of the Fe-Al Intermetallic Phase Base Alloy
Wpływ skumulowanego odkształcenia plastycznego na strukturę stopów Fe-Al na osnowie faz międzymetalicznych
Autorzy:
Bednarczyk, I.
Kuc, D.
Niewielski, G.
Powiązania:
https://bibliotekanauki.pl/articles/350991.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
FeAl alloy
Max train simulator
cumulative plastic deformation
microstructure
stop Fe-Al
symulator MaxStrain
skumulowane odkształcenie plastyczne
mikrostruktura
Opis:
This article is part of the research on the microstructural phenomena that take place during hot deformation of intermetallic phase-based alloy. The research aims at design an effective thermo - mechanical processing technology for the investigated intermetallic alloy. The iron aluminides FeAl have been among the most widely studied intermetallics because their low cost, low density, good wear resistance, easy of fabrication and resistance to oxidation and corrosion. There advantages create wide prospects for their industrial applications for components of machines working at a high temperature and in corrosive environment. The problem restricting their application is their low plasticity and their brittle cracking susceptibility, hampers their development as construction materials. Consequently, the research of intermetallic-phase-based alloys focuses on improvement their plasticity by hot working proceses. The study addresses the influence of deformation parameters on the structure of an Fe-38% at. Al alloy with Zr, B Mo and C microadditions, using multi – axis deformation simulator. The influence of deformation parameters on microstructure and substructure was determined. It was revealed that application of cumulative plastic deformation method causes intensive reduction of grain size in FeAl phase base alloy.
Prezentowana praca stanowi element prowadzonych badań nad możliwością kształtowania stopów na osnowie faz międzymetalicznych z układu Fe-Al drogą obróbki cieplno-plastycznej. Związki międzymetaliczne są traktowane jako przyszłościowe materiały do pracy w wysokich temperaturach i agresywnych środowiskach korozyjnych. Zainteresowanie tą grupą materiałową jest spowodowane dobrymi właściwościami użytkowymi: dobrą odpornością na utlenianie i korozję w środowisku wody morskiej, zużycie ścierne. Ponadto niskie koszty materiałowe stwarzają perspektywy do zastosowań jako alternatywę dla stali odpornych na korozję. Ograniczeniem możliwości szerokiego zastosowania intermetalików z układu Fe-Al, jest ich niedostateczna plastyczność, będąca czynnikiem hamującym ich dalszy rozwój jako materiałów konstrukcyjnych. Stąd badania nad możliwością poprawy plastyczności droga obróbki cieplno-plastycznej. W artykule analizowano wpływ parametrów odkształcania na mikrostrukturę stopu Fe-38% at. Al z mikododatkami cyrkonu, molibdenu, boru węgla. Z wykorzystaniem symulatora Maxstrain, który umożliwa kumulację dużych odkształceń w materiale. Przeprowadzono badania mikrostuktury i substruktury wykazały istotny wpływ odkształcania tą metodą na rozdrobnienie ziarn w badanym stopie.
Źródło:
Archives of Metallurgy and Materials; 2014, 59, 3; 987-991
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Plastic Deformation Process on the Structure and Properties of Alloy WE43
Autorzy:
Bednarczyk, I.
Mrugała, A.
Tomaszewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/356215.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
alloy WE43
microstructure
tensile test
fractographic analysis of fractures
Opis:
The paper describes the results of structure and properties tests of flat bars made of alloy WE43 obtained in the process of extrusion with the use of KOBO method. An analysis of structure changes was conducted both in initial state and after plastic deformation. A quantitative analysis of the material was also conducted with the use of METILO program. The paper also presents results of mechanical tests marked in the uniaxial tensile testing in room temperature and in elevated temperature for achieved flat bars. Fractographic tests were conducted after tensile test in order to determine the mechanism of cracking.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 389-392
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of chlorophenoxy herbicides residues on probing behavior of cereal aphid
Wpływ pozostałości herbicydów chlorofenoksyoctowych na żerowanie mszyc zbożowych
Autorzy:
Krzyżanowski, R.
Bednarczyk, I.
Cudziło-Abramczuk, J.
Powiązania:
https://bibliotekanauki.pl/articles/13108595.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Źródło:
Agronomy Science; 2018, 73, 3; 29-36
2544-4476
2544-798X
Pojawia się w:
Agronomy Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Extrusion in the Complex Strain State on the Microstructure and Mechanical Properties of MgAlZn Magnesium Alloys
Autorzy:
Bednarczyk, I.
Kuc, D.
Tomaszewska, A.
Tkocz, M.
Powiązania:
https://bibliotekanauki.pl/articles/353998.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnesium alloys
KoBo method
microstructure
electron microscope
shape factor
Opis:
The paper presents the results of tests concerning the effect of the extrusion process in the complex strain state on the microstructure and properties of one of magnesium alloy with aluminium, zinc and manganese, designated AZ61. Due to its specific gravity, it is increasingly being used in the automotive and aerospace industries to reduce the weight of structural elements. As a result of plastic deformation processes, rods with a diameter of 8, 6 and 4 mm were obtained from AZ61 magnesium alloy. The microstructure analysis was performed using light and electron microscopy (STEM) techniques in the initial state and afterplastic deformation. Microstructure studies were supplemented with a quantitative analysis using the Metilo program. A number of stereological parameters were determined: average diameter of grain, shape factor. A static tensile test was carried out at 250ºC and 300ºC, at deformation rates of 0.01, 0.001 and 0.0001 m·s-1. Better plastic properties after deformation using KoBo methodwere obtained than with conventional extrusion.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 3; 1121-1128
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the DRECE Process of Severe Plastic Deformation on the Mechanical Properties of the Ultra-Low Carbon Interstitial Free Steel
Autorzy:
Kowalczyk, K.
Jabłońska, M.
Rusz, S.
Bednarczyk, I.
Powiązania:
https://bibliotekanauki.pl/articles/352805.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sheet metal
high strength steel
interstitial free steel
SPD process
Opis:
This research paper shows the influence of a repeated SPD (Severe Plastic Deformation) plastic forming with the DRECE technique (Dual Rolls Equal Channel Extrusion) on hardening of low carbon IF steel. The influence of number of passes through the device on change of mechanical properties, such as tensile strength TS and yield stress YS, of tested steel was tested. The developed method is based on equal channel extrusion with dual rolls and uses a repeated plastic forming to refinement of structure and improve mechanical properties of metal bands [1-2]. For the tested steel the increase of strength properties after the DRECE process was confirmed after the first pass in relation to the initial material. The biggest strain hardening is observed after the fourth pass.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 2095-2100
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature Dependences of Optical Energy Gaps of SbSI@CNT and SbSeI@CNT
Autorzy:
Jesionek, M.
Nowak, M.
Kępińska, M.
Bednarczyk, I.
Powiązania:
https://bibliotekanauki.pl/articles/1399102.pdf
Data publikacji:
2013-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.67.Ch
62.23.Hj
78.67.Uh
81.07.Gf
Opis:
This paper presents for the first time temperature dependences of optical energy gaps of SbSI@CNT and SbSeI@CNT, i.e. carbon nanotubes (CNTs) filled with antimony sulfoiodide (SbSI) and antimony selenoiodide (SbSeI). The heterostructures were prepared sonochemically using CNTs and elemental Sb, S or Se and I in the presence of solvent under ultrasonic irradiation. Spectral characteristics of diffusive transmittance and reflectance of SbSI@CNT and SbSeI@CNT were measured in temperature range 274 K < T < 333 K. The determinal temperature dependence of indirect forbidden optical energy gap of SbSI@CNT has been fitted with $E_\text{gIf} (T) = (1.92(2)-3.6(6) \times 10^{-4} \times T) eV$. Indirect allowed optical energy gap of SbSeI@CNT has been fitted with $E_\text{gIa} (T) = (1.817(5)-7.1(2) \times 10^{-4} × T) eV$.
Źródło:
Acta Physica Polonica A; 2013, 124, 5; 836-837
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Deformation Method on the Microstructure and Properties of Magnesium Alloy WE43
Autorzy:
Bednarczyk, I.
Kuc, D.
Tkocz, M.
Tomaszewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/353617.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnesium alloys
SPD method
microstructure
static tensile test
Opis:
The article presents tests results of the influence of deformation methods on the microstructure and properties of alloy WE43. There were direct extrusion tests and extrusion with KoBo method performed. An assessment of the influence of the methods of deformation on the microstructure and the mechanical properties of the achieved rods from alloy WE43 was conducted. There was an analysis of microstructure carried out with the use of light and scanning microscopy techniques in the initial state and after plastic deformation. Static tensile test was conducted in temperature of 350°C at a speed of 0.0001 m·s-1 and microhardness measurements were performed of HV0.2. On the basis of the achieved mechanical tests results it was stated that in the temperature of 350°C for samples deformed with the use of KoBo method there was an effect of superplastic flow found. The value of elongation achieved was 250% which was 3 times higher than in case of classic extrusion (80%).
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1975-1980
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Extrusion Process on the Microstructure and Mechanical Properties of Magnesium Alloys
Autorzy:
Bednarczyk, I.
Kuc, D.
Tomaszewska, A.
Mrugała, A.
Powiązania:
https://bibliotekanauki.pl/articles/958196.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnesium alloys
microstructure
mechanical properties
process of extrusion method KOBO
Opis:
The article presents the results of plastic shaping tests of AZ61 and WE43 alloys. There were both classic extrusion tests as well as extrusion tests of KOBO method. An assessment was made of the influence of extrusion process parameters on the mechanical properties and the structure of the alloys. On the basis of achieved results of mechanical properties for alloys AZ31 and WE43 the susceptibility of those alloys to plastic shaping was determined. Quantitative tests of structure assessment in case of alloys AZ61 and WE43 after extrusion with the use of KOBO method were conducted with the use of METILO program. It has been shown that extrusion AZ61,WE43 alloys method KOBO leads to considerable fragmentation of grains.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2A; 545-550
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deformation microstructures in metallic materials after severe plastic deformation by rolling with cyclic movement of rolls
Autorzy:
Urbańczyk-Gucwa, A.
Bednarczyk, I.
Jabłońska, M.
Rodak, K.
Powiązania:
https://bibliotekanauki.pl/articles/1075888.pdf
Data publikacji:
2016-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
62.20.F-
61.72.Ff
81.05.Bx
81.40.Rs
83.50.-v
Opis:
The results of the microstructure investigations of the pure Al and AlMg5 alloy and pure Cu and CuFe2 alloy after the application of severe plastic deformation implemented by rolling with the cyclic movement of the rolls are presented in this paper. The rolling with the cyclic movement of the rolls was carried out at values: the rolling rate v=1 rpm, the frequency of rolls movement f=1 Hz, the amplitude of rolls movement A=1.6 mm. Maximal values of rolling reduction at 6 passes was ε_{h}=80%. The structure of the these materials was analyzed using scanning transmission electron microscope. The quantitative studies of the substructure was performed with MET-ILO software, on the basis of images acquired on scanning transmission electron microscope. Performed substructure investigations showed that using the rolling with the cyclic movement of the rolls method can refine the microstructure of these materials to the ultrafine scale.
Źródło:
Acta Physica Polonica A; 2016, 130, 4; 975-978
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of dislocation substructures in high-Mn steels after dynamic deformation tests
Autorzy:
Śmiglewicz, A.
Moćko, W.
Rodak, K.
Bednarczyk, I.
Jabłońska, M.
Powiązania:
https://bibliotekanauki.pl/articles/1058094.pdf
Data publikacji:
2016-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Bx
81.40.-z
68.37.Ma
46.70.-p
Opis:
The article presents the dynamic mechanical properties of two types of high manganese austenitic TWIP steels. The investigations were carried out for the wide range of strain rates from 10¯² s¯¹ up to 4×10³ s¯¹ using servo-hydraulic testing machine and split Hopkinson bar for the quasi-static and dynamic loading regime, respectively. The mechanical properties at different strain rates like yield strength and true stress were calculated out on the base of the results of impact tests. In the next step, the microstructure of the analyzed steels after different deformation rates were observed by scanning transmission electron microscopy technique in order to disclose a dislocation structures and mainly the TWIP effect. In the studies observed that with the strain rate increasing yield strength as well as true stress for 0.3 true strain increasing in both steels. The microstructure observations reveal the influence of strain rate on the structure evolution for analyzed steels.
Źródło:
Acta Physica Polonica A; 2016, 130, 4; 942-945
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication of SbSI Photonic Crystals
Autorzy:
Starczewska, A.
Szperlich, P.
Nowak, M.
Bednarczyk, I.
Bodzenta, J.
Szala, J.
Powiązania:
https://bibliotekanauki.pl/articles/1376062.pdf
Data publikacji:
2014-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.70.Qs
77.84.-s
78.40.Fy
Opis:
Semiconducting ferroelectric antimony sulfoiodide (SbSI) photonic crystals were fabricated. The $SiO_{2}$ nanospheres were synthesized and gravity sedimented to obtain opal matrices. These opals were infiltrated with melted SbSI and etched in HF acid to produce inverted SbSI opals.
Źródło:
Acta Physica Polonica A; 2014, 126, 5; 1118-1120
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
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