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Wyszukujesz frazę "81.20.Vj" wg kryterium: Temat


Tytuł:
Fume Formation Rate Analysis of Shipbuilding Steel with SMAW Using Taguchi Design and ANOVA
Autorzy:
Mert, T.
Ekinci, S.
Powiązania:
https://bibliotekanauki.pl/articles/1032075.pdf
Data publikacji:
2017-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
Opis:
Shipbuilding industry grows rapidly due to the increasing growth of economies and thus, the need for new and bigger ships emerge. Manufacturing of ships in shipyards includes harmful processes, such as welding, which impact the workers and the environment. As a consequence of increase in demand for new ships, deleterious welding fume and emissions all over the world increase year by year. Welding fume includes hazardous micro and sub-micro sized metal particulates and in addition to welding fume, welding emissions consist of detrimental gaseous wastes as well. In this study, a set of experiments was designed by Taguchi method. These experiments were realized by two welders using two different types of covered electrodes (rutile and cellulosic), welding speeds and currents on Grade A shipbuilding steel, which is one of the most common steels in shipbuilding. After the experiments, fume formation rate was measured and it was observed that the contributions of the factors are 92.47%, 5.42% and 1.66% for electrode type, current and welder, respectively. The results were assessed using Taguchi and ANOVA and evaluated in terms of environment and occupational health and safety.
Źródło:
Acta Physica Polonica A; 2017, 131, 3; 495-499
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Welding Time Effect of Welding Joints in Micro Alloyed and TRIP 800 Steels in Resistance Spot Welding
Autorzy:
Onar, V.
Aslanlar, S.
Powiązania:
https://bibliotekanauki.pl/articles/1033462.pdf
Data publikacji:
2017-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
Opis:
This paper presents an analysis of resistance spot welds between micro alloyed steel sheets having 1 mm thickness and TRIP 800 (transformation-induced plasticity) steel sheets having 1.5 mm. TRIP 800 steel and micro alloyed steel sheets are used in automobile chassis and automobile body parts, respectively. In this study, resistance spot-welding method was used for joining steel pairs to be lap joint. A time and current controlled resistance spot welding machine having 120 kVA capacity, and pneumatic application mechanism were used in the experiments. Specimens prepared for spot welding operations were joined with different welding time ranging from 5 to 30 periods (1 period = 0.02 s) and different weld currents, ranging from 8.5 to 16.5 kA in 0.5 kA steps. The electrode force was kept constant at 6 kN. Tensile-peel tests were applied to the welded specimens. The effect of welding time parameter on tensile-peel properties was analyzed. The highest tensile-peel load was obtained using 15 periods.
Źródło:
Acta Physica Polonica A; 2017, 131, 3; 389-391
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Response of the Heat Affected Zone to Natural Aging in Friction Welded Al-Mg-Si-T6 Alloy
Autorzy:
Abudaia, F.
Marwan, K.
Powiązania:
https://bibliotekanauki.pl/articles/1207653.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
Opis:
In this work, it is aimed to study the effect of welding parameters on the response of the fully reverted zone of the heat affected zone in Al-Mg-Si-T6 alloy to natural aging. The study takes in consideration the effect of welding time which usually receives less attention than other parameters. Rods of 25 mm diameter were friction welded at varying welding times and forge pressures. The highest hardness recovery in the fully reverted zone was obtained by a combination of a high heat input with a short welding time. These welding conditions produced a thermal welding cycle with higher cooling rate with a relatively longer time at the peak temperature. The high cooling rate is important to avoid the formation of the non-hardening $Mg_2Si$ precipitates which do not contribute to the hardness. The longer hold time at peak temperature permits more precipitate dissolution to increase the solute concentration in the solution before the rapid cooling.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 208-210
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Taguchi Method to Investigate the Effect of Nucleus Diameter on Mechanical Properties of Automotive Sheets in Electrical Resistance Spot Welding
Autorzy:
Savaş, Ö.
Powiązania:
https://bibliotekanauki.pl/articles/1400569.pdf
Data publikacji:
2015-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
Opis:
In this study, the effects of nucleus diameter on tensile-peel strength in electrical resistance spot welding were investigated. Taguchi design approach has been employed to the experimental planning, the $L_{27}(3^{13})$ orthogonal array. The larger-the-better and the nominal-the-best response criteria were selected to obtain the optimum conditions for nucleus diameter and tensile-peel strength, respectively. In addition, the effects of five parameters, electrode pressure, clamping time, welding current, welding time, and holding time, were examined in this way. Results showed that the tensile-peel strength was related with nucleus diameter, and that welding current and welding time were the most effective parameters for improvement of the strength of weld joints.
Źródło:
Acta Physica Polonica A; 2015, 127, 4; 921-924
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Welding Current on Mechanical Properties of Welding Joints in SPA-C Steel Sheets in Resistance Spot Welding
Autorzy:
Akkas, N.
Ilhan, E.
Powiązania:
https://bibliotekanauki.pl/articles/1195238.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
Opis:
This paper presents an experimental study on resistance spot welding of SPA-C steel sheets used in side wall and roof in rail vehicles. SPA-C steel sheets having 2.3 mm thicknesses were joined by using resistance spot welding as lap joint. A timer and current controlled resistance spot welding machine having 120 kVA capacity and a pneumatic application mechanism with a single lever was used to prepare the specimens. Welding periods were chosen as 5, 10, 15, 20, 25, and 30 cycles and also welding currents were increased from 6 kA up to 14 kA by rise of 0.5 kA. The electrode force was kept constant at 6 kN. The prepared welding specimens were exposed to tensile-shear and tensile-peel tests and the obtained results were supported by diagrams and, finally, appropriate welding parameters were advised to the users.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 497-499
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soda Lime Silicate Glass-to-Titanium Joining by Controlled Heat Treatments in Air
Autorzy:
Telli, M.
Powiązania:
https://bibliotekanauki.pl/articles/1033483.pdf
Data publikacji:
2017-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
Opis:
Glass-to-metal joining is important for improving efficiencies of heat collecting units, employed in parabolic solar collecting systems. In this study, soda lime silicate glass was joined to titanium in air at 700, 800 and 900°C for 5 min by controlled heat treatments. Glass-to-titanium bonding was good and no delamination or macro cracking in glass was observed. During heat treatment, titanium is oxidized in air prior to the reaction with glass. The reaction between oxidized titanium and glass results in bubble formation at joining interface. Bubble formation was found to be decreased with decreasing joining temperature. Thermal stresses developed at glass-titanium junction were modeled by employing ANSYS 14 multiphysics simulation software. For the studied sample profile, soda lime silicate glass, close to the joining interface, experienced rather low residual stresses of the order of 10 MPa maximum and -40 MPa minimum principal stress levels. Good glass-to-titanium bonding and low thermal residual stress are mainly due to similar thermal expansion coefficients of these materials, which was found to be important for achieving successful joining in air.
Źródło:
Acta Physica Polonica A; 2017, 131, 3; 414-416
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Joining of Soda Lime Silicate Glass TO TI6AL4V Alloy in Air by Controlled Heat Treatments
Autorzy:
Telli, M.
Powiązania:
https://bibliotekanauki.pl/articles/1193565.pdf
Data publikacji:
2015-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
Opis:
Soda lime silicate glass was joined to Ti6Al4V alloy in air by heat treatment at 800°C for 10, 20 and 30 min and by subsequent cooling to room temperature with a controlled cooling rate. Stresses, due to thermal expansion mismatch, have developed at glass-metal interface after high temperature joining and cooling down to room temperature. The finite element calculations, performed using ANSYS 14 software, suggested that the glass-metal interface was experiencing rather low maximal and minimal principal stresses due to joining. Highest maximal principal stress level was about 25 MPa and lowest minimal principal stress level was about -40 MPa for used sandwich sample profiles. Heat treatment duration affected tensile bonding strength and interfacial reaction between the glass and the Ti alloy. Scanning electron microscope analysis of glass-alloy joining interface showed that a secondary K, Ca, Ti rich sodium silicate phase was forming in glass, starting at glass alloy interface and that it was growing with the increase in heat treatment duration. Low joining stress levels at the glass-alloy interface for used sandwich sample profile and good bonding between the soda lime silicate glass and Ti6Al4V alloy resulted in creation of successful soda lime silicate glass-Ti6Al4V joints.
Źródło:
Acta Physica Polonica A; 2015, 127, 4; 972-975
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Mechanical Properties of Metal Inert Gas-Brazed TRIP800 Steel Joints Using Different Shielding Gas Flow Rate
Autorzy:
Akkas, N.
Varol, F.
Ferik, E.
Ilhan, E.
Ozsarac, U.
Aslanlar, S.
Powiązania:
https://bibliotekanauki.pl/articles/1195263.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
Opis:
In this study, TRIP 800 (transformation induced plasticity) steel plates having 1.5 mm thickness were joined by copper-based (CuAl8) wire in gas metal arc brazing technique. Specimens were prepared in joining forms as butt joint. Brazing operations were done with five different shielding gas flow rates of 8, 10, 12, 14, and 16 L/min. CuAl8 wire composed mostly of copper serves as the filler metal. Having accomplished the brazing operations, tensile properties of joints were detected, and micro- and macrostructures of joints were investigated in order to see the joinability of TRIP 800 steel by gas metal arc brazing technique.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 473-474
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Welding Current on Mechanical Properties of Welding Joints in S235JR(Cu) Steel Sheets in Resistance Spot Welding
Autorzy:
Akkas, N.
Varol, F.
Ferik, E.
Ilhan, E.
Ozsarac, U.
Aslanlar, S.
Powiązania:
https://bibliotekanauki.pl/articles/1195245.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
Opis:
This paper presents an experimental study on resistance spot welding of S235JR(Cu) steel sheets used in side wall and roof in rail vehicles. S235JR(Cu) steel sheets having 2.0 mm thicknesses were joined by using resistance spot welding as lap joint. A timer and current controlled resistance spot welding machine having 120 kVA capacity and a pneumatic application mechanism with a single lever was used to prepare the specimens. Welding periods were chosen as 10, 15, 20, 25 and 30 cycles and also welding currents were increased from 6 kA up to 14 kA by rise of 1 kA. The electrode force was kept constant at 6 kN. The prepared welding specimens were exposed to tensile-shear and tensile-peel tests and the obtained results were supported by diagrams and, finally, appropriate welding parameters were advised to the users.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 500-502
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soda Lime Silicate Glass-Copper Metal Joining by Controlled Heat Treatments in Air
Autorzy:
Telli, M.
Powiązania:
https://bibliotekanauki.pl/articles/1186748.pdf
Data publikacji:
2016-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
Opis:
Metal-glass joints are needed to improve efficiencies of heat collecting units used in linear parabolic sun collector systems. Soda lime silicate glass-copper metal joints were prepared at 800°C for 5, 10 and 20 min by furnace treatment in air. Cu is rapidly oxidized with heat treatment in air, reacted with glass and formed some bubbles at reaction interface. Scanning electron microscope investigation suggested copper oxide formation at copper interface, reaction between copper oxide and glass and formation of bubbles at joining interface and some microcracking for the studied glass disk on Cu disk sample profiles. ANSYS14 software simulations suggested joined glass experienced complicated and high residual stress levels due to big thermal expansion coefficient difference and bubble formation at the joining interface. The residual minimal principal stress levels were at the order of -400 MPa for joined glass at interface produced microcracking in glass starting from joined interface growing into glass layer.
Źródło:
Acta Physica Polonica A; 2016, 129, 4; 482-484
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Welding Time Effect on Mechanical Properties in Resistance Spot Welding of S235JR(Cu) Steel Sheets Used in Railway Vehicles
Autorzy:
Akkaş, N.
İlhan, E.
Varol, F.
Aslanlar, S.
Powiązania:
https://bibliotekanauki.pl/articles/1187223.pdf
Data publikacji:
2016-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
Opis:
In this paper, S235JR(Cu) steel sheets were welded by electrical resistance spot welding method. Their thickness was 2 mm and joints were prepared in overlap joint form. A timer and current controlled resistance spot welding machine having 120 kVA capacity and a pneumatic application mechanism with a single lever was used to prepare the specimens. Welding periods were chosen as 5, 10, 15, 20, 25, and 30 periods and also welding currents were increased from 6 kA up to 14 kA by rise of 0.5 kA. The electrode force was kept constant at 6 kN. The obtained welding joints were exposed to tensile-peel and tensile-shear tests. As a result of these experiments, the maximum tensile-shear and tensile-peel strength are obtained in 30 period welding time for 8.5 kA welding current.
Źródło:
Acta Physica Polonica A; 2016, 129, 4; 541-543
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study on Hardfacing Alloy Using Fe-Cr and Fe-B Powders
Autorzy:
Karip, E.
Aydin, S.
Muratoğlu, M.
Powiązania:
https://bibliotekanauki.pl/articles/1401952.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
Opis:
The aim of this study is the investigation of the effect of ferroboron and ferrochromium with massive wire based hardfacing alloys. Mixture of Fe-Cr and Fe-B powders was added to massive wire during welding process. Hardface layers were obtained by three different powder mixture and three different powder/massive wire proportions. Hardfacing was applied to two AISI 1020 steel substrates by open arc welding. Hardness test, scanning electron microscope and X-ray diffraction analysis were made to the samples. Test results showed that increasing ferroboron content and increasing powder mixture amount enhanced the microhardness of the specimens.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-160-B-163
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Mechanical Properties of Butt Joints of DP800 Thin Zinc-Coated Steel Plates, CMT-Brazed Using Different Current Intensities
Autorzy:
Acar, İ.
Sıksık, V.
Varol, F.
Aslanlar, S.
Powiązania:
https://bibliotekanauki.pl/articles/1031233.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Bx
81.20.Vj
Opis:
In this study, DP800 (dual phase) steel plates, having 1 mm thickness were joined by copper-based (CuAl8) wire using CMT-brazing (cold metal transfer) technique. Specimens were prepared in joining forms in butt joint configuration. CMT-brazing operations were done under nine different CMT-brazing current intensities of 40, 45, 50, 55, 60, 65, 70, 75 and 80 A. CuAl8 wire, composed largely of copper, was used as the filler metal. Having accomplished the CMT-brazing operations, the tensile properties of joints, and micro- and macro-structures of joints were investigated in order to test the joinability of DP800 steel by CMT-brazing technique.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 849-851
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural studies of welds in wear-resistant steels
Autorzy:
Bramowicz, M.
Kulesza, S.
Lewalski, P.
Szatkowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1112878.pdf
Data publikacji:
2016-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
81.05.Bx
Opis:
The work presents results of the research on changes in microstructural, and mechanical properties of the structural XAR 400 wear-resistant steel caused by the welding procedure. Metallographic and microhardness studies revealed complex microstructure of the welds that turned out to vary with the distance from the weld axis: predominance of the acicular ferrite (ACF) structures in the weld itself, quasi-polygonal ferrite (QPF) crystals with precipitates of troostite (T) in the heat-affected zone, and the bainitic ferrite (BF) structures in the heat-partially-affected zone.
Źródło:
Acta Physica Polonica A; 2016, 130, 4; 963-965
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Tensile Properties of Aluminum 6082-T6 Alloys Joined by Cold Metal Transfer Method by Using Different Working Time
Autorzy:
Ozsarac, U.
Işik, Ş.
Varol, F.
Emin Unat, M.
Özdemir, C.
Aslanlar, S.
Powiązania:
https://bibliotekanauki.pl/articles/1031098.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.VJ
81.70.BT
Opis:
In this study, Aluminium 6082-T6 plates having 1.0 mm thickness were joined by magnesium-based (AlMg5) wire in cold metal transfer technique. The specimens were prepared in butt joint form. Argon was used as shielding gas and joining operations were done at gas flow speed of 13 l/min. The joining operations were carried out during four different working times of 25, 30, 35, 40 and 45 seconds. Tensile properties of joints were determined and macro-structures of joints were investigated in order to evaluate the joinability of Aluminium 6082-T6 alloy by cold metal transfer technique. Finally, the micro-hardness values of specimens were measured.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 705-707
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł

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