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Wyszukujesz frazę "wall thickness" wg kryterium: Temat


Tytuł:
An experimental study on wall thickness distribution in thermoforming
Autorzy:
Karabeyoglu, S. S.
Ekşi, O.
Erdoğan, S.
Powiązania:
https://bibliotekanauki.pl/articles/103237.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
geometric element analysis (GEA)
wall thickness distribution
polystyrene
thermoforming
Opis:
In this work, Polystyrene (PS) sheets were thermoformed in predetermined conditions. Wall thickness distributions obtained by experimental method in PS thermoformed products. Then the same thickness distributions were predicted by using Geometric Element Analysis (GEA). The thickness results were obtained experimentally, compared to thickness distributions which were predicted by GEA. It has been found that GEA does not precisely reveal thickness distributions.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 3; 139-142
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of two conditions of loss of stability in analysis of the tube bending process
Autorzy:
Śloderbach, Z.
Powiązania:
https://bibliotekanauki.pl/articles/265422.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
dopuszczalne naprężenia
kąt zginania
warstwa neutralna
kolanko
allowable strains and stresses
bending angles
neutral layer
wall thickness of elbows
Opis:
In this paper, the derivation of expressions for admissible values of strains and stresses for vertex points of layers subjected to tension during tube bending at bending machines is presented. The conditions of the dispersed and located loss of stability of the bent tube were assumed as criteria of instability. The original element of this paper is the extension of the criterion of strain location in a form of possible initiation of a neck or furrow (introduced by Marciniak for thin plates [1]) to bending thin- and thick-walled metal tubes at bending machines. The conditions of the dispersed and localized loss of stability together with formation of the plane state of deformation (PSD) in the plane stress state (PSS) were assumed as the criteria of instability. The calculation results were presented as graphs being useful nomograms. We present also simple examples of calculations of permissible and critical strains and values of bending angles including and not including displacement of the neutral axis y0, during cold bending metal thin-walled tubes at bending machines for bending angles […].
Źródło:
International Journal of Applied Mechanics and Engineering; 2019, 24, 4; 200-223
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Derivation of relations and analysis of tube bending processes using discontinuous fields of plastic strains. Part I. Derivation of geometric-analytic relationships
Autorzy:
Śloderbach, Z.
Powiązania:
https://bibliotekanauki.pl/articles/264482.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
bending tubes
three simplifications
strains
wall thickness
discontinuous strain fields
naprężenia
kinematyka
gięcie rur
Opis:
The generalized strain scheme in bending metal tubes at bending machines with the use of a mandrel presented in Śloderbach (1999; 2002; 20131,2; 2014) satisfies initial and boundary kinematic conditions of bending, conditions of continuity and inseparability of strains. This paper introduces three formal simplifications gradually imposed into forms of principal components of the generalized strain model giving suitable simplifications of the 1st, 2nd and 3rd types. Such mathematical simplifications cause that the obtained strain fields do not satisfy the condition of consistency of displacements and strain continuity. The simplified methods determine safer values of the wall thickness than those from the generalized continuous strain scheme. The condition of plastic incompressibility was used for the derivation of an expression for distribution of Wall thickness of the bent elbow in the layers subjected to tension and compression for three examples of discontinuous kinematic strain fields.
Źródło:
International Journal of Applied Mechanics and Engineering; 2015, 20, 2; 417-426
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Derivation of relations and analysis of tube bending processes using discontinuous fields of plastic strains. Part II. Discussion and analysis of the obtained results
Autorzy:
Śloderbach, Z.
Powiązania:
https://bibliotekanauki.pl/articles/955329.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
three simplifications
strains
wall thickness
allovable strains and ovalization
odkształcenia plastyczne
gięcie rur
naprężenia
Opis:
This paper presents the calculation results obtained on the basis of three formal simplifications (derived in Part I) gradually led into the main components of the generalized model of strain where suitable simplifications of the 1st, 2nd and 3rd type have been obtained. The paper also presents the results of considerations on the wall thickness distribution in the vertex point of the elongated layers of the bent elbow, and values of main components of the strain state and intensity of the strain (equivalent strain) depending on the bending angle for the generalized strain scheme and three simplified methods. The results are shown in the form of graphs and table.
Źródło:
International Journal of Applied Mechanics and Engineering; 2015, 20, 2; 427-435
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electromagnetic sensor for the control of pipe wall thickness
Elektromagnetyczny czujnik do kontroli grubości ścianek rur
Autorzy:
Avramenko, A.
Garmash, A.
Gorkunov, B.
Lvov, S.
Tyshchenko, A.
Powiązania:
https://bibliotekanauki.pl/articles/209202.pdf
Data publikacji:
2015
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
electromagnetic converter
sensor
magnetic flux
wall thickness
tubular product
przetwornik elektromagnetyczny
czujnik
strumień magnetyczny
grubość ścianki
produkty rurowe
Opis:
Calculation of the primary inductive converter with magnetic core is problematic because of the difficulty in determining the various fluxes inside and outside the magnetic core. Observance of certain requirements for structural and scheme-related decisions makes is possible to substantially simplify theoretical expressions for description of work in such type of converters. The paper presents problems in the theory, design, and schematic layout of universal surface sensor with magnetic core, used for controlling wall thickness in tubular conductive products. The proposed construction of the sensor will allow using it to control wall thickness in a wide assortment of pipes.
Obliczenie podstawowego przetwornika indukcyjnego z rdzeniem magnetycznym jest problematyczne z powodu trudności w określeniu wewnętrznych i zewnętrznych strumieni rdzenia magnetycznego. Stosowanie pewnych wymagań dotyczących struktury i schematu przetwornika umożliwia zasadnicze uproszczenie teoretycznych wyrażeń opisujących pracę tego typu przetworników. Artykuł przedstawia problemy teorii i projektowania oraz schematyczny układ uniwersalnego czujnika powierzchni z rdzeniem magnetycznym stosowanego do kontroli grubości ścian elektro-przewodzących wyrobów rurowych. Proponowana konstrukcja czujnika pozwoli na zastosowanie go do szerokiego asortymentu rur.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2015, 64, 2; 35-43
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and numerical investigation of friction coefficient effects on defects in horizontal tube bending process
Autorzy:
Taheri Kahnamouei, J.
Fattahi, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/279854.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
tube bending
wrinkle
simulation
friction
wall thickness change
Opis:
The aim of this paper is to investigate defects in a thin-walled tube bending process (without using mandrel and booster) and effects of friction between the dies and tube on wrinkles. In the tube bending process, there are several effective parameters such as wall thickness, outer diameter-to-wall thickness ratio, centerline bending radius-to-outer diameter ratio and friction coefficient. Any mismatch in the selection of the process parameters would cause defects inducing undesirable variations in wall thickness and cross-section distortion. In this work, firstly, tubes with several wall thickness values are bent, and the final depths of wrinkling and wall thickness change are reviewed. Then, to study the process numerically, numerical simulations are carried out. Then, a series of experimental tests are carried out to verify the simulation results. A comparison between numerical and experimental results shows a reasonable agreement. Finally, in order to obtain a suitable friction condition, the effects of friction coefficients on defects are studied. For this purpose, a series of simulations has been carried out. It shows that at a certain friction coefficient, a minimum wrinkling depth can be observed and variations in the friction coefficient between the dies and tube has no effective influence on wall thinning and thickening.
Źródło:
Journal of Theoretical and Applied Mechanics; 2015, 53, 4; 837-846
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Generalized model of strains during bending of metal tubes in bending machines
Autorzy:
Śloderbach, Z.
Powiązania:
https://bibliotekanauki.pl/articles/279709.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
tubes bending
deformations
bending angle
thickness of the wall
neutral axis
Opis:
According to the postulate concerning a local change of the “actual active radius” with a bending angle in the bent zone, a generalized model of strain during bending of ametal tube has been derived. The considered tubes should be subjected to bending in tube bending machines by the method of wrapping on a rotating template and with the use of a lubricated steel mandrel. The model is represented by three components of strain in the analytical form, including displacement of the neutral axis. Generalization of the model of metal tubes in the existing papers consists in including the displacement of the neutral axis and the possibility of determination of strains at each point along the thickness of the wall of the bent tube in the bending zone. The derived scheme of strain satisfies initial and boundary kinematic conditions of the bending process, conditions of continuity and inseparability of strains. The obtained analytical expressions can be classified as acceptable from the kinematic point of view.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 4; 1093-1106
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact assessment of the uniformity mixing recycled and virgin polymers on the technical extrusion blow molding efficiency
Autorzy:
Pepliński, K.
Powiązania:
https://bibliotekanauki.pl/articles/2073653.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
technical extrusion blow molding
plastics mixing recyclate
virgin plastics
mixing uniformity
part weight
wall thickness
Opis:
Extrusion blow molding of technical products (EBM-TP) is a significant technological polymer manufacturing process ex. for the automotive branch. Implementation of the extrusion blow molding process in an operating arrangement of polymer technology is a component of many technological factors, but also of factors related to feedstock material. The products can be manufacturing with the participation of plastics recyclate. The homogeneity of the recyclate-virgin polymer mixture strongly influences the distribution of spreading the wall thickness of the final products. For this type product wall thickness distribution should be uniform and very close to each other or determined in a specific range of values. Work presents the mixture influence (HDPE recyclate-virgin polymer,) with different characteristics of mixing degree defined as homogeneous and heterogeneous, on the part features (the intake manifold airflow in a motor vehicle) with respect to the weight of the weight and wall thickness in reference required by the customer of the product. Mixtures of HDPE were prepared via a specialized gravimetric mixer, which is directly connected to the feed circuit extruder blow molding. They began to manufacture defined types of test specimen (actual Products of) and their evaluation according to criteria adopted burden of weight and wall thickness.
Źródło:
Journal of Polish CIMEEAC; 2015, 10, 1; 127--132
1231-3998
Pojawia się w:
Journal of Polish CIMEEAC
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Casting Wall Thickness on Crystallisation Under Pressure
Autorzy:
Pastirčák, R.
Ščury, J.
Brůna, M.
Bolibruchová, D.
Jakubski, J.
Powiązania:
https://bibliotekanauki.pl/articles/353947.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
squeeze casting
AlSi7Mg0.3 alloy
AlSi12 alloy
pressure
wall thickness
Opis:
The paper deals with squeeze casting technology. For this research a direct squeeze casting method has been chosen. The influence of process parameters variation (casting temperature, mold temperature, pressure) on mechanical properties and structure will be observed. The thicknesses of the individual walls were selected based on the use of preferred numbers and series of preferred numbers (STN ISO 17) with the sequence of 3.15, 4.00, 5.00, 6.00 and 8.00 mm. The width of each wall was 22 mm with a length of 100 mm. As an experimental material was chosen the AlSi12 and AlSi7Mg0.3 alloys. The mechanical properties (UTS, E) for individual casting parameters and their individual areas of different thicknesses were evaluated. In the structure the influence of pressure on the change of the eutectic morphology, the change of the volume of eutectic and the primary alpha phase, the effect of the pressure on the more fine-grain and the regularization of the structure were evaluated.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1889-1893
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulation of the stress state of an erosion-worn tee of the main gas pipeline
Autorzy:
Doroshenko, Ya.
Zapukhliak, V.
Grudz, Ya.
Poberezhny, L.
Hrytsanchuk, A.
Popovych, P.
Shevchuk, O.
Powiązania:
https://bibliotekanauki.pl/articles/1818501.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
multiphase flow
gas-dynamic process
erosion wear
residual life
temperature difference
erosion defect
allowable wall thickness
przepływ wielofazowy
proces gazodynamiczny
zużycie erozyjne
trwałość resztkowa
różnica temperatur
wada erozji
Opis:
Purpose: To investigate the strength of tees with regard to their erosion wear, it is necessary to consider the complex three-dimensional geometric shape of the erosion worn inner surface of the tee. In addition, the study of the strength of the erosion worn tees of the main gas pipelines is complicated by the occurrence of additional stresses caused by changes in the direction of movement of the gas stream, resulting in an uneven pressure distribution in the inner cavity of the tee, and the temperature difference in its walls. Design/methodology/approach: Methodology for complex numerical three-dimensional simulation of the stressed state of tees of the main gas pipelines, taking into account the gas-dynamic processes that occur in the places of these defects, erosion wear of the tee wall, temperature difference in the tee walls. Findings: The acceptable parameters of erosion defects of tees of gas pipelines, and residual life of tees with erosion defects of the wall should be determined. Research limitations/implications: The developed model does not take into account internal corrosion and corrosion products as an additional erosion factor. Further studies plan to develop a model of corrosion-erosion wear of pipeline elements. Practical implications: The developed technique allows determining the location of erosion defects, estimating the strength and determining the residual life of tees with erosion wear of the wall in order to ensure their reliability, to rank such defects according to the degree of danger, to determine which of them are critical and need an immediate repair. Originality/value: Based on the gas-dynamic processes occurring in the internal cavity of the main gas pipelines’ tees, the complex three-dimensional geometric form of wall erosion defects, and temperature difference, the technique of three-dimensional simulation of stress state of the main gas pipelines’ tees is developed
Źródło:
Archives of Materials Science and Engineering; 2020, 101, 2; 63--78
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O przyczynach powstania rys w zbiorniku cylindrycznym, którego ściany mają skokowo zmienną grubość
On the causes of cracking in a cylindrical tank with walls of discretely variable thickness
Autorzy:
Buczkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/160635.pdf
Data publikacji:
2012
Wydawca:
Polski Związek Inżynierów i Techników Budownictwa
Tematy:
zbiornik żelbetowy
zbiornik cylindryczny
ściana o skokowo zmiennej grubości
zarysowanie
temperatura
analiza naprężeń
reinforced concrete tank
cylindrical tank
discrete variable wall thickness
cracking
temperature
stress analysis
Opis:
W pracy przedstawiono przypadek zarysowania ścian zbiornika cylindrycznego, którego przyczyną było działanie temperatury na ściany o skokowo zmiennej grubości. Wniosek wypływający z pracy wskazuje, że przy zbiornikach w skokowo zmiennej grubości ścian należy do czasu ich ocieplenia chronić je przed nadmiernym działaniem temperatury.
This paper presents a case of cracking in the walls of a cylindrical tank caused by the action of temperature on its walls, which are of discretely variable thickness. The conclusion is reached that, in tanks with walls of this type, they should be protected against excessive temperature effects until thermal insulation is applied.
Źródło:
Przegląd Budowlany; 2012, R. 83, nr 4, 4; 161-164
0033-2038
Pojawia się w:
Przegląd Budowlany
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena wpływu charakterystyki geometrycznej dyszy głowicy wytłaczarskiej i zawartości recyklatu na jakość rozdmuchiwanych wytworów technicznych
Assess of the extrusion die gap geometric characteristics and recyclate content impact on the technical blowing product quality
Autorzy:
Pepliński, K.
Powiązania:
https://bibliotekanauki.pl/articles/278421.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników
Tematy:
wytłaczanie z rozdmuchiwaniem
dysza głowicy
grubość ścianki
masa wytworu
wskaźniki oceny procesu
extrusion blow molding
die gap
wall thickness
blowing product mass
assessment process indicators
Opis:
Wytłaczanie z rozdmuchiwaniem w formie jest procesem technologicznym przetwórstwa tworzyw polimerowych o rosnącej popularności rynkowej wynikającej z wzrostu zapotrzebowania na opakowania wytwarzane tą techniką dla kosmetyków jak i również wytworów stricte technicznych wykorzystywanych m.in. w motoryzacji. Realizacja procesu wytłaczania z rozdmuchiwaniem w układzie roboczym maszyny jest składową wielu czynników między innymi przetwórczych, narzędziowych i materiałowych, które wpływają na jakość wytworu wewnątrz pustego. W pracy przedstawiono ocenę wpływu wymiarów geometrycznych dyszy głowicy wytłaczarskiej akumulacyjnej oraz zmiennej zawartości recyklatu PE-HD we wsadzie pierwotnym, na jakość wykonywanego wytworu rozdmuchiwanego w odniesieniu do masy oraz grubości ścinaki wytworu w przyjętych punktach. Dokonano także oceny wybranych wskaźników jakości i wydajności zrealizowanego procesu.
Extrusion blow molding is a technological process for the processing of polymeric materials with increasing market popularity resulting from increased demand for packaging made with this technique for cosmetics and technical product used in the car industry. Implementation of the extrusion blow molding process in the work polymer processing system is determined by many factors: processing, tooling and materials, which influence on the final hollow product quality. In research work describe assessments of the extrusion die gap geometrical characteristics and different PE-HD recyclat content impact on the technical blowing product quality, in relation to mass and wall thickness. Moreover, evaluation was performed for chosen quality and efficiency indicators in the realizing process.
Źródło:
Przetwórstwo Tworzyw; 2017, T. 23, Nr 5 (179), 5 (179); 417-426
1429-0472
Pojawia się w:
Przetwórstwo Tworzyw
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimisation of the deoxidation degree and modification on the cast steel properties improvement at low temperature
Optymalizacja stopnia odtleniania i modyfikacji na poprawę własności w niskich temperaturach
Autorzy:
Sierant, Z.
Powiązania:
https://bibliotekanauki.pl/articles/351224.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
steel castings
minus temperatures
wall thickness
odlewy stalowe
niskie temperatury
grubość ścianki
Opis:
Industrial conditions of obtaining thick-walled and shaped castings intended for operations at temperatures: minus 40÷60°C are presented in the paper. The selection of a cast steel grade is based on known studies [1,10,14], however due to castings wall thickness (70-240mm), the way of preparing liquid metal (deep deoxidation and modification, argon stirring in a ladle) and conditions of filling mould cavities (gating system assuring quiet filling, directional solidification and avoiding a formation of inessential heat centres), were developed to assure the required impact strength. Maintaining these parameters as well as the selection of heat treatments for the produced massive castings allowed to achieve the impact strength over 50 J/cm2 at minus 40°. This value was obtained for walls of various thickness.
Przedstawiono przemysłowe warunki otrzymywania grubościennych i kształtowych odlewów, przeznaczonych do pracy w temperaturze minus 40÷60°. Dobór gatunku staliwa oparto o znane prace [1,10,14], jednak ze względu na grubość ścianek odlewów (70-240 mm), opracowano sposób przygotowania ciekłego metalu (głębokie odtlenianie i modyfikacja, argonowanie w kadzi) oraz warunki zapełnienia wnęki formy (układ wlewowy zapewniający spokojne wypełnianie, kierunkowe krzepnięcie i unikanie tworzenia zbędnych węzłów cieplnych), dla zapewnienia wymaganej udarności. Zachowanie tych parametrów jak również dobór obróbki cieplnej dla produkowanych masywnych odlewów, pozwoliły na uzyskanie udarności w minus 40° wynoszącej powyżej 50 J/cm2. Wartość tą otrzymano dla ścianek o różnej grubości.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 3; 763-767
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quality of automotive sand casting with different wall thickness from progressive secondary alloy
Autorzy:
Pastierovičová, Lucia
Kuchariková, Lenka
Tillová, Eva
Chalupová, Mária
Pastirčák, Richard
Powiązania:
https://bibliotekanauki.pl/articles/26078793.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
jakość odlewów
wtórny stop aluminium
grubość ściany
analiza ilościowa
wyższa zawartość Fe
quality of castings
secondary aluminium alloy
wall thickness
quantitative analysis
higher Fe content
Opis:
This paperwork is focused on the quality of AlSi6Cu4 casting with different wall thicknesses cast into the metal mold. Investigated are structural changes (the morphology, size, and distribution of structural components). The quantitative analysis is used to numerically evaluate the size and area fraction of structural parameters (α-phase, eutectic Si, intermetallic phases) between delivered experimental material and cast with different wall thicknesses. Additionally, the Brinell hardness is performed to obtain the mechanical property benefits of the thin-walled alloys. This research leads to the conclusion, that the AlSi6Cu4 alloy from metal mold has finer structural components, especially in small wall thicknesses, and thus has better mechanical properties (Brinell hardness). These secondary Al-castings have a high potential for use in the automotive industry, due to the thin thicknesses and thus lightweight of the construction.
Źródło:
Production Engineering Archives; 2022, 28, 2; 172--177
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Different Wall Thicknesses of the Casting in the Direct Squeeze Casting
Autorzy:
Pastirčák, R.
Brůna, M.
Bolibruchová, D.
Powiązania:
https://bibliotekanauki.pl/articles/381032.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
squeeze casting
wall thickness
mechanical properties
structure
aluminium alloy
odlew
grubość ścianki
właściwości mechaniczne
struktura
stop aluminium
Opis:
The paper deals with squeeze casting technology. For this research a direct squeeze casting method has been chosen. As an experimental material, the AlSi12 and AlSi7Mg0.3 alloys were used. The influence of process parameters variation (pouring temperature, mold temperature) on mechanical properties and structure will be observed. For the AlSi7Mg0.3 alloy, a pressure of 30 MPa was used and for the AlSi12 alloy 50 MPa. The thicknesses of the individual walls were selected based on the use of preferred numbers and series of preferred numbers (STN ISO 17) with the sequence of 3.15 mm, 4 mm, 5 mm, 6.3 mm and 8 mm. The width of each wall was 22 mm and length 100 mm. The mechanical properties (Rm, A5) for individual casting parameters and their individual areas of different thicknesses were evaluated. For the AlSi7Mg0.3 alloy, the percentage increase of the tensile strength was up to 37% and the elongation by 400% (at the 8 mm thickness of the casting). For the AlSi12 alloy, the strength increased from 8 to 20% and the tensile strength increased from 5 to 85%. The minimum thickness of the wall to influence the casting properties by pressure was set to 5 mm (based on the used casting parameters). Due to the effect of the pressure during crystallization, a considerable refinement and uniformity of the casting structure occured, also a reduction in the size of the eutectic silicate-eliminated needles was observed.
Źródło:
Archives of Foundry Engineering; 2019, 1; 19-24
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł

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