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Tytuł:
T6 Heat Treatment of Hypo-eutectic Silumins in Aspect of Improvement of Rm Tensile Strength
Autorzy:
Pezda, J.
Powiązania:
https://bibliotekanauki.pl/articles/379746.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat treatment
modification
ATD
tensile strength
obróbka cieplna
modyfikacja
wytrzymałość na rozciąganie
Opis:
Improvement of properties of silumins in scope of classic methods is connected with changes in morphology of silicon precipitation through: process of modification of alloy, maintaining a suitable temperature of overheating and pouring into moulds, as well as perfection of heat treatment processes. Obtained structure of casting have a direct influence on mechanical and technological properties of machinery parts, and therefore, usage of knowledge on crystallization to control of crystallization’s kinetics of castings in order to optimize obtained structure and introduction of modern methods of heat treatment, enabling considerable improvement of mechanical and technological properties, becomes an important factor. Dispersion hardening with soaking of alloy near temperature of solidus, consisting in heating of poured specimens to temperature of solutioning, keeping in such temperature, cooling down in cold water (20oC), and next operation of artificial ageing have effect on change of tensile strength Rm of a selected hypo-eutectoid silumins. Selection of suitable parameters of dispersion hardening is condition of obtainment of positive results in terms of improvement of tensile strength Rm and has effect on its economic aspects.
Źródło:
Archives of Foundry Engineering; 2012, 12, 2s; 49-52
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact Strength of Composite Materials Based on EN AC-44200 Matrix Reinforced with Al2O3 Particles
Autorzy:
Kurzawa, A.
Kaczmar, J. W.
Powiązania:
https://bibliotekanauki.pl/articles/382466.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
composites
squeeze casting
aluminum
tensile strength
impact strength
kompozyty
odlewy
aluminium
wytrzymałość na rozciąganie
Opis:
The paper presents the results of research of impact strength of aluminum alloy EN AC-44200 based composite materials reinforced with alumina particles. The research was carried out applying the materials produced by the pressure infiltration method of ceramic preforms made of Al2O3 particles of 3-6mum with the liquid EN AC-44200 Al alloy. The research was aimed at determining the composite resistance to dynamic loads, taking into account the volume of reinforcing particles (from 10 to 40% by volume) at an ambient of 23°C and at elevated temperatures to a maximum of 300°C. The results of this study were referred to the unreinforced matrix EN AC-44200 and to its hardness and tensile strength. Based on microscopic studies, an analysis and description of crack mechanics of the tested materials were performed. Structural analysis of a fracture surface, material structures under the crack surfaces of the matrix and cracking of the reinforcing particles were performed.
Źródło:
Archives of Foundry Engineering; 2017, 17, 3; 73-78
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical Property Comparison of Al11Si Wheels Grain Refined by Ti, Nb and MTS
Autorzy:
Aydogan, F.
Dizdar, Kerem Can
Sahin, Hayati
Mentese, E.
Dispinar, Derya
Powiązania:
https://bibliotekanauki.pl/articles/2203929.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wheels
grain refinement
mechanical property
tensile strength
koła
rafinacja
właściwości mechaniczne
wytrzymałość na rozciąganie
Opis:
In this work, 25 wheels were cast with three different grain refiners: Al5Ti1B, Al3Nb1B and MTS 1582. Samples were machined from the wheels to check the mechanical properties. It was found that Nb grain refinement had the lowest grain size (260 mm) and highest tensile properties (yield strength of 119-124 MPa and ultimate tensile strength of 190-209 MPa). Al5Ti1B and MTS 1582 revealed quite similar results (110 MPa yield and 198 MPa ultimate tensile strength). The fading of the grain refining effect of Al5TiB1 master alloy was observed in both Nb and Ti added castings whereas during the investigated time interval, the fading was not observed when MTS 1582 was used.
Źródło:
Archives of Foundry Engineering; 2022, 22, 4; 14--18
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the Energy of Destruction of Bindings of a Core and Moulding Sand Based on Quartz Sand Grains
Autorzy:
Dańko, R.
Dajczer, G.
Powiązania:
https://bibliotekanauki.pl/articles/383164.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
moulding sand
deformation energy
impact resistance
tensile strength
masa formierska
odkształcenia
odporność na uderzenia
wytrzymałość na rozciąganie
Opis:
In the knock-out process, as well as in the preliminary phase of moulding sand reclamation, the issue of energy demand for the process of crushing used sand agglutinations, preferably to single grains, is particularly important. At present, numerical values of moulding sand impact resistance, which would allow energy-related aspects of this process to be forecast, are not known, as such research has not been carried out. It seems that impact resistance tested on very small cross-section samples, which allows us to very precisely reveal some unique features of a moulding sand with organic and inorganic binders, is an important parameter, which so far has not been taken into account for evaluation of mechanical properties of moulding sands. Preliminary attempts to determine impact resistance of moulding sands have been carried out as part of own research of the author. The conducted investigations aimed at determining the relationships between the obtained values of tensile strength and impact resistance of moulding sands. In addition, the effect of holding samples at temperatures of 100oC, 200oC, 300oC on the value of impact resistance was determined, both for sands made with fresh and with reclaimed sand grains.
Źródło:
Archives of Foundry Engineering; 2018, 18, 1; 19-22
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Shortened Heat Treatment on Change of the Rm Tensile Strength of the 320.0 Aluminum Alloy
Autorzy:
Pezda, J.
Powiązania:
https://bibliotekanauki.pl/articles/381551.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
ATD
heat treatment
tensile strength
stop aluminium
metoda ATD
obróbka cieplna
wytrzymałość na rozciąganie
Opis:
Mechanical and technological properties of castings made from 3xx.x alloys depend mainly on properly performed process of melting and casting, structure of a casting and mould, as well as possible heat treatment. Precipitation processes occurring during the heat treatment of the silumins containing additives of Cu and/or Mg have effect on improvement of mechanical properties of the material, while choice of parameters of solutioning and ageing treatments belongs to objectives of research work performed by a number of authors. Shortened heat treatment, which is presented in the paper assures suitable mechanical properties (Rm), and simultaneously doesn’t cause any increase of production costs of a given component due to long lasting operations of the solutioning and ageing. Results of the research concern effects of the solutioning and ageing parameters on the Rm tensile strength presented in form of the second degree polynomial and illustrated in spatial diagrams. Performed shortened heat treatment results in considerable increase of the Rm tensile strength of the 320.0 alloy as early as after 1 hour of the solutioning and 2 hours of the ageing performed in suitable.
Źródło:
Archives of Foundry Engineering; 2015, 15, 1; 75-78
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of the Different Moulding Parameters on Properties of the Green Sand Mould
Autorzy:
Abdulamer, Dheya
Powiązania:
https://bibliotekanauki.pl/articles/27314147.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
green sand
compactability
tensile strength
permeability
Taguchi method
masa formierska
zagęszczalność
wytrzymałość na rozciąganie
przepuszczalność
Metoda Taguchiego
Opis:
Sand Casting process depends mainly on properties of the green sand mould, sand casting requires producing green sand mould without failure and breakage during separation the mould from the model, transportation and handling. Production of the green sand mould corresponding to dimensions and form of the desired model without troubles depends on the properties of the green sand. Ratio of constituents, preparation method of the green sand, mixing and pressing processes determine properties of green sand. In the present work, study effect of the moulding parameters of bentonite content, mixing time, and compactability percentage on the properties of the green sand mould have been investigated. Design of experiments through Taguchi method was used to evaluate properties of permeability, compressive strength, and tensile strength of the green sand. It was found that 47% of compactability, 9(min) of mixing time, and 6% of bentonite content gives highest values of these properties simultaneously.
Źródło:
Archives of Foundry Engineering; 2023, 23, 2; 5--9
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Highsilicone Austempered Ductile Iron
Autorzy:
Kochański, A.
Krzyńska, A.
Radziszewski, T.
Powiązania:
https://bibliotekanauki.pl/articles/382613.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
austempered ductile iron
silicone content
matrix structure
ultimate tensile strength
żeliwo sferoidalne
właściwości mechaniczne
wytrzymałość na rozciąganie
Opis:
Ductile iron casts with a higher silicone content were produced. The austempering process of high silicone ductile iron involving different austempering times was studied and the results presented. The results of metallographical observations and tensile strength tests were offered. The obtained results point to the fact that the silicone content which is considered as acceptable in the literature may in fact be exceeded. The issue is viewed as requiring further research.
Źródło:
Archives of Foundry Engineering; 2014, 14, 1; 55-58
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heat Treatment of a Casting Element of a Through Clamp to Suspension of Electric Cables on Line Post Insulators
Autorzy:
Pezda, J.
Powiązania:
https://bibliotekanauki.pl/articles/379668.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat treatment
aluminum alloys
ATD
tensile strength
hardness HB
obróbka cieplna
stopy aluminium
wytrzymałość na rozciąganie
twardość
Opis:
Heat treatment of a casting elements poured from silumins belongs to technological processes aimed mainly at change of their mechanical properties in solid state, inducing predetermined structural changes, which are based on precipitation processes (structural strengthening of the material), being a derivative of temperature and duration of solutioning and ageing operations. The subject-matter of this paper is the issue concerning implementation of a heat treatment process, basing on selection of dispersion hardening parameters to assure improvement of technological quality in terms of mechanical properties of a clamping element of energy network suspension, poured from hypoeutectic silumin of the LM25 brand; performed on the basis of experimental research program with use of the ATD method, serving to determination of temperature range of solutioning and ageing treatments. The heat treatment performed in laboratory conditions on a component of energy network suspension has enabled increase of the tensile strength Rm and the hardness HB with about 60-70% comparing to the casting without the heat treatment, when the casting was solutioned at temperature 520 oC for 1 hour and aged at temperature 165 oC during 3 hours.
Źródło:
Archives of Foundry Engineering; 2016, 16, 3; 89-94
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of T6 Heat Treatment Parameters on Technological Quality of the AlSi7Mg Alloy
Autorzy:
Pezda, J.
Jarco, A.
Powiązania:
https://bibliotekanauki.pl/articles/383288.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat treatment
aluminum alloy
tensile strength
elongation
impact strength
obróbka cieplna
stop aluminium
wytrzymałość na rozciąganie
wydłużenie
udarność
Opis:
Very well-known advantages of aluminum alloys, such as low mass, good mechanical properties, corrosion resistance, machining-ability, high recycling potential and low cost are considered as a driving force for their development, i.e. implementation in new applications as early as in stage of structural design, as well as in development of new technological solutions. Mechanical and technological properties of the castings made from the 3xx.x group of alloys depend mainly on correctly performed processes of melting and casting, design of a mould and cast element, and a possible heat treatment. The subject-matter of this paper is elaboration of a diagrams and dependencies between parameters of dispersion hardening (temperatures and times of solutioning and ageing treatments) and mechanical properties obtained after heat treatment of the 356.0 (EN AC AlSi7Mg) alloy, enabling full control of dispersion hardening process to programming and obtaining a certain technological quality of the alloy in terms of its mechanical properties after performed heat treatments. Obtained results of the investigations have enabled obtainment of a dependencies depicting effect of parameters of the solutioning and ageing treatments on the mechanical properties (Rm, A5 and KC impact strength) of the investigated alloy. Spatial diagrams elaborated on the basis of these dependencies enable us to determine tendencies of changes of the mechanical properties of the 356.0 alloy in complete analyzed range of temperature and duration of the solutioning and ageing operations.
Źródło:
Archives of Foundry Engineering; 2016, 16, 4; 95-100
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inoculation of Austenite Primary Grains in Cast Iron
Autorzy:
Kopyciński, D.
Guzik, E.
Szczęsny, J.
Dorula, J.
Siekaniec, D.
Ronduda, M.
Powiązania:
https://bibliotekanauki.pl/articles/381068.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
crystallization process
grey cast iron
primary austenite grain
inoculation
tensile strength
krystalizacja
żeliwo szare
austenit
wytrzymałość na rozciąganie
Opis:
The modification is a widespread method of improving the strength properties of cast iron. The impact in terms of increasing amounts of eutectic grains has been thoroughly studied while the issue of the impact on the mechanical properties of primary austenite grains has not been studied in depth yet. The paper presents the study of both aspects. The methodology was to conduct the melting cast iron with flake graphite, then modifying the alloy by two sets of modifiers: the commercial modifier, and a mixture of iron powder with a commercial inoculant. The DAAS test was carried out to identify the primary austenite grains. The degree of supercooling was determined and the UTS test was performed as well. Additionally carried out the metallographic specimen allowing for counting grains. It can be concluded that the introduction of the iron powder significantly improved the number of austenite primary grains which resulted in an increase in tensile strength UTS.
Źródło:
Archives of Foundry Engineering; 2014, 14, 4; 45-48
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of water glass modification with nanoparticles of zinc oxide on selected physical and chemical properties of binder and mechanical properties of sand mixture
Autorzy:
Kmita, A.
Hutera, B.
Olejnik, E.
Janas, A.
Powiązania:
https://bibliotekanauki.pl/articles/381352.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thermal synthesis
ZnO nanoparticles
wettability
tensile strength
moulding sand
synteza termiczna
nanocząsteczki ZnO
wytrzymałość na rozciąganie
masa formierska
Opis:
In this paper, an attempt was made to use the ZnO nanoparticles as a modifier of foundry binder - water glass. The modifier was a colloidal suspension of the ZnO zinc oxide nanoparticles in propanol. A thermal method to obtain metal oxide nanoparticles was adopted. The modifier was product of the thermal decomposition of the basic zinc carbonate ([ZnCO3]2•[Zn(OH)2]3), and was introduced into the water glass in an amount of 1 and 3 wt%. To determine the interfacial reactions taking place in a quartz - modified water glass system, the binder wettability of the quartz grains was measured. The effect of water glass modification on the mechanical properties of moulding sands was verified by testing the tensile strength Rmu of moulding sands with the modified binders. Water glass modification with the colloidal solution of ZnO nanoparticles in propanol confirmed the effect of modifier on the water glass wettability of sand grains and on the mechanical properties of the sand mixtures with this additive.
Źródło:
Archives of Foundry Engineering; 2012, 12, 2s; 37-40
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the Mechanical Properties of Gray Cast Iron Using Electrical Resistivity Measurement
Autorzy:
Bieroński, M.
Krasa, O.
Koza, M.
Książek, D.
Kuś, R.
Powiązania:
https://bibliotekanauki.pl/articles/380834.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
resistance
grey cast iron
tensile strength
NDT method
electrical resistivity
odporność
żeliwo szare
wytrzymałość na rozciąganie
metoda NDT
Opis:
In this paper an attempt to determine the relationship between the electrical resistivity and the tensile strength and hardness of cast iron of carbon equivalent in the range from 3.93% to 4.48%. Tests were performed on the gray cast iron for 12 different melts with different chemical composition. From one melt poured 6 samples. Based on the study of mechanical and electro-resistive determined variation characteristics of tensile strength, hardness and resistivity as a function of the carbon equivalent. Then, regression equations were developed as power functions describing the relationship between the resistivity of castings and their tensile strength and hardness. It was found a high level of regression equations to measuring points, particularly with regard to the relationship Rm=f(ρ). The obtained preliminary results indicate the possibility of application of the method of the resistance to rapid diagnostic casts on the production line, when we are dealing with repeatable production, in this case non variable geometry of the product for which it has been determinated before a regression equation.
Źródło:
Archives of Foundry Engineering; 2016, 16, 4; 29-32
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Metal Oxides Nanoparticles on the Selected Strength Properties of Moulding Sand with Water Glass
Autorzy:
Kmita, A.
Powiązania:
https://bibliotekanauki.pl/articles/381812.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative material
foundry technology
water glass
nanoparticles
tensile strength
materiał innowacyjny
technologia odlewnicza
szkło wodne
nanocząstka
wytrzymałość na rozciąganie
Opis:
The modification of water glass with nanoparticles of metal oxides in organic solvents was attempted in the study. The results of investigations of moulding sands with water glass modified by nanoparticles of the selected metal oxides in organic solvents, are presented in the hereby paper [21]. Nanoparticles of ZnO, Al2O3 or MgO in methanol, ethanol or propanol solutions were applied as modifiers of binding agents. Colloidal solutions of the modifiers were introduced into water glass in the amounts of 3, 5 or 7 mass %. Influences of the applied modifier and organic solvents as well as the modifier fraction in the binder on the selected strength properties of moulding sands were tested. On the bases of the analyses of the obtained results the probable mechanism of the water glass modification with nanoparticles of metal oxides was proposed.
Źródło:
Archives of Foundry Engineering; 2015, 15, 3 spec.; 33-38
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Various Types of Heat Treatment on Mechanical Properties of the EN AC-AlSi6Cu4 Alloy
Autorzy:
Jarco, A.
Pezda, J.
Powiązania:
https://bibliotekanauki.pl/articles/382485.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat treatment
aluminum alloy
ATD method
elongation
tensile strength
obróbka cieplna
stop aluminium
metoda ATD
wydłużenie
wytrzymałość na rozciąganie
Opis:
The Al-Si-Cu alloys with content of the copper from 2 to 4 percent, after solutioning and artificial ageing treatments (T6 heat treatment), feature high strength and very high hardness, however their elongation is considerably reduced. Maintaining value of elongation on the level of initial alloy is possible due to homogenizing treatment performed prior the T6 treatment. Performed strength tests of the initial alloy and the alloy after individual types of the heat treatment enable comparison of obtained results and assessment of usability of the investigated alloy to production of a castings. Test pieces to the strength tests were poured in standardized metal moulds. Parameters of the heat treatment, temperature and duration of heating were established on base of the literature and the ATD diagram performed for the investigated alloy. Investigated EN AC-AlSi6Cu4 alloy after homogenizing treatment becomes plastic, its elongation A5 and its impact strength KC increase nearly three times, with slight decrease of the tensile strength Rm. Dispersion hardening in connection with the homogenizing treatment results in increase of the tensile strength Rm with 68%, hardness and impact strength with 40% with elongation at level of the alloy without heat treatment. Making suitable selection of various types of the heat treatment it is possible, depending on needs, to control mechanical properties of the alloy.
Źródło:
Archives of Foundry Engineering; 2015, 15, 2 spec.; 35-38
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Repair of Structural Steel Surface Groove by Using Flame Welding Method by Spraying Pure Iron Powder
Autorzy:
Keyhany, P.
Vahdat, S. E.
Powiązania:
https://bibliotekanauki.pl/articles/381026.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
structural steel
repair
welding
tensile strength
mechanical properties
oxyacetylene
reducing flame
konstrukcje stalowe
naprawa
spawanie
wytrzymałość na rozciąganie
własności mechaniczne
Opis:
To improve mechanical properties and increasing useful life of metal pieces, different methods of welding are used for repairing surface crack of metal pieces. In this research, performance of flame welding method by spraying pure iron powder evaluated for repairing surface grooves of structural steel. First, four specimens including one control specimen and other three specimens grooved specimens in depth of 1mm and in length of 12.5mm and groove width in the sizes of 0.5, 0.75 and 1mm.were prepared then, powder melted using oxyacetylene reducing flame and spraying iron powder in the flame path and attached to the inner surface of the groove and finally, the specimen repaired. Results showed that after repairing surface groove, tensile strength of the repaired specimens were reached to the tensile strength of control specimen with the margin of 2.5%.
Źródło:
Archives of Foundry Engineering; 2016, 16, 3; 167-171
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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