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Tytuł:
Influence of Rare Earth Metals on Microstructure and Mechanical Properties of G20Mn5 Cast Steel
Autorzy:
Kasińska, J.
Powiązania:
https://bibliotekanauki.pl/articles/379581.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
G20Mn5
rare earth metals
modification
microstructure
impact toughness
metale ziem rzadkich
modyfikacja
mikrostruktura
odporność na uderzenia
Opis:
The paper describes influence of rare earth metals (REMs) on G20Mn5 cast steel microstructure and mechanical properties. The cerium mixture of the following composition was used to modify cast steel: 49.8% Ce, 21.8% La, 17.1% Nd, 5,5% Pr and 5.35% of REMs. Cast steel was melted in industrial conditions. Two melts of non-modified and modified cast steel were made. Test ingots were subject to heat treatment by hardening (920°C/water) and tempering (720°C/air). Heat treatment processes were also performed in industrial conditions. After cutting flashes off samples of cast steel were collected with purpose to analyze chemical composition, a tensile test and impact toughness tests were conducted and microstructure was subject to observations. Modification with use of mischmetal did not cause significant changes in cast steel tensile strength and yield strength, while higher values were detected for fractures in the Charpy impact test, as they were twice as high as values for the data included in the PN-EN 10213:2008 standard. Observations performed by means of light and scanning microscopy proved occurrence of significant differences in grain dimensions and morphology of non-metallic inclusions. Adding REMs resulted in grain fragmentation and transformed inclusion shapes to rounded ones. Chemical composition analyses indicated that round inclusions in modified cast steel were generally oxysulphides containing cerium and lanthanum. In the paper the author proved positive influence of modification on G20Mn5 cast steel mechanical properties.
Źródło:
Archives of Foundry Engineering; 2018, 18, 3; 37-42
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Changes of the Size And Structure of Ferry Transport in the Baltic Sea Region in the Years 2011–2014
Ocena zmian w wielkości i strukturze transportu promowego w regionie Morza Bałtyckiego w latach 2011–2014
Autorzy:
Kasińska, J.
Powiązania:
https://bibliotekanauki.pl/articles/319636.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
Baltic Sea Region
BSR
ferry
ro-ro
transport
region Morza Bałtyckiego
promy
Opis:
The aim of the research was an attempt to find the answer for basic research question: To what extent the ferry transport in the BSR has changed in recent years? Analysis of data and assessment became the main research methods. In addition, the functions of linear trends for the selected variables included in the study were estimated. The article presents the multi-aspects analysis of the transport of goods and passengers by ferry/ro-ro fleet in the Baltic Sea Region in 2011–2014. Following issues have been discussed: ferry/ro-ro fleets of the top 30 Baltic operators, ferry/ro-ro passengers in the top 30 Baltic ports, the number and structure of the transport of goods, passengers and freight units.
Celem artykułu było przeanalizowanie zmian, jakie zaszły w wielkości i strukturze przewozów promowych w Regionie Morza Bałtyckiego w latach 2011–2014. W artykule przedstawiono wieloaspektową analizę wielkości i struktury przewozów promowych/ ro-ro w Regionie Morza Bałtyckiego (RMB) w latach 2011–2014. Badaniu poddano takie zmienne, jak: wielkość floty 30 największych operatorów, liczbę pasażerów w 30 największych portach, wielkość i strukturę rodzajową przewozów i liczbę jednostek frachtowych. Do najważniejszych portów RMB pod względem liczby pasażerów zaliczyć należy następujące: Helsinki (Finlandia), Tallinn (Estonia), Sztokholm (Szwecja), Helsingborg (Szwecja), Helsingør (Dania), Puttgarden (Niemcy) i Rødby (Dania). W 2014 roku przyjęły one łącznie 54 920 tys. pasażerów (59% udział w rynku). W tym samym roku największe obroty jednostkami frachtowymi odnotowano w portach: Lübeck/ Travemünde (744 860), Trelleborg (670 776), Helsinki (503 354), Gothenburg (497 609), Rostock (444 781), Puttgarden (412 151) i Rødby.
Źródło:
Zeszyty Naukowe. Problemy Transportu i Logistyki / Uniwersytet Szczeciński; 2015, 32; 7-20
1640-6818
Pojawia się w:
Zeszyty Naukowe. Problemy Transportu i Logistyki / Uniwersytet Szczeciński
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Rare Earth Metals on Microstructure and Inclusions Morphology G17CrMo5-5 Cast Steel
Wpływ metali ziem rzadkich na strukturę i morfologię wtrąceń w staliwie G17CrMo5-5
Autorzy:
Kasińska, J.
Powiązania:
https://bibliotekanauki.pl/articles/355689.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cast steel
modification
rare earth metals
non-metallic inclusions
cerium
staliwo
modyfikacja
metale ziem rzadkich
wtrącenia niemetaliczne
cer
Opis:
This paper presents influence of rare earth metals (REM) on the microstructure and morphology of non-metallic inclusions of G17CrMo5-5 cast carbon steel The research has been performed on successive industrial melts. Each time about 2000 kg of liquid metal was modified. The REM was in the form of mishmetal of the composition 49,8% Ce, 21, 8% La, 17, 1% Nd, 5, 5% Pr and 5, 35% the rest of REM. Therareearth metals were put into the ladle during tapping of heat melt from the furnace.
W artykule przedstawiono rolę metali ziem rzadkich na strukturę I morfologię wtrąceń niemetalowych w staliwie węglowym G17CrMo5-5. Badania prowadzono na seryjnych wytopach przemysłowych. Każdorazowo modyfikacji poddawano po około 2000kg ciekłego metalu. Metale ziem rzadkich wprowadzano w postaci miszmetalu o składzie: 49, 8% Ce, 21, 8% La, 17, 1% Nd, 5, 5% Pr and 5, 35%. Metale ziem rzadkich wprowadzano do kadzi podczas spustu ciekłego metalu z pieca.
Źródło:
Archives of Metallurgy and Materials; 2014, 59, 3; 993-996
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Morphology of Impact Fracture Surfaces in Manganese Cast Steel Modified by Rare Earth Elements
Autorzy:
Kasińska, J.
Powiązania:
https://bibliotekanauki.pl/articles/946876.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cast steel
modification
REM
impact strength
fracture analysis
staliwa
modyfikacja
siła uderzenia
pęknięcia
Opis:
The morphology of G20Mn5 specimens made of non-modified and rare earth metals (REM) modified cast steel was investigated. Molten metal was treated with a cerium-rich mischmetal contain 49.8% Ce, 21.8% La, 17.1% Nd, 5.5% Pr and 5.35% other rare earth metals making up the balance. The melting, quenching (920°C/water) and tempering (720°C/air) were performed under industrial conditions. Analysis included G20Mn5 cast steel fracture specimens subjected to Charpy V-notch impact testing at 20°C, -30°C and -40°C. The purpose of the analysis was to determine the influence of REM on the microstructure and mechanical properties of G20Mn5 cast steel and the REM effect on the morphology, impact strength and character of the fracture surfaces. In addition, a description of the mechanism by which fracture occurred in the two materials was proposed. The author demonstrated the beneficial effects of adding REM to molten steel, manifested by a 20 - 40% increase in impact toughness, depending on test temperature, as compared to the non-modified cast steel. Important findings included more than 100% increase in impact strength in comparison with the required impact toughness of 27J at -40C for heat treated steels (EN 10213).
Źródło:
Archives of Foundry Engineering; 2020, 20, 2; 89-94
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wide - ranging influence of mischmetal on properties of GP240GH cast steel
Autorzy:
Kasińska, J.
Gajewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/380292.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
staliwo węglowe
REM
właściwości mechaniczne
wtrącenia niemetaliczne
cast carbon steel
mechanical properties
non-metallic inclusions
Opis:
This paper presents influence of rare earth metals (REM) on the properties of GP240GH cast carbon steel. The research has been performed on successive industrial melts. Each time ca 2000 kg of liquid metal was modified. The rare earth metals were put into the ladle during tapping of heat melt from the furnace. Because of this the amount of sulphur in the cast steel was decreased and the non-metallic inclusion morphology was significantly changed. It was found that non metallic inclusions the cracking mechanism of Charpy specimens and the impact strength were all changed. The following properties were tested: mechanical properties [...], plastic properties (necking, elongation) and impact strength (SCI). In the three-point bend test the KJC stress intensity factor was evaluated.
Źródło:
Archives of Foundry Engineering; 2012, 12, 4; 85-94
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Cr - Ni 18/9 austenitic cast steel modification by mischmetal
Autorzy:
Gajewski, M.
Kasińska, J.
Powiązania:
https://bibliotekanauki.pl/articles/380312.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
staliwo austenityczne
modyfikacja
miszmetal
właściwości mechaniczne
korozja międzykrystaliczna
austenitic cast steel
modification
mechanical properties
intergranular corrosion
Opis:
This paper presents the results of Cr - Ni 18/9 austenitic cast steel modifications by mischmetal. The study was conducted on industrial melts. Cast steel was melted in an electric induction furnace with a capacity of 2000 kg and a basic lining crucible. The mischmetal was introduced into the ladle during tapping of the cast steel from the furnace. The effectiveness of modification was examined with the carbon content of 0.1% and the presence of \delta ferrite in the structure of cast steel stabilized with titanium. The changes in the structure of cast steel and their effect on mechanical properties and intergranular corrosion were studied. It was found that rare earth metals decrease the sulfur content in cast steel and above all, they cause a distinct change in morphology of the \delta ferrite and non-metallic inclusions. These changes have improved mechanical properties. R02, Rm, and A5 and toughness increased significantly. There was a great increase of the resistance to intergranular corrosion in the Huey test. The study confirmed the high efficiency of cast steel modification by mischmetal in industrial environments. The final effect of modification depends on the form and manner of placing mischmetal into the liquid metal and the melting technology, ie the degree of deoxidation and desulfurization of the metal in the furnace.
Źródło:
Archives of Foundry Engineering; 2012, 12, 4; 47-52
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Rare Earth Metal Addition on Wear Resistance of Chromium-Molybdenum Cast Steel
Autorzy:
Kasińska, J.
Kalandyk, B.
Powiązania:
https://bibliotekanauki.pl/articles/381581.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wear resistant alloys
cast steel
rare earth metals
Miller test
surface profile
stopy odporne na zużycie
stal
metale ziem rzadkich
test Millera
profil powierzchni
Opis:
This paper discusses changes in the microstructure and abrasive wear resistance of G17CrMo5-5 cast steel modified with rare earth metals (REM). The changes were assessed using scanning microscopy. The wear response was determined in the Miller test to ASTM G75. Abrasion tests were supplemented with the surface profile measurements of non-modified and modified cast steel using a Talysurf CCI optical profilometer. It was demonstrated that the modification substantially affected the microstructure of the alloy, leading to grain size reduction and changed morphology of non-metallic inclusions. The observed changes in the microstructure resulted in a three times higher impact strength (from 33 to 99 kJ/cm2) and more than two times higher resistance to cracking (from 116 to 250 MPa). The following surface parameters were computed: Sa: Arithmetic mean deviation of the surface, Sq: Root-mean-square deviation of the surface, Sp: Maximum height of the peak, Sv: Maximum depth of the valley, Sz: Ten Point Average, Ssk: Asymmetry of the surface, Sku: Kurtosis of the surface. The findings also indicated that the addition of rare earth metals had a positive effect on the abrasion behaviour of G17CrMo5-5 cast steel.
Źródło:
Archives of Foundry Engineering; 2017, 17, 3; 63-68
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surfacing 24Cr-5Ni-2.5Mo Duplex Steel Castings by TIG
Autorzy:
Kasinska, J.
Skrzypczyk, A.
Kalandyk, B.
Powiązania:
https://bibliotekanauki.pl/articles/379970.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
duplex cast steel
surfacing
Tungsten Inert Gas method
solution heat treatment
microstructure change
staliwo duplex
proces napawania
metoda TIG
obróbka cieplna
Opis:
This article discusses the influence of Tungsten Inert Gas (TIG) surfacing of duplex cast steel on its hardness and structure. The samples of 24Cr-5Ni-2.5Mo ferritic-austenitic cast steel were subjected to single-overlay processes with the use of solid wire having the chemical composition similar to that of the duplex cast steel. As a result of the surfacing, the welds were obtained that had no welding imperfections with a smooth transition to the base material. In the test without the heat treatment, directly below the fusion line, we observe a ferrite band with a width of approximately 200 μm without visible austenite areas. Some of the samples were then solution treated (1060°C). Both variants, without and after solution heat treatment, were subjected to testing. Significant changes in the microstructure of the joint were observed after the heat treatment process (heat affected zone and weld microstructure changes). In both areas, an increase in the austenite volume fraction after solution heat treatment was observed. Changes in the microhardness of the ferrite in the HAZ area directly below the fusion line were also observed.
Źródło:
Archives of Foundry Engineering; 2018, 18, 2; 15-20
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence Of The Rare Earth Metals Modification On The Fracture Toughness Of G17CrMo5-5 Cast Steel At Low Temperatures
Wpływ modyfikacji metalami ziem rzadkich na odporność na pękanie staliwa G17CrMo5-5 w obniżonych temperaturach
Autorzy:
Dzioba, I.
Kasińska, J.
Pała, R.
Powiązania:
https://bibliotekanauki.pl/articles/356767.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
modification
rare earth metals (REM)
fracture toughness
master curve
temperature of brittle-to-ductile transition
modyfikacja
metale ziem rzadkich
odporność na pękanie
krzywa wzorcowa
temperatura przejścia w stan kruchy
Opis:
This paper presents the influence of the rare earth metals (REM) modification on mechanical properties and fracture toughness of G17CrMo5-5 cast steel at low temperatures. The REM was in the form of mishmetal. The research has been performed on serial (several) industrial melts. The fracture toughness values of unmodified and modified cast steel at the temperature range from −80°C to 20°C were tested. The reference temperatures of the brittle-to-ductile transition, TQ, for both unmodified and modified cast steel were determined. The positive influence of the modification by REM on the fracture toughness and the reference temperature TQ are shown.
Artykuł przedstawia wpływ modyfikacji metalami ziem rzadkich na własności mechaniczne i odporność na pękanie staliwa G17CrMo5-5 w obniżonych temperaturach. Metale ziem rzadkich wprowadzano w postaci mischmetalu. Badania prowadzone były na wytopach przemysłowych. Odporność na pękanie była badana na staliwie niemodyfikowanym i modyfikowanym metalami ziem rzadkich w zakresie temperatur od −80°C do +20°C. Została wyznaczona temperatura przejścia w stan kruchy TQ dla obu wytopów tj. modyfikowanego i niemodyfikowanego. Przedstawiono pozytywny wpływ modyfikacji na odporność na pękanie oraz temperaturę TQ.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 2A; 773-777
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Napawanie warstw trudnościeralnych na stali Hardox metodami OAW i MMA
Deposition of hardfacing layers on Hardox steel by OAW and MMA
Autorzy:
Skrzypczyk, A.
Rutkowski, S.
Kasińska, J.
Powiązania:
https://bibliotekanauki.pl/articles/195622.pdf
Data publikacji:
2018
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
napawanie ręczne
spoiwa
węglik chromu
węglik wolframu
manual hardfacing
filler metal
chromium carbide
tungsten carbide
Opis:
W artykule przedstawiono efekty napawania warstw trudnościeralnych w postaci węgliku chromu i wolframu na stali Hardox. Napoiny układano ręcznie na odcinki blachy o wymiarach 120x80x10 mm metodami OAW (Oxy Acetylene Welding – 311) oraz MMA (Manual Metal Arc Welding – 111) pod kątem doboru optymalnych parametrów technologicznych. Przeprowadzono obserwacje mikroskopowe z obszaru napoiny, linii wtopienia i strefy wpływu ciepła. Dokonano analizy rozkładu pierwiastków na granicy napoina–materiał podstawowy. Dla obu wariantów technologicznych wykonano badania rozkładu twardości na przekrojach poprzecznych napoin. Autorzy pokazali wpływ zastosowanych technologii na sposób kształtowania się napoin oraz na ich właściwości.
This paper presents the effects of chromium and tungsten carbide hardfacing on Hardox steel. The padding welds were applied manually on the 120x80x10 mm steel plate sections using Oxy Acetylene Welding (311) and Manual Metal Arc Welding (111) to find the optimum processing parameters. The macrostructure of the padding welds was analyzed for quality. Microscopic observations of the padding weld, fusion line and heat affected zone were performed. The element distribution at the padding weld – base material boundary was analyzed. The distribution of hardness was investigated on the padding weld cross-sections for both technological variants. The authors demonstrated the influence of the technologies used on the formation mechanism and properties of the padding welds.
Źródło:
Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika; 2018, z. 90 [298], 2; 213-222
0209-2689
2300-5211
Pojawia się w:
Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Heat Treatment on the Microstructures 20%Cr-21%Ni-5%Si Cast Steel
Autorzy:
Kalandyk, B.
Kasińska, J.
Olejnik, E.
Powiązania:
https://bibliotekanauki.pl/articles/381678.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
austenitic cast steel
stainless steel
cast steel microstructure
heat treatment
staliwo austenityczne
stal nierdzewna
mikrostruktura staliwa
obróbka termiczna
Opis:
The study describes the effect of heat treatment on the microstructure of cast high-alloyed 20%Cr-21%Ni-5%Si steel. It has been found that the microstructure of the tested material in the initial state consists of an austenitic matrix and precipitates rich in Si, Cr, Ni and Mn, characterized by different morphology and distributed mainly along the grain boundaries. The conducted heat treatment (after solutioning at: 1060, 1100 and 1200ºC) has changed both morphology and chemical composition of the precipitates. Significant reduction in the Si and Ni content and slight increase in the Cr content, especially after solutioning at 1200°C, combined with a simultaneous decrease in the hardness of the precipitates was evidenced.
Źródło:
Archives of Foundry Engineering; 2015, 15, 2 spec.; 39-42
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental – Numerical Analysis of Stress State in Front of the Crack Tip of Modified and Unmodified G17CrMo5-5 Cast Steel by Rare Earth Metals in a Brittle-Ductile Transition Region
Autorzy:
Dzioba, I.
Pala, A.
Kasinska, J.
Powiązania:
https://bibliotekanauki.pl/articles/350967.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fracture toughness in a brittle-to-ductile transition region
stress distributions in front of the crack
cast steel
modification by rare earth metals
Opis:
In the paper presented experimental data and numerical analysis of stress distribution in front of the crack of two melts of low-alloy G17CrMo5-5 cast steel-modified (M) by rare earth metals and original, unmodified (UM) in the temperature range, according to the brittle-ductile transition region. Experimental tests include determination of the tensile properties and fracture toughness characteristics for the UM and M cast steel. Numerical analysis includes determination of stress distribution in front of the crack at the initial moment of the crack extension. In the numerical computations, experimentally tested specimens SEN(B) were modeled. The true stress-strain curves for the UM and M cast steel were used in the calculation. It was shown that the maximum of the opening stresses at the initial moment of the crack extension occurs in the axis of the specimens and reaches similar level of about 3.5σ0 for both UM and M cast steel. However, the length of the critical distance, measured for stress level equal 3σ0, is great for the M in comparison to the UM cast steel. Also was shown that the UM cast steel increased the level of the stress state triaxiality parameters that resulted in a decrease of fracture toughness.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2B; 1175-1181
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Tungsten on the Structure and Properties of Ductile Iron Containing 0.8% Cu
Autorzy:
Myszka, Dawid
Kasińska, J.
Penkul, A.
Powiązania:
https://bibliotekanauki.pl/articles/2126899.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
metallography
mechanical properties
tungsten
cast iron
metalografia
właściwości mechaniczne
wolfram
żeliwo
Opis:
The possibilities of producing ductile cast iron with the addition of 1÷3% of tungsten are presented. Tungsten from waste chips from mechanical processing was introduced into the liquid cast iron in the form of specially prepared cartridges. Correct dissolution of tungsten in the metal bath was found, and there were no casting defects in the alloy. The form of carbide precipitates in the microstructure of cast iron was determined and the influence of increasing tungsten content on the reduction of the number of graphite precipitates in the structure was determined. Impact tests show that this property degrades with increasing tungsten content as opposed to hardness which increases. It was found that the addition of tungsten from machining waste is a potential source of enrichment of cast iron with this element.
Źródło:
Archives of Foundry Engineering; 2021, 21, 4; 121--126
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of AlSi9Cu3 Alloy Crystallization Process with Increased Iron Content at Different Number of Remelts
Autorzy:
Matejka, M.
Bolibruchova, D.
Kasińska, J.
Kuriš, M.
Powiązania:
https://bibliotekanauki.pl/articles/380082.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Al-Si-Cu
remelting
thermal analysis
structural analysis
przetapianie
analiza termiczna
analiza strukturalna
Opis:
Monitoring the solidification process is of great importance for understanding the quality of the melt, for controlling it, and for predicting the true properties of the alloy. Solidification is accompanied by the development of heat, the magnitude of which depends on the different phases occurring during solidification. Thermal analysis is now an important part of and tool for quality control, especially when using secondary aluminium alloys in the automotive industry. The effect of remelting on the change of crystallization of individual structural components of experimental AlSi9Cu3 alloy was determined by evaluation of cooling curves and their first derivatives. Structural analysis was evaluated using a scanning electron microscope. The effect of remelting was manifested especially in nucleation of phases rich in iron and copper. An increasing number of remelts had a negative effect after the fourth remelting, when harmful iron phases appeared in the structure in much larger dimensions.
Źródło:
Archives of Foundry Engineering; 2020, 20, 1; 79-83
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Structure and Characteristics of Tribological Systems with Diamond Like Carbon Coatings under Ionic Liquid Lubrication Conditions
Autorzy:
Madej, M.
Ozimina, D.
Kasińska, J.
Hawlena, J.
Powiązania:
https://bibliotekanauki.pl/articles/351659.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
diamond-like carbon coatings
ionic liquids
SEM
nanoindentation
friction
tribological wear
Opis:
The results from the tests on tribological a-C:H diamond coatings deposited by PACVD (plasma assisted chemical vapour deposition) on 100Cr6 steel components are presented in this work. Mechanical properties - nanohardness and Young’s modulus - were assessed by instrumented indentation. Tribological tests were conducted with T-01M tester in a ball-on-disc test under dry and boundary friction conditions. Selected ionic liquids - synthetic new generation lubricants - were used for lubrication. The results from the experiments indicate that diamond-like coatings improved tribological characteristics of the friction pairs tested, with the ionic liquids intensifying this effect.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2B; 1169-1174
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 19

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