Autor: Orłowicz, W. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Geometry of remeltings and efficiency of the surface remelting process applied to cobalt alloy castings
Autorzy:: Mróz, M.
Orłowicz, W.
Tupaj, M.
Powiązania:: https://bibliotekanauki.pl/articles/381741.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: MAR-M509 alloy
surface remelting
remelting geometry
thermal efficiency
melting efficiency
stop MAR M509
przetapianie powierzchniowe
geometria przetopienia
sprawność cieplna
efektywność topienia
Opis:: The paper summarises results of measurements of remelting area geometry, thermal efficiency and melting efficiency characterising the surface remelting process applied to castings of MAR-M-509 cobalt alloy. The remelting process was carried out with the use of GTAW (Gas Tungsten Arc Welding) method in protective atmosphere of helium, at the electric current intensity in the range from 100 A to 300 A, and the electric arc scanning velocity v_s in the range from 200 mm/min to 800 mm/min. The effect of current intensity and electric arc scanning velocity on geometrical parameters of remeltings, thermal efficiency, and melting efficiency characterising the remelting process has been determined.
Źródło:: Archives of Foundry Engineering; 2013, 13, 2; 95-98
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Korozja stali i żeliwa sferoidalnego ferrytycznego w ciekłej cynie
Corrosion of steel and spheroidal ferritic cast iron in liquid tin
Autorzy:: Opiekun, Z. A.
Orłowicz, W. A.
Powiązania:: https://bibliotekanauki.pl/articles/391725.pdf
Data publikacji:: 2013
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:: korozja
stal austenityczna
stal konstrukcyjna
żeliwo sferoidalne ferrytyczne
ciekła cyna
corrosion
austenitic steel
construction steel
spheroidal ferritic cast iron
liquid tin
Opis:: W artykule przedstawiono przebieg korozji w ciekłej cynie próbek z żeliwa sferoidalnego ferrytycznego, próbek ze stali austenitycznej chromowo-niklowej X2CrNi 19-12 (00H18N10) i próbek ze stali konstrukcyjnej niskostopowej 12CrMo 4-5 (15HM). Próby oddziaływania wykonano przy stałej temperaturze ciekłej cyny 600°C w czasie 170 h. Przeprowadzone badania metalograficzne wykazały, że najszybciej korozji w ciekłej cynie (z szybkością 0,12 mm/h) ulegały próbki ze stali X2CrNi 19-12, wolniej próbki ze stali 12CrMo 4-5 (szybkość korozji około 0,004 mm/h), a najwolniej korodowały próbki z żeliwa sferoidalnego ferrytycznego (szybkość korozji około 0,003 mm/h).
The article presents a course of static corrosion of spheroidal ferritic cast iron, austenite stainless steel X2CrNi19-12 (00H18N10) and samples of low-alloy construction steel 12CrMo4-5 (15HM) in liquid tin. The tests were performed at temperature of 600°C in liquid tin for 170 hours. It has been found, that the fastest corrosion was observed in austenite steel (average rate ca. 0.12 mm/h). Slower corrosion was observed in steel 12CrMo4-5 (average rate ca. 0.004 mm/h) and the slowest corrosion was observed in spheroidal ferritic iron cast specimen (average rate ca. 0.003 mm/h) in liquid tin.
Źródło:: Prace Instytutu Odlewnictwa; 2013, 53, 3; 19-26
1899-2439
Pojawia się w:: Prace Instytutu Odlewnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Stress-rupture Tests of MAR-M-509 Cobalt Alloy Improved by Rapid Solidification
Autorzy:: Mróz, M.
Orłowicz, W.
Tupaj, M.
Powiązania:: https://bibliotekanauki.pl/articles/380367.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: MAR-M509 cobalt alloy
rapid solidification
stress rupture test
stop kobaltu MAR-M509
krystalizacja szybka
Opis:: In the paper, results of stress-rupture test applied to MAR-M-509 cobalt alloy specimens, in as-cast condition and with microstructure shaped under rapid solidification conditions are presented. The material for the study were castings of MAR-M509 alloy obtained by means of the investment casting method. The rapid solidification conditions were obtained by means of remelting process carried out with the use of GTAW method. The effect of rapid solidification following the remelting process is a refinement of microstructure in castings of MAR-M509 alloy and significant extension of the time to rupture in stress-rupture test.
Źródło:: Archives of Foundry Engineering; 2013, 13, 1 spec.; 117-120
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Stress rupture test of MAR-M509 alloy with structure refined by rapid resolidification
Autorzy:: Mróz, M.
Orłowicz, W.
Tupaj, M.
Trytek, A.
Powiązania:: https://bibliotekanauki.pl/articles/380450.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: stop MAR M509
mikrostruktura
MAR-M509 alloy
rapid resolidification
microstructure
stress rupture test
Opis:: This study presents results of stress rupture test of MAR-M-509 cobalt alloy samples, as-cast and after surface refining with a concentrated stream of heat. Tests were conducted on samples of MAR-M-509 alloy castings, obtained using the lost-wax method. Casting structure refining was performed with the GTAW method in argon atmosphere, using the current I = 200 A and electrical arc scanning velocity vs = 100, 150, 200 and 250 mm/min. The effect of rapid resolidification of the MAR-M-509 alloy on the microstructure was examined and significant improvement in stress rupture test was observed.
Źródło:: Archives of Foundry Engineering; 2012, 12, 4; 117-120
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Examination of cast iron material properties by means of the nanoindentation method
Autorzy:: Trytek, A.
Orłowicz, W.
Tupaj, M.
Mróz, M.
Powiązania:: https://bibliotekanauki.pl/articles/380438.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: żeliwo
krystalizacja szybka
próba indentacji
cast iron
rapid crystallization
indentation test
Opis:: The paper presents results of examination of material parameters of cast iron with structure obtained under rapid resolidification conditions carried out by means of the nanoindentation method.
Źródło:: Archives of Foundry Engineering; 2012, 12, 4; 141-144
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Examination of Cast Iron Material Properties by Means of the Scratch Method
Autorzy:: Trytek, A.
Orłowicz, W.
Mróz, M.
Tupaj, M.
Powiązania:: https://bibliotekanauki.pl/articles/382221.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: cast iron
structure
GTAW process
scratch test
żeliwo
struktura
proces GTAW
test zarysowania
Opis:: The paper presents results of examination of unalloyed cast iron with diversified structure of the metallic matrix carried out by means of the scratch method. The research work was carried out with cast sample plates and with castings superficially remelted by means of the Gas Tungsten Arc Welding (GTAW) method. The test was carried out with load force of 5 N. Parameters such as the coefficient of friction, penetration depth, and acoustic emission were analysed.
Źródło:: Archives of Foundry Engineering; 2012, 12, 2s; 75-80
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Hydrościerne zużycie łopatek wirników pomp pogłębiarek ssących
The rotor blades hydroabrasion consumption of sand pump dredges
Autorzy:: Opiekun, Z. A.
Orłowicz, A. W.
Powiązania:: https://bibliotekanauki.pl/articles/187897.pdf
Data publikacji:: 2012
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: wysokochromowe żeliwo eutektyczne
hydrościerne zużycie
struktura geometryczna powierzchni SGP
mikrostruktura
mikrotwardość
eutectic high-chromium cast iron
hydroabrasion consumption
geometrical product specification (GPS)
microstructure
microhardness
Opis:: W artykule przedstawiono efekty hydrościernego zużywania się żeliwnych łopatek wirnika pompy ssawnej. Wirnik pompy odlany był z wysokochromowego żeliwa eutektycznego (2,4% C; 33,9% Cr; 1,7% Ni; 1,24% Si; 1,21% Cu i 0,43% Mn). W wyniku oddziaływania strugi wodnej z zawartością około 20% cząstek minerału kwarcowego nastąpiło zużycie ścierne łopatek wirnika pompy ssawnej. Zużycie ścierne przebiegało dwuetapowo, przez skrawanie miększego od ziaren kwarcu ferrytu stopowego i zmęczeniowe pękanie oraz wykruszanie się twardszych od kwarcu węglików typu M7C3.
This article presents the effect made of cast iron rotor blades hydroabrasion consumptions in sand pump dredges. The rotor made of eutectic high-chromium cast iron (2.4% C; 33.9% Cr; 1.7% Ni; 1.24% Si; 1.21% Cu; 0.43% Mn). Stream and water with about 20% quartz sand produce abrasive wear of rotor blades across the surface of the blades. The abrasive wear produces shavings of alloying ferrite and fatigue cracking and crumble out M7C3 type carbides.
Źródło:: Tribologia; 2012, 1; 109-118
0208-7774
Pojawia się w:: Tribologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Corrosion of AlSi 304L Austenitic Stainless Steel in Non-Stationary Aqueous HCl + NaCl Solution
Autorzy:: Opiekun, Z. A.
Orłowicz, A. W.
Kupiec, B.
Powiązania:: https://bibliotekanauki.pl/articles/383327.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: austenitic stainless steel
structures
hardness
microhardness
stress
corrosion
stal austenityczna
struktury
twardość
mikrotwardość
naprężenie
korozja
Opis:: The paper describes the process of stress corrosion in a Ø50 mm rod made of AISI 304L austenitic chromium-nickel steel. Discs cut off from the steel rod were moved at a speed of 1.25 m/s for a test period of 408 h in a corrosive environment of aqueous solution containing 3% HCl and 8.6 g NaCl at room temperature. It was found that deepest cracks and irregular pitting occurred locally in areas of microstructure containing grains of hard lamellar &alpha' martensite and along boundaries between filamentary delta ferrite (Feδ) precipitates and &alpha′ phase. The corrosion developed in a trans-crystalline manner with branches propagating along boundaries of lamellar &alpha′ phase grains.
Źródło:: Archives of Foundry Engineering; 2014, 14, 1 spec.; 165-168
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Combustion Engine Cylinder Liners Made of Al-Si Alloys
Autorzy:: Orłowicz, A. W.
Tupaj, M.
Mróz, M.
Trytek, A.
Powiązania:: https://bibliotekanauki.pl/articles/382953.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: combustion engine
cylinder liner
Al-Si alloy
silnik spalinowy
tuleja cylindrowa
stop Al-Si
Opis:: The paper deals with problems related to application of aluminum-silicon alloys for combustion engine cylinder liners.
Źródło:: Archives of Foundry Engineering; 2015, 15, 2; 71-74
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Improvement of Al-Si Alloy Fatigue Strength by Means of Refining and Modification
Autorzy:: Tupaj, M.
Orłowicz, A. W.
Trytek, A.
Mróz, M.
Powiązania:: https://bibliotekanauki.pl/articles/379844.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Al-Si alloy
fatigue limit
refining
modification
stop Al-Si
granica zmęczenia
rafinacja
modyfikacja
Opis:: The paper presents results of a study concerning an AlSi7Mg alloy and the effect of subjecting the liquid metal to four different processes: conventional refining with hexachloroethane; the same refining followed by modification with titanium, boron, and sodium; refining by purging with argon carried out in parallel with modification with titanium and boron salts and strontium; and parallel refining with argon and modification with titanium, boron, and sodium salts. The effect of these four processes on compactness of the material, parameters of microstructure, and fatigue strength of AlSi7Mg alloy after heat treatment. It has been found that the highest compactness (the lowest porosity ratio value) and the most favorable values of the examined parameters of microstructure were demonstrated by the alloy obtained with the use of the process including parallel purging with argon and modification with salts of titanium, boron, and sodium. It has been found that in the fatigue cracking process observed in all the four variants of the liquid metal treatment, the crucial role in initiation of fatigue cracks was played by porosity. Application of the process consisting in refining by purging with argon parallel to modification with Ti, B, and Na salts allowed to refine the microstructure and reduce significantly porosity of the alloy extending thus the time of initiation and propagation of fatigue cracks. The ultimate effect consisted in a distinct increase of the fatigue limit value.
Źródło:: Archives of Foundry Engineering; 2019, 4; 61-66
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Fatigue Properties of AlSi7Mg Alloy with Diversified Microstructure
Autorzy:: Tupaj, M.
Orłowicz, A. W.
Mróz, M.
Trytek, A.
Powiązania:: https://bibliotekanauki.pl/articles/380962.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: AlSi7Mg03 alloy
alloy refining
alloy modification
cooling rate
microstructure parameter
fatigue strength
stop AlSi7Mg03
rafinacja stopu
modyfikacja stopu
szybkość chłodzenia
parametr mikrostrukturalny
wytrzymałość zmęczeniowa
Opis:: The paper discusses the effect of microstructure on the fatigue strength of AlSi7Mg casting alloy refined conventionally with hexachloroethane without modifying and modified with TiB and Na. Castings made of both alloy variants were subjected to T6 heat treatment. It turned out that the applied refining secured satisfactory compactness of the material. In view of absence of gas and shrinkage porosity in the castings, short cracks nucleated on largest silicon precipitates and largest intermetallic phase precipitations as these were the locations where stress concentrations reached their highest values. Comprehensive modification of the alloy resulted in reduction of the value of SDAS parameter characterizing α(Al) phase dendrites, a decrease of the distance between silicone precipitates in the eutectic λ_E, and a decrease of the maximum size of silicone precipitates l_maxSi. The ultimate effect of these changes was an increase of the fatigue strength.
Źródło:: Archives of Foundry Engineering; 2015, 15, 3 spec.; 87-90
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Equivalent Heat Load Test on Hot Aircraft Engine Components
Autorzy:: Mróz, Marek
Orłowicz, A. W.
Tupaj, Mirosław
Lenik, Magdalena
Powiązania:: https://bibliotekanauki.pl/articles/27314117.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: heat load
heat barrier
aircraft engine components
obciążenie cieplne
bariera cieplna
elementy silnika samolotu
Opis:: The paper presents the assumptions and methodology for investigating equivalent heat load testing of hot aircraft engine components. The basic heat loads occurring in an aircraft engine during aircraft flight are characterised. Diagrams of the proposed heat loads are presented, together with the number of cycles, and a test bench is characterised and shown to enable equivalent heat load testing of aircraft engine components.
Źródło:: Archives of Foundry Engineering; 2023, 23, 1; 34--36
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Thermal Coefficients of the GTAW Process
Autorzy:: Orłowicz, A. W.
Trytek, A.
Tupaj, M.
Mróz, M.
Powiązania:: https://bibliotekanauki.pl/articles/383027.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: thermal efficiency
remelting process
flow calorimeter
sprawność cieplna
przetapianie
kalorymetr przepływowy
Opis:: The paper presents a discussion on the issue of thermal efficiency of the process of superficial remelting of castings by means of the gas tungsten arc welding (GTAW) process. Described and characterized are calorimeters used in research studies on efficiency of welding processes and the obtained results. Example results are presented from the measurements aimed at determination of thermal efficiency of the welding process carried out with the use of the flow calorimeter.
Źródło:: Archives of Foundry Engineering; 2015, 15, 3 spec.; 63-68
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Materials Used in the Automotive Industry
Autorzy:: Orłowicz, A. W.
Mróz, M.
Tupaj, M.
Trytek, A.
Powiązania:: https://bibliotekanauki.pl/articles/383174.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: automotive industry
foundry material
casting technique
przemysł motoryzacyjny
materiał odlewniczy
technika odlewnicza
Opis:: Elaborated shapes of many car components are the reason for which the use of casting techniques to fabricate them is a solution wellfounded from the economical point of view. Currently applicable regulatory requirements concerning emissions of exhaust fumes force the carmakers to reduce the overall weight of their products, as this is a basic precondition for reducing fuel consumption. As a result, newly launched car models contain a continuously increasing share of thin-walled castings made of materials which ensure a satisfactory level of service properties. At the same time, developing new technological processes allowing to extend the service life of individual components by means of surface improving becomes more and more important.
Źródło:: Archives of Foundry Engineering; 2015, 15, 2; 75-78
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Surface Hardening of Nodular Cast Iron by GTAW Remelting
Autorzy:: Orłowicz, A. W.
Trytek, A.
Korzeniowski, M.
Kupiec, B.
Powiązania:: https://bibliotekanauki.pl/articles/379624.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: solidification process
mechanical properties
nodular cast iron
GTAW process
surface layer
proces krzepnięcia
właściwości mechaniczne
żeliwo sferoidalne
proces GTAW
warstwa powierzchniowa
Opis:: The study reported in this paper was aimed at establishing the effect of values of parameters characterizing the process of superficial remelting of a nodular iron casting on the quantity of introduced heat, geometry of remeltings as well as parameter λ and hardness of cementite eutectic. The remelting process was carried out using GTAW method, at electric arc length of 3 mm in argon atmosphere, welding current intensities I = 50, 130, 210, and 300 A, and electric arc scanning speeds vs = 200, 400, and 800 mm/min. The measurements included estimation of the quantity of heat introduced to the casting in the electric arc-induced remelting process with the use of flow calorimeter. Widths and depths of remetlings were assessed with the use of metallographic method. As a result of fast solidification, cementite eutectic was obtained in remelted material in which, in the course of cooling down to ambient temperature, austenite was subject to partial transformation into martensite. To characterize the cementite eutectic, value of the structural parameter λ was assessed. Values of the parameter were similar for areas of occurrence of both fibrous and laminated eutectic. Remeltings were examined at half of their depths. Micro-hardness measurements were taken in the same areas. The established quantitative relationships may prove to be useful in practice for the purpose of predicting values of parameter λ and hardness of remeltings in studies aimed at improving resistance of cast-iron castings to abrasive wear.
Źródło:: Archives of Foundry Engineering; 2018, 18, 3; 53-58
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 16.

Tytuł:: Determination of Eutectoid Transformation Temperatures in Ductile Cast Iron
Autorzy:: Orłowicz, A. W.
Trytek, A.
Mróz, M.
Tupaj, M.
Powiązania:: https://bibliotekanauki.pl/articles/380051.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: ductile cast iron
eutectoid transformation
cooling rate
żeliwo sferoidalne
przemiana eutektoidalna
szybkość chłodzenia
Opis:: The paper proposes a methodology useful in verification of results of dilatometric tests aimed at determination of temperatures defining the start and the end of eutectoid transformation in the course of ductile cast iron cooling, based on quenching techniques and metallographic examination. For an industrial melt of ductile cast iron, the effect of the rate of cooling after austenitization at temperature 900°C carried out for 30 minutes on temperatures TAr₁ ^start and TAr₁^end was determined. The heating rates applied in the study were the same as the cooling rates and equaled 30, 60, 90, 150, and 300°C/h. It has been found that with increasing cooling rate, values of temperatures TAr₁^start and TAr₁^end decrease by several dozen degrees.
Źródło:: Archives of Foundry Engineering; 2015, 15, 4; 51-54
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 17.

Tytuł:: Shaping the Microstructure of Cast Iron Automobile Cylinder Liners Aimed at Providing High Service Properties
Autorzy:: Orłowicz, A. W.
Mróz, M.
Tupaj, M.
Trytek, A.
Powiązania:: https://bibliotekanauki.pl/articles/381241.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: cast iron
automobile cylinder
service properties
żeliwo
cylinder samochodowy
właściwości użytkowe
Opis:: The paper presents an analysis of factors affecting the wear of cylinder liners. The effect of the graphite precipitation morphology on the cylinder liner wear mechanism is presented. Materials used to cast cylinder liners mounted in a number of engines have been examined for their conformity with requirements set out in applicable Polish industrial standard. A casting for a prototype cylinder liner has been made with a microstructure guaranteeing good service properties of the part.
Źródło:: Archives of Foundry Engineering; 2015, 15, 2; 79-84
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 18.

Tytuł:: The Effect of Refining and the Cooling Rate on Microstructure and Mechanical Properties of AlSi7Mg Alloy
Autorzy:: Tupaj, M.
Orłowicz, A. W.
Mróz, M.
Trytek, A.
Powiązania:: https://bibliotekanauki.pl/articles/381386.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: AlSi7Mg alloy
material compactness
microstructure parameter
mechanical properties
stop AlSi7Mg
zwięzłość materiału
właściwości mechaniczne
Opis:: The paper presents results of research on the effect of conventional refining with hexachloroethane and the cooling rate v_cool. ranging within the solidification temperature regime from 12.5°C/min to 94.5°C/min on compactness of the material, values of microstructure parameters λ_2D, λ_E, l_maxSi, and mechanical properties R_m, R_0,2, A₅ of unmodified AlSi7Mg alloy after heat treatment (solution treatment 540°C/6 h/water 20°C and aging 175°C/8 h/air). It has been found that as a result of refining and increased cooling rate, an improvement of material compactness occurred (reduction of the density index by 0.4%) accompanied by a decrease of values of parameters characterizing the microstructure: λ_2D by 54.4 μm; λ_E by 4,6 μm; and l_maxSi by 50 μm. As a result of these changes, the value of R_m increased by about 40 MPa and R_0.2 improved by about 36 MPa, while the value of A₅ decreased by 1.3%.
Źródło:: Archives of Foundry Engineering; 2015, 15, 3 spec.; 83-86
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 19.

Tytuł:: Materials Properties of Iron-rich Intermetallic Phase in a Multicomponent Aluminium-Silicon Alloy
Autorzy:: Tupaj, M.
Orłowicz, A. W.
Mróz, M.
Trytek, A.
Powiązania:: https://bibliotekanauki.pl/articles/381828.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: alloys Al-Si
intermetallics phase
Fe-rich
primary crystals
silicon
stopy Al-Si
faza międzymetaliczna
wzbogacanie żelazem
kryształy pierwotne
krzem
Opis:: Available technical literature includes a number of reports on harmful effects connected with elevated content of iron in aluminium-silicon alloys but in case of pressure castings, alloys containing up to 2% Fe can be used. This follows from lesser susceptibility of such alloys to sticking to surfaces of metal moulds. One effect of iron presence in aluminium-silicon alloys is precipitation of iron-rich intermetallic phases. In the study reported in this paper it has been found that in a multicomponent aluminium-silicon alloy, the indentation hardness (HIT) and the elastic indentation modulus (EIT) of intermetallic phases occurring in the form of polyhedrons and/or their conglomerates, rich in aluminium, iron, silicon, manganese, and chromium, containing also copper, nickel, and vanadium, are higher than those measured for silicon crystals. This feature can be used to intentional modelling microstructure of mechanical parts which are expected to show high resistance to abrasive wear.
Źródło:: Archives of Foundry Engineering; 2015, 15, 1 spec.; 111-114
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 20.

Tytuł:: The Effect of Cooling Rate on Properties of Intermetallic Phase in a Complex Al-Si Alloy
Autorzy:: Tupaj, M.
Orłowicz, A. W.
Mróz, M.
Trytek, A.
Markowska, O.
Powiązania:: https://bibliotekanauki.pl/articles/380384.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: alloy Al-Si
intermetallic phase
cooling rate
silicon crystals
stop Al-Si
faza międzymetaliczna
szybkość chłodzenia
kryształy krzemu
Opis:: The cooling rate is one of the main tools available to the process engineer by means of which it is possible to influence the crystallisation process. Imposing a desired microstructure on a casting as early as in the casting solidification phase widens significantly the scope of technological options at disposal in the process of aluminium-silicon alloy parts design and application. By changing the cooling rate it is possible to influence the course of the crystallisation process and thus also the material properties of individual microstructure components. In the study reported in this paper it has been found that the increase of cooling rate within the range of solidification temperatures of a complex aluminium-silicon alloy resulted in a decrease of values of the instrumented indentation hardness (HIT) and the instrumented indentation elastic modulus (EIT) characterising the intermetallic phase occurring in the form of polygons, rich in aluminium, iron, silicon, manganese, and chromium, containing also copper, nickel, and vanadium. Increased cooling rate resulted in supersaturation of the matrix with alloying elements.
Źródło:: Archives of Foundry Engineering; 2016, 16, 3; 125-128
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 21.

Tytuł:: Usable Properties of AlSi7Mg Alloy after Sodium or Strontium Modification
Autorzy:: Tupaj, M.
Orłowicz, A. W.
Mróz, M.
Trytek, M.
Markowska, O.
Powiązania:: https://bibliotekanauki.pl/articles/381773.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: alloy AlSi7Mg
refining
modification
cooling rate
microstructural parameters
usable properties
stop AlSi7Mg
rafinacja
modyfikacja
szybkość chłodzenia
parametry mikrostruktury
właściwości użytkowe
Opis:: The paper deals with the effect of microstructure diversified by means of variable cooling rate on service properties of AlSi7Mg cast alloy refined traditionally with Dursalit EG 281, grain refining with titanium-boron and modified with sodium and a variant of the same alloy barbotage-refined with argon and simultaneously grain refining with titanium-boron and modified with strontium. For both alloy variants, the castings were subject to T6 thermal treatment (solution heat treatment and artificial aging). It turned out that AlSi7Mg alloy after simultaneous barbotage refining with argon and grain refining with titanium-boron and modified with strontium was characterised with lower values of representative microstructure parameters (SDAS – secondary dendrite arm spacing, λE, lmax) and lower value of the porosity ratio compared to the alloy refined traditionally with Dursalit EG 281 and grain refining with titanium-boron and modified with sodium. The higher values of mechanical properties and fatigue strength parameters were obtained for the alloy simultaneously barbotage-refined with argon and grain refining with titanium-boron and modified with strontium.
Źródło:: Archives of Foundry Engineering; 2016, 16, 3; 129-132
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 22.

Tytuł:: Ductile Cast Iron Microstructure Adjustment by Means of Heat Treatment
Autorzy:: Mróz, M.
Orłowicz, A. W.
Tupaj, M.
Kupiec, B.
Kawiński, M.
Powiązania:: https://bibliotekanauki.pl/articles/947626.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: ductile cast iron
heat treatment
microstructure
żeliwo sferoidalne
obróbka cieplna
mikrostruktura
Opis:: The study presented in this paper concerned the possibility to apply a heat treatment process to ductile cast-iron thin-walled castings in order to remove excessive quantities of pearlite and eutectic cementite precipitates and thus meet the customer’s requirements. After determining the rates of heating a casting up to and cooling down from 900°C feasible in the used production heat treatment furnace (vh = 300°C/h and vc = 200°C/h, respectively), dilatometric tests were carried out to evaluate temperatures Tgr, TAc1start, TAc1end, TAr1start, and TAr1end. The newly acquired knowledge was the base on which conditions for a single-step ferritizing heat treatment securing disintegration of pearlite were developed as well as those of a two-step ferritization process guaranteeing complete disintegration of cementite and arriving at the required ferrite and pearlite content. A purely ferritic matrix and hardness of 119 HB was secured by the treatment scheme: 920°C for 2 hours / vc = 60°C/h / 720°C for 4 hours. A matrix containing 20–45% of pearlite and hardness of 180–182 HB was obtained by applying: 920°C for 2 hours or 4 hours / vc = 200°C/h to 650°C / ambient air.
Źródło:: Archives of Foundry Engineering; 2020, 20, 3; 37-40
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 23.

Tytuł:: On Degradation of Cast Iron Surface - Protective Paint Coat Joint
Autorzy:: Tupaj, M.
Orłowicz, A. W.
Mróz, A.
Bąk, G.
Abram, T.
Powiązania:: https://bibliotekanauki.pl/articles/381862.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: thin-wall casting
flake graphite
grey cast iron
corrosion
protective paint coat
odlewy cienkościenne
grafit
żeliwo szare
korozja
powłoka ochronna
Opis:: The paper is a presentation of a study on issues concerning degradation of protective paint coat having an adverse impact on aesthetic qualities of thin-walled cast-iron castings fabricated in furan resin sand. Microscopic examination and microanalyses of chemistry indicated that under the coat of paint covering the surface of a thin-walled casting, layers of oxides could be found presence of which can be most probably attributed to careless cleaning of the casting surface before the paint application process, as well as corrosion pits evidencing existence of damp residues under the paint layers contributing to creation of corrosion micro-cells.
Źródło:: Archives of Foundry Engineering; 2016, 16, 3; 133-136
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 24.

Tytuł:: Coefficient of Friction of a Brake Disc-Brake Pad Friction Couple
Autorzy:: Orłowicz, A. W.
Mróz, M.
Wnuk, G.
Markowska, O.
Homik, W.
Kolbusz, B,
Powiązania:: https://bibliotekanauki.pl/articles/380628.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: flake graphite
cast iron
brake discs
abrasive wear resistance
friction coefficient
grafit płatkowy
żeliwo
tarcza hamulcowa
odporność na ścierania
współczynnik tarcia
Opis:: The paper concerns evaluation of the coefficient of friction characterising a friction couple comprising a commercial brake disc cast of flake graphite grey iron and a typical brake pad for passenger motor car. For the applied interaction conditions, the brake pressure of 0.53 MPa and the linear velocity measured on the pad-disc trace axis equalling 15 km/h, evolution of the friction coefficient μ values were observed. It turned out that after a period of 50 minutes, temperature reached the value 270°C and got stabilised. After this time interval, the friction coefficient value also got stabilised on the level of μ = 0.38. In case of a block in its original state, stabilisation of the friction coefficient value occurred after a stage in the course of which a continuous growth of its value was observed up to the level μ = 0.41 and then a decrease to the value μ = 0.38. It can be assumed that occurrence of this stage was an effect of an initial running-in of the friction couple. In consecutive abrasion tests on the same friction couple, the friction coefficient value stabilisation occurred after the stage of a steady increase of its value. It can be stated that the stage corresponded to a secondary running-in of the friction couple. The observed stages lasted for similar periods of time and ended with reaching the stabile level of temperature of the disc-pad contact surface.
Źródło:: Archives of Foundry Engineering; 2016, 16, 4; 196-200
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 25.

Tytuł:: Improvement of Resistance of Cast-iron Heat Exchangers to High-temperature Corrosion
Autorzy:: Orłowicz, A. W.
Tupaj, M.
Trytek, A.
Mróz, M.
Radoń, M.
Jacek, M.
Powiązania:: https://bibliotekanauki.pl/articles/383068.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: heat exchangers
metallic coating
resistance to corrosion
high-temperature corrosion
wymienniki ciepła
powłoka metaliczna
odporność na korozję
korozja wysokotemperaturowa
Opis:: The paper discusses the possibility of improving resistance of heat exchangers made of gray cast iron with flake graphite to high-temperature corrosion by providing them with metallic coatings. A metallic coating containing 76.9% Ni, 19.8% Cr, 1.7% Si, 0.9% Fe, and 0.9% Mn was applied by means of the plasma spraying method and subjected to cyclically variable thermal loads in the atmosphere of solid fuels combustion products (oxygen, sulfur, chlorine, and sodium). In a 30-day thermal load test held at temperature 500°C it has been found that thickness of the metallic coating decreased from the initial (240 ± 6) μm to (231 ± 6) μm. The depth to which sulfur, chlorine, and sodium penetrated the coating was about 30 μm. Increased oxygen content occurred along the whole coating depth. In the coating area adjacent to the substrate surface, the content was twice as high compared to this observed in the initial coating material. Although presence of oxygen was found within the whole depth of the coating, i.e. (231 ± 6) μm, no signs of susceptibility of the sprayed metallic layer to separation from substrate of gray cast iron with flake graphite were found.
Źródło:: Archives of Foundry Engineering; 2018, 18, 3; 49-52
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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