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Wyszukujesz frazę "Żak, J. M." wg kryterium: Autor


Tytuł:
Analiza i ocena wielokryterialna wybranych, innowacyjnych rozwiązań transportowych wobec potrzeb osób z niepełnosprawnością i starszych
Analysis and multiple-criteria evaluation of selected, innovative transportation solutions in view of the needs of disabled and elderly people
Autorzy:
Kruszyński, M.
Żak, J.
Powiązania:
https://bibliotekanauki.pl/articles/202582.pdf
Data publikacji:
2017
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
ograniczona mobilność
innowacyjne rozwiązania transportowe
analiza wielokryterialna
reduced mobility
innovative transportation solutions
multiple-criteria analysis
Opis:
W niniejszym artykule autorzy zaprezentowali wybrane, innowacyjne rozwiązania transportowe dla systemu transportu miejskiego i dokonali ich wielokryterialnej oceny z uwzględnieniem analizy potrzeb osób z niepełnosprawnością i starszych (w zaawansowanym wieku). Przedstawili takie nowoczesne rozwiązania transportowe jak: system personal rapid transit (PRT), system bus rapid transit (BRT), czy zintegrowany węzeł przesiadkowy. Wymienione rozwiązania zastosowali do zaprojektowania różnych wariantów systemu transportu miejskiego i poddali je ocenie wielokryterialnej z uwzględnieniem interesów (preferencji i oczekiwań) osób o ograniczonej mobilności. W artykule zaprezentowano wyniki komputerowych eksperymentów obliczeniowych z wykorzystaniem metody AHP. Na podstawie uzyskanego rankingu końcowego przeprowadzono odpowiednie wnioskowanie.
In this paper the authors have presented selected, innovative transportation solutions for the urban transportation system and have conducted a multiple-criteria evaluation of them, taking into consideration the analysis of the needs of disabled and elderly (in advanced age) people. They have presented modern transportation solutions, such as: Personal Rapid Transit (PRT) system, Bus Rapid Transit (BRT) system and integrated transfer nodes. They have used the above mentioned solutions to design different variants of an urban transportation system and have carried out their multiple-criteria evaluation taking into consideration the interests (preferences and expectations) of people with reduced mobility. In this paper the results of the computer based computational experiments, carried out using the AHP method have been presented. On the basis of the final ranking of considered variants, the appropriate reasoning has been conducted.
Źródło:
Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie; 2017, 75; 141-162
0239-9415
Pojawia się w:
Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Microstructure, Properties and Machinability of Al-Cu-Si Alloys
Autorzy:
Kozana, J.
Piękoś, M.
Maj, M.
Garbacz-Klempka, A.
Żak, P. L.
Powiązania:
https://bibliotekanauki.pl/articles/1840820.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
casting of non-ferrous metals
aluminum alloys
ternary Al-Cu-Si alloy
mechanical properties
microstructure
thermo-calc
odlewanie metali nieżelaznych
stopy aluminium
stop trójskładnikowy Al-Cu-Si
właściwości mechaniczne
mikrostruktura
Opis:
As part of the studies conducted in the field of broadly understood casting of non-ferrous metals, selected results on the impact of variable additions of copper and silicon in aluminium were presented. A series of melts was carried out with copper content kept constant at a level of 2% (1st stage) and 4% (2nd stage) and variable contents of silicon introduced into aluminium. The crystallization characteristics of the examined alloys and the percentage of structural constituents at ambient temperature were obtained by modelling the thermodynamic parameters of individual phases with the CALPHAD method. The microstructure of the obtained alloys was examined and microhardness was measured by the Vickers-Hanemann method. The alloy properties were assessed based on the results of mechanical tests, including ultimate tensile strength (UTS), hardness (BHN) and elongation (E). The machinability of the tested alloys was analyzed in a machinability test carried out by the Keep-Bauer method, which consisted in drilling with a constant feed force. The obtained results clearly indicate changes in the images of microstructure, such as the reduction in grain size, solution hardening and precipitation hardening. The changes in the microstructure are also reflected in the results of mechanical properties testing, causing an increase in strength and hardness, and plasticity variations in the range of 4 ÷ 16%, mainly due to the introduced additions of copper and silicon. The process of alloy strengthening is also visible in the results of machinability tests. The plotted curves showing the depth of the hole as a function of time and the images of chips produced during the test indicate an improvement in the wear resistance obtained for the tested group of aluminium alloys with the additions of copper and silicon.
Źródło:
Archives of Foundry Engineering; 2020, 20, 4; 145-153
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania możliwości otworowania z wykorzystaniem ładunków kumulacyjnych
Research on a possibility to conduct punching with a use of shaped charges
Autorzy:
Burian, W.
Magier, M.
Rotkegel, M.
Sobala, J.
Szymała, J.
Żak, A.
Powiązania:
https://bibliotekanauki.pl/articles/167392.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Górnictwa
Tematy:
ładunki kumulacyjne
otworowanie
urabianie
shaped charges
punching
mining
Opis:
W artykule przedstawiono przebieg i wyniki badań penetracji betonu przez ładunki kumulacyjne stosowane w przemyśle zbrojeniowym. Badania te stanowią pierwszy etap prac badawczych prowadzonych w kierunku rozpoznania możliwości stosowania ładunków kumulacyjnych do otworowania skał. Badania prowadzono na poligonie Wojskowego Instytutu Technicznego Uzbrojenia z wykorzystaniem amunicji czołgowej. Prezentowane w artykule badania i wyniki pozwalają wnioskować o możliwości stosowania ładunków kumulacyjnych do otworowania skał w przemyśle wydobywczym.
This paper presents the course and results of concrete penetration tests conducted with shaped charges used in the arms industry. These tests are the first stage of research focused on the possible use of shaped charges for rock punching. The study was conducted at the training ground of the Military Institute of Armament Technology with the use of tank ammunition. The tests and results presented in the paper allow to conclude that there is a possibility to use shaped charges for rock punching in the mining industry.
Źródło:
Przegląd Górniczy; 2016, 72, 7; 20-25
0033-216X
Pojawia się w:
Przegląd Górniczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer Simulation of the Formation of Non-Metallic Precipitates During a Continuous Casting of Steel
Autorzy:
Kalisz, D.
Żak, P. L.
Tokarski, T.
Wzorek, Ł.
Suchy, J. S.
Kiczor, M.
Cieślak, W.
Powiązania:
https://bibliotekanauki.pl/articles/958226.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
non-metallic oxide precipitates
modelling
continuous casting of steel
crystallization
Opis:
The authors own computer software, based on the Ueshima mathematical model with taking into account the back diffusion, determined from the Wołczyński equation, was developed for simulation calculations. The applied calculation procedure allowed to determine the chemical composition of the non-metallic phase in steel deoxidised by means of Mn, Si and Al, at the given cooling rate. The calculation results were confirmed by the analysis of samples taken from the determined areas of the cast ingot. This indicates that the developed computer software can be applied for designing the steel casting process of the strictly determined chemical composition and for obtaining the required non-metallic precipitates.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 335-340
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cytotoxic surfaces for regional chemotherapy
Autorzy:
Krukiewicz, K.
Cichy, M.
Turczyn, R.
Jarosz, T.
Zak, J. K.
Bednarczyk-Cwynar, B.
Ruszkowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/285824.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
chemotherapy
surfaces
cytotoxicity
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 78
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decision making strategies for warehouse operations
Autorzy:
Kłodawski, M.
Lewczuk, K.
Jacyna-Gołda, I.
Żak, J.
Powiązania:
https://bibliotekanauki.pl/articles/224012.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
warehousing
warehouse strategy
modelling
decision making
składowanie
strategia magazynowania
modelowanie
podejmowanie decyzji
Opis:
The paper presents issues related to design and organization of warehouse processes. Draws attention to problems of modelling logistics facilities and processes occurring in them. Paper also points out the essence of correct operation of warehouses and associated with this risks for supply chain. Warehouse processes have been properly defined and divided into smaller components, like: phases of process, activities, sets of procedures, procedures or working movements. Paper presents various possible configurations of warehouse processes, which were named as warehouse strategies. Warehouse process strategy is a part of warehousing. It determines the sequence of warehouse operations. These operations are related to internal transport, cargo form transformation and cargo buffering. In paper it is noted that the warehouse strategy depends on the several technical and organizational factors and is associated with a certain probability. This probability can be estimated based on data analysis concerning logistics processes in the specified warehouse facility. As shown in case study, appropriate selection of warehouse strategies determines possibility of fulfilling customer order in time and costs that are acceptable for him.
Źródło:
Archives of Transport; 2017, 41, 1; 43-53
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficiency as an assessment measure of warehouse facilities location in logistics network
Autorzy:
Jacyna-Gołda, I.
Żak, J.
Wasiak, M.
Powiązania:
https://bibliotekanauki.pl/articles/247767.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
efficiency
logistics network
location
Opis:
The paper presents an approach to the assessment of the location of facilities in the warehouse logistics network with the efficiency of its operations. Determination of efficiency of complex systems of this type should take into account wide range of issues. The system efficiency results on the one hand from the efficiency of its action and on the other hand from the ability to use available system elements to achieve the objectives. Efficiency is a main criterion to the evaluation of the activity both at the level of the whole system, as well as in its subsystems or components. Most often, it refers to the principle of rational management formulated in two variants: performance (maximization effect) and economical (minimizing effort). The article poses the thesis that based on studies of speed and reliability of execution of tasks it is possible to assess the potential locations of warehouse facilities in the studied logistics network. Were also presented factors affecting the efficiency of the functioning of individual cells of the logistics network. Was pointed to the technical, economic, organizational and reliability aspects affecting the efficiency and reliability of the logistics network in terms of both supply and distribution. It was also presented a modular block diagram of an assessment method for localizing logistics facilities in the logistics network.
Źródło:
Journal of KONES; 2015, 22, 3; 59-66
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of height changes of GNSS stations from the solutions of short vectors and PSI measurements
Autorzy:
Krynski, J.
Zak, L.
Ziolkowski, D.
Cisak, J.
Lagiewska, M.
Powiązania:
https://bibliotekanauki.pl/articles/145302.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
height changes
GNSS
Persistent Scatterer Interferometry
radar satelitarny
deformacja powierzchni
Opis:
Time series of weekly and daily solutions for coordinates of permanent GNSS stations may indicate local deformations in Earth’s crust or local seasonal changes in the atmosphere and hydrosphere. The errors of the determined changes are relatively large, frequently at the level of the signal. Satellite radar interferometry and especially Persistent Scatterer Interferometry (PSI) is a method of a very high accuracy. Its weakness is a relative nature of measurements as well as accumulation of errors which may occur in the case of PSI processing of large areas. It is thus beneficial to confront the results of PSI measurements with those from other techniques, such as GNSS and precise levelling. PSI and GNSS results were jointly processed recreating the history of surface deformation of the area of Warsaw metropolitan with the use of radar images from Envisat and Cosmo-SkyMed satellites. GNSS data from Borowa Gora and Jozefoslaw observatories as well as from WAT1 and CBKA permanent GNSS stations were used to validate the obtained results. Observations from 2000–2015 were processed with the Bernese v.5.0 software. Relative height changes between the GNSS stations were determined from GNSS data and relative height changes between the persistent scatterers located on the objects with GNSS stations were determined from the interferometric results. The consistency of results of the two methods was 3 to 4 times better than the theoretical accuracy of each. The joint use of both methods allows to extract a very small height change below the level of measurement error.
Źródło:
Geodesy and Cartography; 2017, 66, 1; 73-88
2080-6736
2300-2581
Pojawia się w:
Geodesy and Cartography
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exhaust emission measurements in the development of sustainable road transport
Autorzy:
Merkisz, J.
Merkisz-Guranowska, A.
Pielecha, J.
Nowak, M.
Jacyna, M.
Lewczuk, K.
Żak, J.
Powiązania:
https://bibliotekanauki.pl/articles/244259.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
exhaust emission
noise emission
real road conditions
sustainable transport
health protection
Opis:
Economic development of nations leads to a higher living comfort of the society. Rich societies want to move safely and independently and demand immediate availability of purchased goods or – in the case of Internet shopping – delivery in the shortest possible time. Such an approach facilitates a continuous growth in the number of road vehicles. At the current level of technology advancement, an increasing number of vehicles results in a growth of the consumption of fossil fuels, which entails increased exhaust emissions and that, in turn, has a negative impact on the health of the living organisms. Another negative consequence of an increased number of vehicles (increased road congestion) is the emission of noise. This problem is particularly significant in large agglomerations where people are surrounded by moving vehicles. This paper presents the extent of influence of the automotive industry on the natural environment and the extent of changes in vehicle design and organization of road infrastructure that were instituted to reduce the transport’s environmental burden. The further part of the paper presents a definition of the development of sustainable transport, its advantages and hurdles that we may encounter when modernizing a transport system. Subsequently in the paper, the measurements under actual vehicle operating conditions were described together with the possibilities of analysis of the research results and the advantages resulting from such an approach during the assessment of the impact of the automotive industry on the natural environment.
Źródło:
Journal of KONES; 2013, 20, 4; 277-284
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extended free surface flow model based on the lattice Boltzmann approach
Rozszerzony model przepływów z powierzchnią swobodną oparty na metodzie siatkowej Boltzmanna
Autorzy:
Szucki, M.
Suchy, J. S.
Żak, P.
Lelito, J.
Gracz, B.
Powiązania:
https://bibliotekanauki.pl/articles/264039.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
modelowanie komputerowe
metoda siatkowa Boltzmanna
LBM
przepływy dwufazowe
numerical modeling
lattice Boltzmann method
two-phase flows
Opis:
The aim of this work was to extend numerical model of mould filling phenomena previously presented in [3]. Authors described some techniques for modeling single phase and free surface flows. Method, called "piston model", for modeling influence of liquid flow on gas behavior inside the mould and also, effect of local gas pressure on movement of metal free surface, was shown. In last part of this work, results from presented model were compared with data from the commercial simulation environment FLOW-3D.
Celem pracy było rozbudowanie numerycznego modelu procesu zalewania formy odlewniczej o możliwość określenia pola prędkości i lokalnego ciśnienia w podobszarze formy wypełnionym przez fazę gazową. Autorzy przedstawili pokrótce techniki, oparte na metodzie siatkowej Boltzmanna, pozwalające na modelowanie przepływów jednofazowych i przepływów z powierzchnią swobodną. Zaproponowano również rozwiązanie, nazwane w niniejszej pracy "modelem tłoka", umożliwiające zarówno modelowanie wpływu ruchu fazy ciekłej na charakter i kinetykę przepływów w fazie gazowej, jak i uwzględnienie oddziaływania lokalnego ciśnienia gazu na przemieszczanie się powierzchni swobodnej metalu. W końcowej części pracy skonfrontowano wyniki uzyskane przy wykorzystaniu zaproponowanego modelu z danymi otrzymanymi w komercyjnym programie symulacyjnym FLOW-3D.
Źródło:
Metallurgy and Foundry Engineering; 2010, 36, 2; 113-121
1230-2325
2300-8377
Pojawia się w:
Metallurgy and Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Ti and Fe on the Microstructure and Properties of Copper and Copper Alloys
Autorzy:
Piękoś, M.
Garbacz-Klempka, A.
Kozana, J.
Żak, P. L.
Powiązania:
https://bibliotekanauki.pl/articles/1840892.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
copper alloys
thermodynamic modelling
alloying additions
titanium
mechanical properties
microstructure
stopy miedzi
modelowanie termodynamiczne
dodatki stopowe
tytan
właściwości mechaniczne
mikrostruktura
Opis:
The paper discusses issues related to the technology of melting and processing of copper alloys. An assessment was made of the impact of titanium and iron introduced in the form of pre-alloy - Ti73Fe master alloy on the microstructure and selected properties of pure copper and copper-silicon alloy. There are known examples of the use of titanium and iron additive to the copper alloy. Titanium as an additive introduced to copper alloys to improve their properties is sometimes also applicable. In the first stage of the study, a series of experimental castings were conducted with variable content of Ti73Fe master alloy entering copper in quantities of 5 %, 15 %, 25 % in relation to the mass of the metal charge. In the second stage, a silicon additive was introduced into copper in the amount of about 4 % by weight and 0.5 % and 1 % respectively of the initial Ti73Fe alloy. Thermodynamic phase parameters were modelled using CALPHAD method and Thermo-Calc software, thus obtaining the crystallization characteristics of the test alloys and the percentage of structural components at ambient temperature. Experiments confirmed the validity of the use of Ti73Fe master alloy as an additive. The pre-alloy used showed a favourable performance, both in terms of addition solubility and in the area of improvement of strength properties. Changes were achieved in the microstructure, mainly within the grain, but also in the developed dendrites of the solid solution. Changes occur with the introduction of titanium with iron into copper as well as to two-component silicon bronze.
Źródło:
Archives of Foundry Engineering; 2020, 20, 4; 83-90
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Log-Normal Distribution of Heterogeneous Nucleation Substrate in the AZ91/SiCp Composite
Autorzy:
Gracz, B.
Żak, P. L.
Szucki, M.
Lelito, J.
Powiązania:
https://bibliotekanauki.pl/articles/379492.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
AZ91/SiCp composite
heterogeneous nucleation
log-normal distribution
substrate distribution
kompozyt AZ91/SiCp
zarodkowanie heterogeniczne
rozkład log-normalny
rozkład podłoża
Opis:
The aim in this work is to develop a log-normal distribution of heterogeneous nucleation substrates for the composite based on AZ91 alloy reinforced by SiC particles. The computational algorithm allowing the restore of the nucleation substrates distribution was used. The experiment was performed for the AZ91 alloy containing 4%wt. of SiC particles. Obtained from experiment, the grains density of magnesium primary phase and supercooling were used to algorithm as input data.
Źródło:
Archives of Foundry Engineering; 2013, 13, 3 spec.; 35-38
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Interactions between Nanoparticles Formed during Calcination of Ferrihydrite
Autorzy:
Schneeweiss, O.
David, B.
Žák, T.
Filip, J.
Tuček, J.
Zbořil, R.
Mašláň, M.
Powiązania:
https://bibliotekanauki.pl/articles/1506995.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.20.Ck
75.20.En
Opis:
Magnetic interactions between nanoparticles of magnetite $Fe_3O_4$ and α-Fe formed during calcination of ferrihydrite in $H_2$ at temperatures 533 ÷ 713 K were studied. The detailed phase analysis describes evolution of contents of magnetite and α-Fe. Explanation of an anomalous course of magnetic moment characterized by a local maximum at an early stage of formation of nanoparticles is discussed.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 749-750
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model of dendrite growth in metallic alloys
Model wzrostu dendrytu w stopach
Autorzy:
Żak, P.
Lelito, J.
Krajewski, W. K.
Suchy, J.S.
Gracz, B.
Szucki, M.
Powiązania:
https://bibliotekanauki.pl/articles/264065.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
modelowanie
krystalizacja
wzrost dendrytu
model swobodnego wzrostu
modelling
crystallization
dendrite growth
free growth model
Opis:
The aim of this study was to develop a model of dendrite growth. The model should emphasis on solute depletion around dendrite tip and its influence on dendrite growth rate. Prepared model can be used to predict dendrite growth rate in metallic alloy. It was assumed that dendrite while growing occupy a spherical envelope with radius R that consists of solid dendrite and interdendritic melt enclosed by dendrite arms. Set of differential equations that built the model can be solved with numerical methods. The solution allows determination of dendrite growth rate and alloy component distribution in the liquid adjected to the dendrite and inside the solid dendrite.
Artykuł przedstawia wyniki pracy, której celem było opracowanie modelu wzrostu dendrytu ze szczególnym uwzględnieniem wpływu rozkładu stężeń pierwiastka stopowego wokół czoła dendrytu oraz jego wpływu na szybkość wzrostu dendrytu. Przygotowany model może zostać zastosowany do przewidywania szybkości wzrostu dendrytu w wieloskładnikowym stopie. Założone zostało, że dendryt wzrastając, ogranicza pewną objętość sferyczną o promieniu R, która składa się z jego ramion oraz cieczy zamkniętej między nimi. Przygotowany układ równań różniczkowych jest gotowy do rozwiązania przy pomocy metod numerycznych. Rozwiązanie umożliwia określenie szybkości wzrostu dendrytu oraz rozkładu składnika stopowego w otaczającej go cieczy oraz w dendrycie, na kierunku wyznaczonym przez jego środek oraz wierzchołek.
Źródło:
Metallurgy and Foundry Engineering; 2010, 36, 2; 131-136
1230-2325
2300-8377
Pojawia się w:
Metallurgy and Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling and Simulation of the Magnesium Primary Phase Crystallization in the AZ91/SiCp Composite Dependent on Mass Fraction of SiCp
Autorzy:
Lelito, J.
Krawiec, H.
Vignal, V.
Gracz, B.
Żak, P. L.
Szucki, M.
Powiązania:
https://bibliotekanauki.pl/articles/356885.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
numerical simulation
AZ91/SiCp composite
micro-model
Opis:
The aim of this work is to develop a numerical model capable of predicting the grain density in the Mg-based matrix phase of an AZ91/SiC composite, as a function of the total mass fraction of the embedded SiC particles. Based on earlier work in a range of alloy systems, we assume an exponential relationship between the grain density and the maximum supercooling during solidification. Analysis of data from cast samples with different thicknesses, and mass fractions of added SiCp, permits conclusions to be drawn on the role of SiCp in increasing grain density. By fitting the data, an empirical nucleation law is derived that can be used in a micro model. Numerical simulation based on the model can predict the grain density of magnesium alloys containing SiC particles, using the mass fraction of the particles as inputs. These predictions are compared with measured data.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 1; 29-32
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł

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