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    Tytuł:
    Supporting the Manufacturing Process of Metal Products with the Methods of Artificial Intelligence
    Autorzy:
    Wilk-Kołodziejczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/355822.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    manufacturing process of metal products
    decision algorithms
    implementation of IT solutions
    Opis:
    The aim of this research programme was to develop a series of methods and solutions to support the decision-making process in foundry and materials engineering. The specific problems discussed included the selection of methods for data processing and knowledge representation formalisms, backed up by the creation of decision algorithms based on contemporary achievements of artificial intelligence, tailored to the needs of foundry industry and metallurgy. The manufacturing process of metal items is associated with many aspects, which affect the quality of end product. For process engineers responsible for the supervising and planning of production, an important feature is, among others, the diversified nature of numerous aspects of the knowledge acquisition and integration from distributed sources of information which, when made available in an appropriate manner, can support the improvement of manufacturing process.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 4; 1995-1998
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reasoning algorithm for a creative decision support system integrating inference and machine learning
    Autorzy:
    Wilk-Kolodziejczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/305355.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    reasoning algorithm
    inferential theory of learning
    decision support
    rule induction
    logic of plausible reasoning
    Opis:
    In this paper a reasoning algorithm for a creative decision support system is proposed. It allows to integrate inference and machine learning algorithms. Execution of learning algorithm is automatic because it is formalized as aplying a complex inference rule, which generates intrinsically new knowledge using the facts stored already in the knowledge base as training data. This new knowledge may be used in the same inference chain to derive a decision. Such a solution makes the reasoning process more creative and allows to continue resoning in cases when the knowledge base does not have appropriate knowledge explicit encoded. In the paper appropriate knowledge representation and infeence model are proposed. Experimental verification is performed on a decision support system in a casting domain.
    Źródło:
    Computer Science; 2017, 18 (3); 317-338
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Decision Support System in the Domain of Casting Defects Diagnosis
    Autorzy:
    Wilk-Kołodziejczyk, D.
    Rojek, G.
    Regulski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/947573.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    application of information technology
    foundry industry
    castings defects
    diagnosis
    zastosowanie technologii informatycznych
    przemysł odlewniczy
    wady odlewów
    Opis:
    This article presents a computer system for the identification of casting defects using the methodology of Case-Based Reasoning. The system is a decision support tool in the diagnosis of defects in castings and is designed for small and medium-sized plants, where it is not possible to take advantage of multi-criteria data. Without access to complete process data, the diagnosis of casting defects requires the use of methods which process the information based on the experience and observations of a technologist responsible for the inspection of ready castings. The problem, known and studied for a long time, was decided to be solved with a computer system using a CBR (Case-Based Reasoning) methodology. The CBR methodology not only allows using expert knowledge accumulated in the implementation phase, but also provides the system with an opportunity to "learn" by collecting new cases solved earlier by this system. The authors present a solution to the system of inference based on the accumulated cases, in which the main principle of operation is searching for similarities between the cases observed and cases stored in the knowledge base.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 3; 107-110
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methods of Computational Intelligence in the Context of Quality Assurance in Foundry Products
    Autorzy:
    Rojek, G.
    Regulski, K.
    Wilk-Kołodziejczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/380386.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    application of information technology
    foundry industry
    quality management
    casting defects
    computational intelligence
    artificial intelligence
    zastosowanie technologii informatycznych
    przemysł odlewniczy
    zarządzanie jakością
    wady odlewnicze
    inteligencja obliczeniowa
    sztuczna inteligencja
    Opis:
    One way to ensure the required technical characteristics of castings is the strict control of production parameters affecting the quality of the finished products. If the production process is improperly configured, the resulting defects in castings lead to huge losses. Therefore, from the point of view of economics, it is advisable to use the methods of computational intelligence in the field of quality assurance and adjustment of parameters of future production. At the same time, the development of knowledge in the field of metallurgy, aimed to raise the technical level and efficiency of the manufacture of foundry products, should be followed by the development of information systems to support production processes in order to improve their effectiveness and compliance with the increasingly more stringent requirements of ergonomics, occupational safety, environmental protection and quality. This article is a presentation of artificial intelligence methods used in practical applications related to quality assurance. The problem of control of the production process involves the use of tools such as the induction of decision trees, fuzzy logic, rough set theory, artificial neural networks or case-based reasoning.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 2; 11-16
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Domain WEB Monitoring
    Autorzy:
    Kluska-Nawarecka, S.
    Opaliński, A.
    Wilk-Kołodziejczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/381651.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    web monitoring
    foundry industry
    data integration
    monitoring Internetu
    przemysł odlewniczy
    integracja danych
    Opis:
    The last few years have seen a very dynamic development of the Internet worldwide. This is related to the rapid growth of the amount of information stored in its resources. The vast amount of data, impossible to be analyzed by man, is the reason why finding and selecting valuable information from a large number of results returned by search engines has recently become the task very difficult. Another problem is the low quality of the data contained in a large part of the results returned by search engines. This situation poses serious problems if one searches for detailed information related to the specific area of industry or science. In addition, the lack of effective solutions, allowing for continuous monitoring of WEB in terms of the search for emerging information while maintaining the high quality of the returned results, only aggravates this situation. Due to this state of affairs, a solution highly welcome would be a system allowing for continuous monitoring of the WEB and searching for valuable information from the selected Internet resources. This paper describes a concept of such a system along with its initial implementation and application to search for information in the foundry industry. The results of a prototype implementation of this system were presented, and plans for its further development and adaptation to other sectors of the industry were outlined.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2 spec.; 43-46
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Supporting the Bronze CastingThrough Information Structuring Based on Ontology application
    Autorzy:
    Górny, Z.
    Wilk-Kołodziejczyk, D.
    Smolarek-Grzyb, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380272.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bronze casting
    casting defects
    decision support systems
    ontology
    odlewy z brązu
    wady odlewnicze
    systemy wspomagania decyzji
    Opis:
    A significant part of the knowledge used in the production processes is represented with natural language. Yet, the use of that knowledge in computer-assisted decision-making requires the application of appropriate formal and development tools. An interesting possibility is created by the use of an ontology that is understandable both for humans and for the computer. This paper presents a proposal for structuring the information about the foundry processes, based on the definition of ontology adapted to the physical structure of the ongoing technological operations that make up the process of producing castings.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1; 33-36
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heuristic models of the toughening process to improve the properties of non-ferrous metal alloys
    Heurystyczne modele procesu cieplnego ulepszania właściwości stopów metali kolorowych
    Autorzy:
    Górny, Z.
    Kluska-Nawarecka, S.
    Wilk-Kołodziejczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/355717.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    copper alloys
    knowledge model
    inference methods
    artificial intelligence
    heuristics
    stopy miedzi
    model wiedzy
    metody wnioskowania
    sztuczna inteligencja
    heurystyka
    Opis:
    The object of the conducted experimental studies was determination of the physical properties of the BA1044 alloy subjected to several types of toughening and modification under varying conditions. The aim of the experiments was to determine which of the above mentioned technological processes has greater impact on the value of the alloy parameters and how these treatments should be chosen to get the metal with the desired properties on a limited number of experiments.
    Przedmiotem prowadzonych badan eksperymentalnych było określenie właściwości fizycznych stopu BA1044 poddanego kilku rodzajom ulepszania cieplnego oraz przy różnych warunkach modyfikacji. Celem eksperymentu było określenie, które ze wspomnianych zabiegów technologicznych posiadają największy wpływ na wartości badanych parametrów metalu oraz w jaki sposób należy dobierać te działania aby uzyskać metal o pożądanych właściwościach przy ograniczonej liczbie eksperymentów.
    Źródło:
    Archives of Metallurgy and Materials; 2013, 58, 3; 849-852
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ chromu na proces krystalizacji, mikrostrukturę i właściwości siluminu podeutektycznego
    Effect of chromium on the crystallization process, microstructure and properties of hypoeutectic Al-Si alloy
    Autorzy:
    Szymczak, T.
    Gumienny, G.
    Wilk-Kolodziejczyk, D.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/391684.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
    Tematy:
    silumin
    chrom
    mikrostruktura
    właściwości mechaniczne
    odlewanie ciśnieniowe
    chromium
    microstructure
    mechanical properties
    high pressure die casting
    Opis:
    W pracy przedstawiono wyniki badań siluminu podeutektycznego z dodatkiem chromu przeznaczonego do odlewania pod ciśnieniem. W charakterze stopu wyjściowego zastosowano silumin o składzie chemicznym zbliżonym do siluminu gatunku EN AC-46000. W celu wprowadzenia chromu do siluminu wyjściowego zastosowano zaprawę AlCr15. Ilość siluminu wyjściowego oraz zaprawy AlCr15 dobrano w proporcjach pozwalających na uzyskanie w stopie zawartości Cr około 0,1; 0,2; 0,3; 0,4 i 0,5% wag. W ramach realizacji pracy zbadano zarówno silumin wyjściowy, jak również siluminy z dodatkiem chromu. Przedstawiono wyniki analizy termicznej i derywacyjnej ATD (ang. Differential Thermal Analysis – DTA), przeprowadzonej w celu zbadania procesu krystalizacji siluminów. Pokazano mikrostrukturę siluminów odlewanych do próbnika ATD oraz ciśnieniowo. Określono podstawowe właściwości mechaniczne siluminów odlewanych pod ciśnieniem. Przedstawione wyniki analizy ATD wykazały wpływ dodatku chromu na przebieg procesu krystalizacji badanego siluminu. Na krzywych ATD siluminu wyjściowego występują trzy efekty cieplne wywołane odpowiednio krystalizacją roztworu stałego α(Al), oraz dwóch eutektyk α + Al15(Fe,Mn)3Si2 + + β i α + Al2Cu + AlSiCuFeMnMgNi + β. Wprowadzenie chromu w ilości około 0,2% wag. spowodowało wystąpienie na krzywej derywacyjnej dodatkowego efektu cieplnego pochodzącego od krystalizacji fazy międzymetalicznej zawierającej chrom. Krystalizacja tej fazy zachodzi przed wydzielaniem się z cieczy dendrytów fazy α(Al). Analiza mikrostruktury siluminów odlewanych do próbnika ATD wykazała pojawienie się wydzieleń „nowej” fazy w siluminach zawierających 0,2% wag. lub więcej Cr. Wraz z pojawieniem się na krzywych ATD dodatkowego efektu cieplnego oraz „nowej” fazy w mikrostrukturze siluminu zauważono brak fazy Al15(Fe,Mn)3Si2. W siluminach odlewanych ciśnieniowo dodatek chromu również spowodował powstanie „nowej” fazy międzymetalicznej. Faza ta pojawia się przy zawartości około 0,3% wag. lub większej Cr. Ma ona morfologię zbliżoną do ścianowej. Wraz z podwyższaniem ilości chromu rozmiary tej fazy znacząco się zwiększają. Badania podstawowych właściwości mechanicznych siluminów odlewanych pod ciśnieniem wykazały, że dodatek Cr daje możliwość znaczącego podwyższenia głównie wytrzymałości na rozciąganie Rm i wydłużenia względnego A. Pierwiastek ten w mniejszym stopniu wpłynął na podwyższenie twardości HB. Wartości umownej granicy plastyczności Rp0,2 siluminu wyjściowego i siluminów z podwyższoną zawartością chromu nie zmieniają się istotnie. Najwyższe właściwości mechaniczne uzyskano dla siluminów zawierających około 0,2 i 0,3% wag. Cr.
    The paper presents the results of studies of hypoeutectic silumin with a chromium addition used for pressure casting. A silumin with the composition similar to that of EN AC-46000 was used as the initial one. In order to introduce chromium into the initial silumin, an AlCr15 master alloy was applied. The amounts of the initial silumin and the AlCr15 master alloy were selected in the proportions making it possible to obtain about 0.1; 0.2; 0.3; 0.4 and 0.5 wt. % of Cr in the alloy. Both the initial silumin and the silumins with the chromium addition were examined. The results of the thermal and derivational analysis performed to investigate the silumins' crystallization process have been presented. The microstructure of the silumins cast into an DTA tester and under pressure has been demonstrated. The basic mechanical properties of the pressure cast silumins have been presented. The results of the DTA analysis showed an effect of the chromium addition on the course of the crystallization process of the examined silumin. Three thermal effects are present on the silumin's DTA curves, caused by the crystallization of the solid solution α(Al), and of two eutectics α + Al15(Fe,Mn)3Si2 + β and α + Al2Cu + AlSiCuFeMnMgNi + + β. The introduction of chromium in the amount of about 0.2 wt. % caused the presence of an additional thermal effect on the derivation curve, originating from the crystallization of the intermetallic phase containing chromium. The crystallization of this phase occurs before the precipitation of the dendrites of phase α(Al) from the liquid. The microstructure analysis of the silumins cast into the DTA tester showed the presence of precipitations of a “new” phase in the silumins containing 0.2% wt. Cr or more. With the occurrence of an additional thermal effect on the DTA curves as well as the “new” phase in the silumin's microstructure, the lack of phase Al15(Fe,Mn)3Si2 was observed. In the pressure cast silumins, the chromium addition also caused the formation of a “new” intermetallic phase, which occurs with the Cr content of about 0.3 wt. % or more. Its morphology is similar to a faceted one. With an increase of the chromium content, the size of this phase significantly increases as well. The investigations of the basic mechanical properties of the pressure cast silumins showed that the Cr addition makes it possible to significantly increase mainly the tensile strength Rm and the unit elongation A. To a lesser extent, this element caused an increase of the hardness HB. The values of the proof stress Rp0.2 of the initial silumin and the silumins with an increased chromium content do not change significantly. The highest mechanical properties were obtained for the silumins containing about 0.2 and 0.3 wt. % Cr.
    Źródło:
    Prace Instytutu Odlewnictwa; 2018, 58, 1; 55-72
    1899-2439
    Pojawia się w:
    Prace Instytutu Odlewnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of an Approximation Model of Selected Properties of Model Materials Used for Simulations of Bulk Metal Plastic Forming Processes Using Induction of Decision Trees
    Autorzy:
    Hawryluk, M.
    Wilk-Kołodziejczyk, D.
    Regulski, K.
    Głowacki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/351927.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    regression tree induction
    properties approximation
    physical modelling
    soft model materials
    Opis:
    The article discusses the development of an approximation model of selected plastic and mechanical properties obtained from compression tests of model materials used in physical modeling. The use of physical modeling with the use of soft model materials such as a synthetic wax branch with various modifiers is a popular tool used as an alternative or verification of numerical modeling of bulk metal forming processes. In order to develop an algorithm to facilitate the choice of material model to simulate the behavior of real-metallic materials used in industrial production processes the induction of decision trees was used. First of all, the Statistica program was used for data mining, which made it possible to determine / find the relationship between the percentage of particular constituents of the model material (base material and modifiers) and yield strength, critical and maximum strain, and provide the opportunity to indicate the most important variables determining the shape of the stress - strain curve. Next, using the induction of decision trees, an approximation model was developed, which allowed to create an algorithm facilitating the selection of individual modifying components. The last stage of the research was verification of the correctness of the developed algorithm. The obtained research results indicate the possibility of using decision tree induction to approximate selected properties of modeling materials simulating the behavior of real materials, thus eliminating the need for costly and time-consuming experiments carried out on metallic material.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 1073-1085
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of the BA1044 alloy properties and their interpretation with the use of fuzzy logic
    Autorzy:
    Górny, Z.
    Kluska-Nawarecka, S.
    Wilk-Kołodziejczyk, D.
    Saja, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/380513.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    modification
    heat treatment
    copper alloy
    artificial intelligence
    fuzzy logic
    simulation studies
    modyfikacja
    obróbka cieplna
    stop miedzi
    sztuczna inteligencja
    logika rozmyta
    badania symulacyjne
    Opis:
    The study presents the results of research aimed at the construction of a model of the relationship between the physical properties of metal and the types of toughening treatment and modifiers used in the modification of BA1044 alloy. Samples of melts were subjected to four variants of the heat treatment and to five types of modification. Studies of the samples consisted in measurements of five physical parameters. Consequently, it was necessary to seek a relationship between the nine input parameters and five output parameters. With this number of the variables and a limited number of samples, searching for the relationships by way of statistical methods was obviously impossible, so it was decided to create an approximate model through the use of fuzzy logic. This study describes the process of creating a model and presents the results of some simulation experiments that confirm the validity of the correct approach.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 2; 75-79
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie wykresów CTP niskostopowego żeliwa sferoidalnego do opracowania technologii wytwarzania żeliwa ADI
    The use of TTT diagrams of low-alloy ductile cast iron to develop a technology for the production of ADI
    Autorzy:
    Mrzygłód, B.
    Kluska-Nawarecka, S.
    Kowalski, A.
    Wilk-Kołodziejczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/391646.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
    Tematy:
    wykresy CTPc
    wykresy CTPi
    żeliwo sferoidalne
    żeliwo ADI
    struktura
    CCT diagrams
    TTT diagrams
    ductile cast iron
    ADI
    structure
    Opis:
    Omówiono znaczenie wykresów CTPc i CTPi w procesach obróbki cieplnej żeliwa sferoidalnego, szczególnie przy wytwarzaniu żeliwa ADI. Dokonano przeglądu literatury dotyczącej zagadnienia. Badania własne obejmowały opracowanie wykresów CTP dla czterech rodzajów żeliwa sferoidalnego różniących się głównie zawartością dodatków niklu, miedzi i molibdenu, odpowiednio: 1,55% Ni i 0,73% Cu; 2,26% Ni i 1,44% Cu; 1,60% Ni i 0,69% Cu oraz 1,50% Ni i 0,45% Mo. Zamieszczono mikrostruktury produktów przemiany przechłodzonego austenitu z wybranych próbek wykorzystanych do budowy wykresu CTPc-4. Na podstawie analizy otrzymanych wykresów omówiono wpływ Ni, Cu i Mo na temperaturę i czas poszczególnych przemian fazowych żeliwa sferoidalnego podczas chłodzenia anizotermicznego i izotermicznego. Uzyskano właściwości żeliwa ADI z dodatkami 1,55% Ni i 0,73% Cu spełniające wymagania dla 4 gatunków wg normy EN-PN 1563.
    The presented paper is a description of the significance of CCT and TTT diagrams in the processes of heat treatment of ductile cast iron, and especially during the production of ADI. A review of literature in the subject was made. Own research included drawing up TTT diagrams for four types of ductile cast iron which mainly differed with respect to the content of nickel, copper and molybdenum additions, respectively: 1.55% Ni and 0.73% Cu; 2.26% Ni and 1.44% Cu; 1.60% Ni and 0.69% Cu, as well as 1.50% Ni and 0.45% Mo. Presented are microstructures of products of overcooled austenite transformations from the selected samples used for the construction of a CCT-4 diagram. On the basis of the analysis of the achieved diagrams, the influence of Ni, Cu and Mo on temperature and time of particular phase transformations in ductile cast iron during anisothermal and isothermal cooling is discussed. Properties of ADI with additions of 1.55% Ni and 0.73% Cu were determined which meet the requirements for four types pf cast iron according to the standard EN-PN 1563.
    Źródło:
    Prace Instytutu Odlewnictwa; 2013, 53, 4; 85-111
    1899-2439
    Pojawia się w:
    Prace Instytutu Odlewnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Case-Based Reasoning System for the Selection of Silumin Alloying Elements
    Autorzy:
    Rojek, G.
    Regulski, K.
    Kluska-Nawarecka, S.
    Wilk-Kołodziejczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/382446.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry industry
    information technology
    silumin
    mechanical properties
    modified alloys
    additions Cr, Mo, V, W
    przemysł odlewniczy
    technologia informacyjna
    właściwości mechaniczne
    stopy modyfikowane
    dodatki Cr, Mo, V, W
    Opis:
    This work presents the project of the application of Case-based reasoning (CBR) methodology to an advisory system. This system should give an assistance by selection of proper alloying additives in order to obtain a material with predetermined mechanical properties. The considered material is silumin EN AC-46000 (hypoeutectic Al-Si alloy) that is modified by the addition of Cr, Mo, V and W elements in the range from 0% to 0.5% in the modified alloy. The projected system should indicate to the user the content of particular additives so that the obtained material is in the chosen range of parameters: tensile strength Rm, yield strength Rp0.2, elongation A and hardness HB. The CBR methodology solves new problems basing on the solutions of similar problems resolved in the past. The advantage of the CBR application is that the advisory system increases knowledge base as the subsequent use of the system. The presented design of the advisory system also considers issues related to the ergonomics of its operation.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 3; 126-131
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Implementation of Computer Platform for Foundries Cooperating in a Supply Chain
    Autorzy:
    Wilk-Kołodziejczyk, D.
    Kluska-Nawarecka, S.
    Rojek, G.
    Regulski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/382875.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    application of information technology
    foundry industry
    innovative foundry technologies
    innovative materials
    multi-agent technology
    production support
    zastosowanie technologii informatycznych
    przemysł odlewniczy
    innowacyjne technologie odlewnicze
    materiały innowacyjne
    wsparcie produkcji
    Opis:
    This article presents a practical solution in the form of implementation of agent-based platform for the management of contracts in a network of foundries. The described implementation is a continuation of earlier scientific work in the field of design and theoretical system specification for cooperating companies [1]. The implementation addresses key design assumptions - the system is implemented using multi-agent technology, which offers the possibility of decentralisation and distributed processing of specified contracts and tenders. The implemented system enables the joint management of orders for a network of small and medium-sized metallurgical plants, while providing them with greater competitiveness and the ability to carry out large procurements. The article presents the functional aspects of the system - the user interface and the principle of operation of individual agents that represent businesses seeking potential suppliers or recipients of services and products. Additionally, the system is equipped with a bi-directional agent translating standards based on ontologies, which aims to automate the decision-making process during tender specifications as a response to the request.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 3; 111-116
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computer Advisory System in the Domain of Cooper Alloys Manufacturing
    Autorzy:
    Wilk-Kołodziejczyk, D.
    Kluska-Nawarecka, S.
    Rojek, G.
    Regulski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/383285.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    copper alloy
    bronze
    modification
    quenching
    tempering
    cased based reasoning
    stop miedzi
    brąz
    modyfikacja
    hartowanie
    odpuszczanie
    Opis:
    The main scope of the article is the development of a computer system, which should give advices at problem of cooper alloys manufacturing. This problem relates with choosing of an appropriate type of bronze (e.g. the BA 1044 bronze) with possible modification (e.g. calcium carbide modifications: Ca + C or CaC2) and possible heat treatment operations (quenching, tempering) in order to obtain desired mechanical properties of manufactured material described by tensile strength - Rm, yield strength - Rp0.2 and elongation - A5. By construction of the computer system being the goal of presented here work Case-based Reasoning is proposed to be used. Case-based Reasoning is the methodology within Artificial Intelligence techniques, which enables solving new problems basing on experiences that are solutions obtained in the past. Case-based Reasoning also enables incremental learning, because every new experience is retained each time in order to be available for future processes of problem solving. Proposed by the developed system solution can be used by a technologist as a rough solution for cooper alloys manufacturing problem, which requires further tests in order to confirm it correctness.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3; 77-80
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of the Process of Data Acquisition Regarding the Process of Casting from the Internet
    Autorzy:
    Wilk-Kolodziejczyk, D.
    Kluska-Nawarecka, S.
    Stefański, Z.
    Smolarek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380058.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry industry
    casting process
    information technology
    crawler
    przemysł odlewniczy
    proces odlewania
    technologie informatyczne
    roboty indeksujące
    Opis:
    Access to up-to-date information on technology, innovation, source publications, and the materials and services offered in a particular industry is very important for both industrial plants and departmental research centres. It should be noted that obtaining such information using publicly available search engines such as Google, Yahoo!, Bing, Bindu (mainly used in China) is only apparently easy because, due to their versatility, they deliver results with great redundancy. This leads to the need to analyze large data sets by linguistic methods or "manually", which is very tedious and time consuming. In this situation, it was considered reasonable to undertake studies aimed at acquiring relatively simple IT tools, i.e. crawlers, which allow their users to selectively search for information in a particular problem area, which in this particular case is casting. The intention of this work was to collect and analyze the experimental material that would allow describing the characteristics of the above solutions from the point of view of the range of their application, the quality of the results achieved, and possible limitations and preferences taking into account user needs.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 1; 212-216
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methodology for the Construction of a Rule-Based Knowledge Base Enabling the Selection of Appropriate Bronze Heat Treatment Parameters Using Rough Sets
    Metodyka budowy regułowej bazy wiedzy umożliwiającej dobór odpowiednich parametrów obróbki cieplnej brązów z zastosowaniem zbiorów przybliżonych
    Autorzy:
    Górny, Z.
    Kluska-Nawarecka, S.
    Wilk-Kołodziejczyk, D.
    Regulski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/353780.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    application of information technology to the foundry industry
    heat treatment
    classification algorithms
    rough sets
    data mining
    zastosowanie technologii informatycznych dla przemysłu odlewniczego
    obróbka cieplna
    algorytm klasyfikacji
    zbiory przybliżone
    Opis:
    Decisions regarding appropriate methods for the heat treatment of bronzes affect the final properties obtained in these materials. This study gives an example of the construction of a knowledge base with application of the rough set theory. Using relevant inference mechanisms, knowledge stored in the rule-based database allows the selection of appropriate heat treatment parameters to achieve the required properties of bronze. The paper presents the methodology and the results of exploratory research. It also discloses the methodology used in the creation of a knowledge base.
    Decyzje dotyczące odpowiedniej metody obróbki cieplnej brązów mają wpływ na uzyskanie końcowych własności tych materiałów. W pracy przedstawiono przykład budowy bazy wiedzy z zastosowaniem teorii zbiorów przybliżonych. Wiedza zgromadzona w bazie reguł umożliwia za pomocą mechanizmów wnioskowania dobór odpowiednich parametrów obróbki w celu uzyskania pożądanych własności brązu.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 1; 309-312
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of simulation model parameters for solidification of metals with use of agent-based evolutionary algorithm
    Optymalizacja parametrów modelu symulacyjnego procesu krzepnięcia metali z zastosowaniem agentowego algorytmu ewolucyjnego
    Autorzy:
    Kluska-Nawarecka, S.
    Smolarek-Grzyb, A.
    Byrski, A.
    Wilk-Kołodziejczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/305357.pdf
    Data publikacji:
    2008
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    numeryczna symulacja
    algorytmy ewolucyjne
    system agentowy
    proces krzepnięcia odlewów
    odlew
    numerical simulation
    evolutionary algorithm
    agent systems
    solidification casting process
    casting
    Opis:
    The finite elements method (FEM) is currently widely used for simulation of thermal processes. However, one of still unresolved problems remains proper selection of mathematical model parameters for these processes. As far as modelling of cooling casts in forms is concerned, particular difficulties appear while estimating values of numerous coefficients such as: heat transport coefficient between metal and form, specific heat, metal and form heat conduction coefficient, metal and form density. Coefficients mentioned above depend not only on materials properties but also on temperature. In the paper the idea of optimalization of simulation method parameters based on adaptive adjustment of curve representing simulation result and result obtained in physical experiment is presented along with the idea of evolutionary and agent-based evolutionary optimization system designed to conduct such optimizations. Preliminary results obtained with use of ABAQUS system available in ACK CYFRONET and software developed at AGH-UST conclude the paper.
    Metoda elementów skończonych (MES) znajduje obecnie liczne zastosowania w symulacji procesów cieplnych. Wciąż jednak nierozwiązalny pozostaje problem doboru niektórych współczynników modeli matematycznych tych procesów. Przy modelowaniu stygnięcia odlewów w formie, szczególne trudności powstają przy wyznaczeniu wartości licznych parametrów, np.: współczynnika transportu ciepła pomiędzy metalem a formą, ciepła właściwego, współczynnika przewodnictwa cieplnego metalu i formy, gęstości metalu i formy. Współczynniki te zależą nie tylko od właściwości materiałów, lecz również od temperatury. W artykule zaproponowano metodę optymalizacji wartości parametrów modelu opartą na adaptacyjnym dostosowaniu krzywej stanowiącej wynik symulacji do przebiegu uzyskanego w eksperymencie fizycznym z zastosowaniem algorytmu ewolucyjnego w wersji agentowej. Wstępne wyniki obliczeń zostały zrealizowane przy wykorzystaniu systemu ABAQUS dostępnego w ACK CYFRONET oraz oprogramowania opracowanego przez AGH-UST.
    Źródło:
    Computer Science; 2008, 9; 55-66
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Overview of activities on the internet devoted to casting technology
    Autorzy:
    Wilk-Kołodziejczyk, D.
    Regulski, K.
    Dziaduś-Rudnicka, J.
    Kluska-Nawarecka, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/382912.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    komponent wiedzy
    proces produkcyjny
    odlewnictwo
    metalurgia
    media społecznościowe
    wyszukiwanie internetowe
    odlewnictwo metali
    technologia odlewnicza
    knowledge components
    production process
    foundry
    metallurgy
    social media
    searching on internet
    metal casting
    casting technology
    Opis:
    Article present various forms of transfer of information available on the Internet. An attempt was made to show the possibility of such a selection of the knowledge sources that, taking into account user preferences, would arouse his interest, showing in parallel the intended substantive content. This commitment is shown in the context of the current assumptions of building a platform dedicated to support the needs of production processes in foundry and metallurgy.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 2; 245-250
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computer Catalog and Semantic Search of Data in the Domain of Cast Iron Processing
    Autorzy:
    Rojek, G.
    Regulski, K.
    Wilk-Kołodziejczyk, D.
    Kluska-Nawarecka, S.
    Wawrzaszek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381770.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    application of information technologies
    foundry
    semantic search
    ontology
    cast iron processing
    zastosowanie technologii informacyjnych
    odlewnictwo
    obróbka żeliwa
    Opis:
    The aim of this study is to design and implement a computer system, which will allow the semantic cataloging and data retrieval in the field of cast iron processing. The intention is to let the system architecture allow for consideration of data on various processing techniques based on the information available or searched by a potential user. This is achieved by separating the system code from the knowledge of the processing operations or from the chemical composition of the material being processed. This is made possible by the creation and subsequent use of formal knowledge representation in the form of ontology. So, any use of the system is associated with the use of ontologies, either as an aid for the cataloging of new data, or as an indication of restrictions imposed on the data which draw user attention. The use of formal knowledge representation also allows consideration of semantic meaning, a consequence of which may be, for example, returning all elements in subclasses of the searched process class or material grade.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 2; 79-84
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selection of materials and development of technology for the production of elements used in conditions of extreme tribological wear
    Autorzy:
    Wilk-Kołodziejczyk, D.
    Pirowski, Z.
    Grudzień-Rakoczy, M.
    Bitka, A.
    Chrzan, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079807.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting technologies
    wear
    selection of materials
    conditions of extreme
    shell mold
    innowacyjne technologie odlewnicze
    zużycie tribologiczne
    dobór materiałów
    warunki ekstremalne
    Opis:
    Work was done as a part of the project " New generation haulage system of highly productive longwall systems" aiming to develop and implement a new longwall shearer system called KOMTRACK. The widely used EICOTRACK feed system developed forty years ago is not adapted to modern longwall shearers' power. Within the project, an innovative, flexible feed system with a modular structure was created with the possibility of continuous adjustment to the carbon wall's unevenness. Newly-developed three cast steels variants have been initially selected to fabricate this system's elements. The material's final selection was realized based on the tensile tests, Charpy impact tests, Brinell hardness surveys, and wear resistance measurements. Results analysis allowed to select cast steel marked as "2", which fulfilled all requirements and was used in further casting trials.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 4; 47-54
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computer-Assisted Integration of Knowledge in the Context of Identification of the Causes of Defects in Castings
    Wspomagana komputerowo integracja wiedzy, w kontekście identyfikacji przyczyn powstawania wad odlewów
    Autorzy:
    Kluska-Nawarecka, S.
    Wilk-Kolodziejczyk, D.
    Dajda, J.
    Macura, M.
    Regulski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/356329.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    casting defects diagnostics
    data integration
    ETL
    Extract-Transform-Load
    diagnostyka wad odlewów
    integracja danych
    Opis:
    The paper outlines the rules of creating diagnostic tasks scenarios in determining the causes of defects in castings. The paper presents as well the rules of operation of the computer system for data integration based on Extract-Trasform-Load technology, and a description of prototype implementation of this system, also examples of the tests that was carried out.
    W pracy naszkicowano zasady tworzenia scenariuszy działań diagnostycznych przy określeniu przyczyn powstawania wad odlewów. Przedstawiono zasady działania informatycznego systemu integracji danych opartego na zastosowaniu technologii Extract-Trasform-Load, oraz opis prototypowej realizacji tego systemu, a także przykłady przeprowadzonych testów.
    Źródło:
    Archives of Metallurgy and Materials; 2014, 59, 2; 743-746
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heuristic Model of the Mechanical Properties of a Hypoeutectic EN AC-42100 (EN AC-AlSi7Mg0.3) Silumin Alloy Subjected to Heat Treatment
    Autorzy:
    Górny, Z.
    Kluska-Nawarecka, S.
    Czekaj, E.
    Wilk-Kołodziejczyk, D.
    Saja, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/383182.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    information technology
    application of information technology
    foundry industry
    silumin alloy
    mechanical properties
    heat treatment
    fuzzy logic
    artificial intelligence
    technologie informatyczne
    zastosowanie technologii informatycznych
    przemysł odlewniczy
    silumin
    właściwości mechaniczne
    obróbka cieplna
    sztuczna inteligencja
    Opis:
    The object of the experimental studies was to determine the mechanical properties of a hypoeutectic EN AC - 42100 (EN ACAlSi7Mg0,3) silumin alloy, where the said properties are changing as a result of subjecting the samples of different types to solution treatment. An important aspect of the studies was the use type of device for the heat treatment. As a basic parameter representing the mechanical properties, the tensile strength of the metal (Rm) was adopted.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 4; 35-38
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Use of Formal Knowledge Representation in Operating on Resources Concerning Cast Iron Processing
    Autorzy:
    Kluska-Nawarecka, S.
    Wilk-Kołodziejczyk, D.
    Rojek, G.
    Regulski, K.
    Polek, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/380345.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    information technology
    foundry industry
    automation in foundry
    robotics in foundry
    semantic analysis
    semantic search
    technologia informatyczna
    przemysł odlewniczy
    automatyka w odlewnictwie
    robotyka w odlewnictwie
    analiza semantyczna
    wyszukiwarka semantyczna
    Opis:
    The problem of materials selection in terms of their mechanical properties during the design of new products is a key issue of design. The complexity of this process is mainly due to a multitude of variants in the previously produced materials and the possibility of their further processing improving the properties. In everyday practice, the problem is solved basing on expert or designer knowledge. The paper is the proposition of a solution using computer-aided analysis of material experimental data, which may be acquired from external data sources. In both cases, taking into account the rapid growth of data, additional tools become increasingly important, mainly those which offer support for adding, viewing, and simple comparison of different experiments. In this paper, the use of formal knowledge representation in the form of an ontology is proposed as a bridge between physical repositories of data in the form of files and user queries, which are usually formulated in natural language. The number and the sophisticated internal structure of attributes or parameters that could be the criteria of the search for the user are an important issue in the traditional data search tools. Ontology, as a formal representation of knowledge, enables taking into account the known relationships between concepts in the field of cast iron, materials used and processing techniques. This allows the user to receive support by searching the results of experiments that relate to a specific material or processing treatment. Automatic presentation of the results which relate to similar materials or similar processing treatments is also possible, which should make the conducted analysis of the selection of materials or processing treatments more comprehensive by including a wider range of possible solutions.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2; 39-42
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of ALSV(FD) logic and XTT knowledge representation in the range of ADI properties
    Autorzy:
    Regulski, K.
    Wilk-Kołodziejczyk, D.
    Rojek, B.
    Kluska-Nawarecka, S.
    Adrian, W. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/380492.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry production
    computer aided foundry
    application of information technologies
    ADI
    ALSV
    rule based XTT format
    odlewnia
    odlewy
    komputerowe wspomaganie odlewni
    zastosowanie technologii informatycznych
    Opis:
    The objective of studies presented in this publication was structuring of research knowledge about the ADI functional properties and changes in these properties due to material treatment. The results obtained were an outcome of research on the selection of a format of knowledge representation that would be useful in further work aiming at the design, application and implementation of an effective system supporting the decisions of a technologist concerning the choice of a suitable material (ADI in this case) and appropriate treatment process (if necessary). ALSV(FD) logic allows easy modelling of knowledge, which should let addressees of the target system carry out knowledge modelling by themselves. The expressiveness of ALSV (FD) logic allows recording the values of attributes from the scope of the modelled domain regarding ADI, which is undoubtedly an advantage in the context of further use of the logic. Yet, although the logic by itself does not allow creating the rules of knowledge, it may form a basis for the XTT format that is rule-based notation. The difficulty in the use of XTT format for knowledge modelling is acceptable, but formalism is not suitable for the discovery of rules, and therefore the knowledge of technologist is required to determine the impact of process parameters on values that are functional properties of ADI. The characteristics of ALSV(FD) logic and XTT formalism, described in this article, cover the most important aspects of a broadly discussed, full evaluation of the applicability of these solutions in the construction of a system supporting the decisions of a technologist.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 2; 75-78
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Approximation of Ausferrite Content in the Compacted Graphite Iron with the Use of Combined Techniques of Data Mining
    Autorzy:
    Regulski, K.
    Wilk-Kołodziejczyk, D.
    Kacprzyk, B.
    Gumienny, G.
    Rojek, G.
    Mrzygłód, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/379587.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    information technologies
    foundry
    graphite irons
    compacted
    ausferrite
    data mining
    regression
    odlewnictwo
    technologie informacyjne
    zagęszczanie
    żeliwo grafitowe
    Opis:
    This article presents the methodology for exploratory analysis of data from microstructural studies of compacted graphite iron to gain knowledge about the factors favouring the formation of ausferrite. The studies led to the development of rules to evaluate the content of ausferrite based on the chemical composition. Data mining methods have been used to generate regression models such as boosted trees, random forest, and piecewise regression models. The development of a stepwise regression modelling process on the iteratively limited sets enabled, on the one hand, the improvement of forecasting precision and, on the other, acquisition of deeper knowledge about the ausferrite formation. Repeated examination of the significance of the effect of various factors in different regression models has allowed identification of the most important variables influencing the ausferrite content in different ranges of the parameters variability.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 117-122
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Austempered Ductile Iron Manufacturing Data Acquisition Process with the Use of Semantic Techniques
    Autorzy:
    Wilk-Kołodziejczyk, D.
    Kluska-Nawarecka, A. S.
    Regulski, K.
    Adrian, W.
    Jaśkowiec, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/355169.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    austempered ductile iron
    thermal treatment
    properties
    process data
    data integration
    ontology
    Opis:
    The aim of this work was to propose a methodology supporting the task of collecting the comparative data on studies of the mechanical properties of ADI. Collecting of research data is an important step in the process of finding the optimum design solutions for newly made products - experimental data allow us properly calibrate the manufacturing process of ADI to let the final product achieve the required properties. Parameters of the ADI production process, i.e. the time and temperature of austenitising and austempering, as well as the alloying elements added to ductile iron affect the ADI properties. The design process can use research data collected, among others, from the Web. As stated in the article, the process of data acquisition can be supported by semantic technologies, including ontologies which are descriptive logic formalism.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 4; 2117-2122
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Method to Make Classification of the Heat Treatment Processes Performed on Bronze Using Incomplete Knowledge
    Autorzy:
    Kluska-Nawarecka, S.
    Górny, Z.
    Regulski, K.
    Wilk-Kołodziejczyk, D.
    Jančíková, Z.
    David, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/947501.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    information technology
    foundry industry
    heat treatment
    classification algorithms
    rough sets
    data mining
    technologia informacyjna
    przemysł odlewniczy
    obróbka cieplna
    algorytmy klasyfikacyjne
    zbiory przybliżone
    Opis:
    The article describes the problem of selection of heat treatment parameters to obtain the required mechanical properties in heat- treated bronzes. A methodology for the construction of a classification model based on rough set theory is presented. A model of this type allows the construction of inference rules also in the case when our knowledge of the existing phenomena is incomplete, and this is situation commonly encountered when new materials enter the market. In the case of new test materials, such as the grade of bronze described in this article, we still lack full knowledge and the choice of heat treatment parameters is based on a fragmentary knowledge resulting from experimental studies. The measurement results can be useful in building of a model, this model, however, cannot be deterministic, but can only approximate the stochastic nature of phenomena. The use of rough set theory allows for efficient inference also in areas that are not yet fully explored.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 2; 69-72
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Heuristic Model Based on LPR in the Context of Material Conversion
    Autorzy:
    Wilk-Kołodziejczyk, D.
    Kluska-Nawarecka, S.
    Nawarecki, E.
    Śnieżyński, B.
    Jaśkowiec, K.
    Legień, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/352717.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conversion of a technology
    ductile iron
    ADI
    logic of plausible reasoning
    Opis:
    High complexity of the physical and chemical processes occurring in liquid metal is the reason why it is so difficult, impossible even sometimes, to make analytical models of these phenomena. In this situation, the use of heuristic models based on the experimental data and experience of technicians is fully justified since, in an approximate manner at least, they allow predicting the mechanical properties of the metal manufactured under given process conditions. The study presents a methodology applicable in the design of a heuristic model based on the formalism of the logic of plausible reasoning (LPR). The problem under consideration consists in finding a technological variant of the process that will give the desired product parameters while minimizing the cost of production. The conducted tests have shown the effectiveness of the proposed approach.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 3; 1603-1607
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optymalizacja dodatków Ni i Cu w żeliwie ADI z uwzględnieniem szybkości stygnięcia odlewu
    Optimization of Ni and Cu additions in ADI cast iron in respect of cast cooling rate
    Autorzy:
    Wilk-Kołodziejczyk, D.
    Kowalski, A.
    Opaliński, A.
    Regulski, K.
    Mrzygłód, B.
    Gumienny, G.
    Jaśkowiec, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/391520.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
    Tematy:
    żeliwo ADI
    obróbka cieplna
    właściwości mechaniczne
    struktura
    ADI cast iron
    thermal treatment
    mechanical properties
    structure
    Opis:
    W pracy analizowano wpływ dodatków Ni i Cu na właściwości mechaniczne żeliwa ADI w odlewach o różnej grubości ścianek. Zastosowano plan eksperymentu, stosując kombinacje dodatku Ni w ilości 0,5% i 1,5% oraz dodatku Cu w ilości 0,5% i 1,0%. Zawartość pozostałych pierwiastków wynosiła: C = 3,3−3,6%, Si = 2,2−2,6%, Mn = 0,10−0,13%, P do 0,05%, S do 0,020% (% wag.). Wykonano 4 wytopy żeliwa, odlewając wlewki o grubości 25 mm, 50 mm i 75 mm. Sferoidyzację żeliwa przeprowadzono metodą przewodu elastycznego (otoczka stalowa wypełniona magnezem). W formach odlewniczych zastosowano specjalny układ filtrująco-modyfikujący. Z każdego wytopu i z każdego wlewka wykonano próbki wytrzymałościowe. Po hartowaniu izotermicznym zmierzono Rm i A5. Opracowano wielomiany aproksymujące (Rm, A5) = f(Ni,Cu). Wielomiany te pozwalają na dobór optymalnych dodatków Ni i Cu dla uzyskania wymaganej wytrzymałości bądź plastyczności. Na podstawie wielomianów wykonano wykresy trójwymiarowe obrazujące powyższe zależności.
    The study analyzes the effect of Ni and Cu additions on the mechanical properties of ADI cast iron in casts with different wall thickness values. The applied experiment plan included the use of combinations of the Ni addition in the amount of 0.5% and 1.5% and the Cu addition in the amount of 0.5% and 1.0%. The content of the remaining elements equaled: C = 3 .3−3.6%, S i = 2 .2−2.6%, M n = 0 .10−0.13%, P max. 0.05%, S max. 0.020% (wt. %). Four cast iron melts were performed, by way of casting ingots with a thickness of 25 mm, 50 mm and 75 mm. The cast iron spheroidization was conducted by the flexible conduit method (steel envelope filled with magnesium). In the casting moulds, a special filtering-modifying system was applied. From each melt and each ingot, strength samples were prepared. After isothermal quenching, Rm and A5 were measured. The approximating polynomials (Rm, A5) = f(Ni,Cu) were elaborated. The polynomials make it possible to select the optimal Ni and Cu additions to obtain the required strength or plasticity. Based on the polynomials, three-dimensional diagrams illustrating the above relations were constructed.
    Źródło:
    Prace Instytutu Odlewnictwa; 2017, 57, 2; 85-94
    1899-2439
    Pojawia się w:
    Prace Instytutu Odlewnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction of Selected Mechanical Properties in Austempered Ductile Iron with Different Wall Thickness by the Decision Support Systems
    Autorzy:
    Jaśkowiec, Krzysztof
    Opaliński, Andrzej
    Kustra, Piotr
    Jach, D.
    Wilk-Kołodziejczyk, Dorota
    Powiązania:
    https://bibliotekanauki.pl/articles/27314159.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    ADI
    austempered ductile iron
    mechanical properties
    prediction
    decision support systems
    decision tree
    żeliwo sferoidalne
    właściwości mechaniczne
    prognozowanie
    systemy wspomagania decyzji
    Opis:
    The structure of Austempered Ductile Iron (ADI) is depend of many factors at individual stages of casting production. There is a rich literature documenting research on the relationship between heat treatment and the resulting microstructure of cast alloy. A significant amount of research is conducted towards the use of IT tools for indications production parameters for thin-walled castings, allowing for the selection of selected process parameters in order to obtain the expected properties. At the same time, the selection of these parameters should make it possible to obtain as few defects as possible. The input parameters of the solver is chemical composition Determined by the previous system module. Target wall thickness and HB of the product determined by the user. The method used to implement the solver is the method of Particle Swarm Optimization (PSO). The developed IT tool was used to determine the parameters of heat treatment, which will ensure obtaining the expected value for hardness. In the first stage, the ADI cast iron heat treatment parameters proposed by the expert were used, in the next part of the experiment, the settings proposed by the system were used. Used of the proposed IT tool, it was possible to reduce the number of deficiencies by 3%. The use of the solver in the case of castings with a wall thickness of 25 mm and 41 mm allowed to indication of process parameters allowing to obtain minimum mechanical properties in accordance with the PN-EN 1564:2012 standard. The results obtained by the solver for the selected parameters were verified. The indicated parameters were used to conduct experimental research. The tests obtained as a result of the physical experiment are convergent with the data from the solver.
    Źródło:
    Archives of Foundry Engineering; 2023, 23, 2; 137--144
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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