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    Wyświetlanie 1-14 z 14
    Tytuł:
    The arts in Poland’s‘quality’ periodicals of the 1940s and 1950s: A research report
    Autorzy:
    Howorus-Czajka, Magdalena
    Powiązania:
    https://bibliotekanauki.pl/articles/421557.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    History of the Polish press (1945–1989), the arts in ‘quality’ periodicals of the 1940s and 1950s
    historia prasy polskiej (1945-1989)
    zagadnienia plastyczne
    czasopiśmiennictwo kulturalne lat 40. i 50. XX wieku
    Opis:
    Although it is concerned with the situation of the Polish press in the 40s and 50s of the last century, this article does not pretend to be exhaustive in its coverage. Its scope is limited to those titles that showed interest in the arts and thus made an impact on the development of Polish art at that time. The principal aim of this study is to present the highlights of contemporary discussions about art, ie. to outline the major themes of the debate and signpost them to the key texts
    Źródło:
    Rocznik Historii Prasy Polskiej; 2014, 17, 1
    1509-1074
    Pojawia się w:
    Rocznik Historii Prasy Polskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Expert’s Model of Managerial Competencies for Engineer 4.0 (EMMCE)
    Autorzy:
    Więcek-Janka, Ewa
    Werner-Lewandowska, Karolina
    Radecki, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/2201186.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    competency model
    manager 4.0
    engineer 4.0
    industry 4.0
    Opis:
    The purpose of this article is to present a proposal for an expert’s model of managerial competencies in the era of the fourth industrial revolution, called Industry 4.0. This revolution results in the emergence of new competency requirements for employees at every organizational level. In the article, we focused on the requirements for Engineers 4.0, in connection with managerial competencies expected from them. In order to answer the research questions, we conducted expert research by referring to our previous studies. Findings: The conducted research allowed to develop an expert’s model of managerial competencies for Engineer 4.0 (EMMCE). The results of the study allowed to determine the scope of managerial competencies for an engineer in the age of Industry 4.0, thus contributing, in a practical scope, to the creation of requirements for candidates applying for a managerial position in manufacturing enterprises. The model makes it possible for educational and training entities to adapt their teaching programmes and training offer to the modern requirements of the industry.
    Źródło:
    Management and Production Engineering Review; 2023, 14, 1; 87--104
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pilot study of Industry 4.0 and digital technology prevalence in Russian manufacturing companies
    Autorzy:
    Lola, Inna S.
    Bakeev, Murat
    Powiązania:
    https://bibliotekanauki.pl/articles/407175.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    industry 4.0
    digitalization
    digital technologies
    business tendency observations
    manufacturing
    Opis:
    The spread of digital technologies dramatically changes production processes. The fourth industrial revolution opens up new opportunities for the introduction of technologies, having a significant impact on the production cycle, starting with highly automated production lines and ending with the large-scale implementation of technological solutions designed to improve productivity, optimize costs, quality and reliability. Defining digital transformations, primarily in the manufacturing industry, as a strategic imperative for the entire economy based on opinions and intentions of entrepreneurs (short and medium-term), key aspects of the digitalization process in Russian medium, high-tech and low-tech manufacturing industries are revealed. A set of tendencies in the development of digital technologies by their main types is presented, the level of industry participation in digital transformation is shown, as well as many other important digital transformation processes in enterprises that are not measured by quantitative statistics.
    Źródło:
    Management and Production Engineering Review; 2020, 11, 3; 26-37
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Industry 4.0: tools and implementation
    Autorzy:
    Sanghavi, Devansh
    Parikh, Sahil
    Raj, S. Aravind
    Powiązania:
    https://bibliotekanauki.pl/articles/407044.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Industry 4.0
    Internet of things
    cyber physical system
    CPS
    Smart Manufacturing
    cloud based manufacturing
    Big Data
    Opis:
    With the increasing demand of customisation and high-quality products, it is necessary for the industries to digitize the processes. Introduction of computers and Internet of things (IoT) devices, the processes are getting evolved and real time monitoring is got easier. With better monitoring of the processes, accurate results are being produced and accurate losses are being identified which in turn helps increasing the productivity. This introduction of computers and interaction as machines and computers is the latest industrial revolution known as Industry 4.0, where the organisation has the total control over the entire value chain of the life cycle of products. But it still remains a mere idea but an achievable one where IoT, big data, smart manufacturing and cloud-based manufacturing plays an important role. The difference between 3rd industrial revolution and 4th industrial revolution is that, Industry 4.0 also integrates human in the manufacturing process. The paper discusses about the different ways to implement the concept and the tools to be used to do the same.
    Źródło:
    Management and Production Engineering Review; 2019, 10, 3; 3--13
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A methodology for cloud manufacturing architecture in the context of industry 4.0
    Autorzy:
    Talhi, E.
    Huet, J.-C.
    Fortineau, V.
    Lamouri, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/200492.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cloud manufacturing
    cloud-based services
    service-oriented architecture
    Industry 4.0
    ontology
    Opis:
    This paper deals with a methodology for the implementation of cloud manufacturing (CM) architecture. CM is a current paradigm in which dynamically scalable and virtualized resources are provided to users as services over the Internet. CM is based on the concept of coud computing, which is essential in the Industry 4.0 trend. A CM architecture is employed to map users and providers of manufacturing resources. It reduces costs and development time during a product lifecycle. Some providers use different descriptions of their services, so we propose taking advantage of semantic web technologies such as ontologies to tackle this issue. Indeed, robust tools are proposed for mapping providers’ descriptions and user requests to find the most appropriate service. The ontology defines the stages of the product lifecycle as services. It also takes into account the features of coud computing (storage, computing capacity, etc.). The CM ontology will contribute to intelligent and automated service discovery. The proposed methodology is inspired by the ASDI framework (analysis–specification–design–implementation), which has already been used in the supply chain, healthcare and manufacturing domains. The aim of the new methodology is to propose an easy method of designing a library of components for a CM architecture. An example of the application of this methodology with a simulation model, based on the CloudSim software, is presented. The result can be used to help the industrial decision-makers who want to design CM architectures.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 2; 271-284
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forecasting the Development of RFID Technology
    Autorzy:
    Gladysz, Bartlomiej
    Corti, Donatella
    Montini, Elias
    Powiązania:
    https://bibliotekanauki.pl/articles/1841427.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Industry 4.0
    technology management
    technology audit
    technology roadmap
    S-curves
    patent analysis
    RFID
    Opis:
    Industry 4.0 (I4) as a concept offers powerful opportunities for many businesses. The set of Industry 4.0 technologies is still discussed, and boundaries are not perfectly clear. However, implementation of Industry 4.0 concept becomes strategic principle, and necessary condition for succeeding on turbulent markets. Radio Frequency Identification (RFID) was used before I4 emerged. However, it should be treated as its important part and even enabler. The question arises how adoption of RFID was impacted by I4 paradigm. Therefore, to answer this question a set of technology management tools was selected and applied to forecast RFID potential development in forthcoming years. Moreover, case studies were conducted for technology management tools and their applications for RFID for qualitative discussion of its relevance. It aimed to prove that existing toolset should be applied for modern technologies related to I4. Tools were proven to be necessary and successful. However, some specific challenges were observed and discussed.
    Źródło:
    Management and Production Engineering Review; 2021, 12, 1; 38-47
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prewencyjne ingerencje cenzorskie w „Tygodniku Powszechnym” na przełomie lat 40. i 50.
    PREVENTIVE CENSORSHIP IN “TYGODNIK POWSZECHNY” IN THE LATE 1940S AND EARLY 1950S
    Autorzy:
    Pietrzkiewicz, Iwona
    Rogoż, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/421659.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Tygodnik Powszechny”
    preventive censorship
    censor’s interventions
    ideology
    socrealism
    press polemics
    ideological dispute
    Stefan Kisielewski
    newspeak
    Opis:
    This is an analysis of the official records of preventive censorship interventions into texts that were to be published in ,,Tygodnik Powszechny” between 1 January 1949 and May 1952. The original files which consist of over 1000 protocols are kept at the Central Archives of Modern Records (AAN). The article identifies the themes and the alleged intent of texts that were either suppressed in their entirety or in parts. It also looks at the justification of the interventions and its characteristic newspeak formulas.Finally, the article considers various strategies of authors seeking to minimalize the censors’ cuts
    Źródło:
    Rocznik Historii Prasy Polskiej; 2011, 14, 1-2(27-28); 143-170
    1509-1074
    Pojawia się w:
    Rocznik Historii Prasy Polskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ tradycji literackiej i rzeczywistości okresu pryncypatu na obraz ustrojów w Historii rzymskiej Kasjusza Diona (LII 1-40)
    THE INFLUENCE OF THE LITERARY TRADITION AND OF THE REALITIES OF THE PRINCIPATE ON THE CONSTITUTIONAL DEBATE IN CASSIUS DIO’S ROMAN HISTORY LII 1-40
    Autorzy:
    Kułaj, Marta
    Powiązania:
    https://bibliotekanauki.pl/articles/702907.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Cassius Dio
    Greek and Latin political terminology
    Opis:
    An analysis of the way in which the terms pertaining to the Principate are used in books XLIV-LVI of Cassius Dio’s work, and especially in book LII, containing the debate between Agrippa and Maecenas on the future constitution of Rome, leads to the conclusion that the scholars who claim that Cassius Dio describes the Principate from the Greek political perspective are wrong: though he uses Greek terms, they are substitutes for Latin ones, used in Roman political life of the period.
    Źródło:
    Meander; 2008, 63, 1-4; 108-124
    0025-6285
    Pojawia się w:
    Meander
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    IoT : review of critical issues
    Autorzy:
    Romaniuk, R. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/226508.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Internet of Things
    IoT
    industrial IoT
    machine to machine communications
    industry 4.0
    IoT civilization
    artificial super-intelligence
    cyber-man
    future of work
    Opis:
    Science - research transformation of the Internet of Things (IoT) has a number of colours and shadows, many dimensions including technical, social, community, financial, economic and civilization. This transformation has many wide development roads but also numerable pitfalls and traps. It does not take place solely at the level of scientific and technical progress and innovation. It preliminarily takes place in a complex sociopolitical-economic context, narrowed for simplification as social acceptance and education only. Such acceptance, for example expressed simply by demand and market popularity, for simple items supplemented by useful functions, such as an iron that recognizes the type of fabric and matches its work accordingly, a completely autonomous vacuum cleaner, etc., is trivial. We aim at much deeper relations of IoT with society. If IoT were only adding such functionalities, it would not be worth the time to consider it here. IoT causes a lot of confusion for much more important reasons in many areas of life. Somewhere further on the potential paths of IoT development, it has been noted with interest, but also with anxiety, the possibility of its empowerment as local but also global, superintendent surveillance system, gathering enormous amounts of information, creating knowledge and making autonomous decisions. Potential subjectivity must include such attributes as acquiting from the creator, autonomy, consciousness, morality and further building by the society the whole legal system around the new entity. It will not be a single entity, it will be a whole virtual society, with electronic people. The consequences can be far-reaching and appear as an inevitable option on such a scale for the first time in the history of our human society. Overcoming certain barriers recognized by us may mean that the intelligence and consciousness are not only attributes of the human biological mind. Such reasoning, not without a reason, encounters strong resistance. However, there is a fundamental difference between the opposition to some genetic research and the potential modification of man himself, and the opposition to machine building, a system of superintendence that far exceeds the possibilities of a single man and of entire societies.
    Źródło:
    International Journal of Electronics and Telecommunications; 2018, 64, 1; 95-102
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Product robustness philosophy – a strategy towards zero variation manufacturing (ZVM)
    Autorzy:
    Boorla, M. S.
    Eifler, T.
    McMahon, C.
    Howard, T. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/406976.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    product robustness
    variation absorption
    product maturation
    zero variation manufacturing
    Industry 4.0
    production readiness
    Opis:
    A product is referred to as robust when its performance is consistent. In current product robustness paradigms, robustness is the responsibility of engineering design. Drawings and 3D models should be released to manufacturing after applying all the possible robust design principles. But there are no methods referred for manufacturing to carry and improve product robustness after the design freeze. This paper proposes a process of inducing product robustness at all stages of product development from design release to the start of mass production. A manufacturing strategy of absorbing all obvious variations and an approach of turning variations to cancel one another are defined. Verified the application feasibility and established the robustness quantification method at each stage. The theoretical and actual sensitivity of different parameters is identified as indicators. Theoretical and actual performance variation and accuracy of estimation are established as robustness metric. Manufacturing plan alignment to design, complimenting the design and process sensitivities, countering process mean shifts with tool deviations, higher adjustable assembly tools are enablers to achieve product robustness.
    Źródło:
    Management and Production Engineering Review; 2018, 9, 2; 3-12
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The work of international women’s organizations in Praca Kobiet [Women’s Work], a monthly published by the Social and Civic Women’s League (March – December 1946)
    Działalność zagranicznych ruchów kobiecych w świetle publikacji „Pracy Kobiet” — organu prasowego Społeczno-Obywatelskiej Ligi Kobiet (marzec – grudzień 1946)
    Autorzy:
    Miodowski, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/2074376.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    the second half of the 1940s in the 20th century
    history of women
    international leftist women’s organizations
    national leftist women’s organizations
    history of the press
    Polish leftist women’s press
    „Praca Kobiet”
    druga połowa lat 40. XX w.
    historia kobiet
    międzynarodowe lewicowe organizacje kobiece
    krajowe lewicowe organizacje kobiece
    historia prasy
    polska lewicowa prasa kobieca
    Opis:
    The main purpose of the publication is to determine what knowledge was available to Polish women about the situation of women and feminist organizations in Europe and on other continents? What picture of the activities of these organizations was presented by the Women’s League press bodies? By using the classic method of analyzing and criticizing the content of the press, and as an auxiliary methodology of monographic research, it was possible to find answers to these and similar questions. Studies have shown, among others what role such organizations as the Democratic Committee of Bulgarian Women and the Democratic Union of Finnish Women played in the emancipation processes.
    Głównym celem publikacji jest ustalenie, jaką wiedzę tuż po II wojnie światowej pozyskiwały Polki z prasy na temat sytuacji kobiet i działalności stowarzyszeń feministycznych w Europie i na innych kontynentach? Ponadto jaki obraz funkcjonowania tych organizacji prezentowały organy prasowe Ligi Kobiet? Dzięki zastosowaniu klasycznej metody analizy i krytyki treści prasy oraz pomocniczo metodologii badań monograficznych można znaleźć odpowiedzi na te i podobne pytania. Podjęte badania pokazują, że w tamtym czasie do Polek docierały za pośrednictwem prasy bardzo lakoniczne informacje o roli stowarzyszeń feministycznych w procesie emancypacji kobiet w poszczególnych krajach.
    Źródło:
    Rocznik Historii Prasy Polskiej; 2020, 23, 1; 99-114
    1509-1074
    Pojawia się w:
    Rocznik Historii Prasy Polskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lean principles for organizing items in an automated storage and retrieval system: an association rule mining – based approach
    Autorzy:
    Bevilacqua, Maurizio
    Ciarapica, Filippo Emanuele
    Antomarioni, Sara
    Powiązania:
    https://bibliotekanauki.pl/articles/407183.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lean management
    AS/RS
    Association Rules
    Data Mining
    Industry 4.0
    5S
    shoe manufacturing
    Opis:
    The application of the 5S methodology to warehouse management represents an important step for all manufacturing companies, especially for managing products that consist of a large number of components. Moreover, from a lean production point of view, inventory management requires a reduction in inventory wastes in terms of costs, quantities and time of non-added value tasks. Moving towards an Industry 4.0 environment, a deeper understanding of data provided by production processes and supply chain operations is needed: the application of Data Mining techniques can provide valuable support in such an objective. In this context, a procedure aiming at reducing the number and the duration of picking processes in an Automated Storage and Retrieval System. Association Rule Mining is applied for reducing time wasted during the storage and retrieval activities of components and finished products, pursuing the space and material management philosophy expressed by the 5S methodology. The first step of the proposed procedure requires the evaluation of the picking frequency for each component. Historical data are analyzed to extract the association rules describing the sets of components frequently belonging to the same order. Then, the allocation of items in the Automated Storage and Retrieval System is performed considering (a) the association degree, i.e., the confidence of the rule, between the components under analysis and (b) the spatial availability. The main contribution of this work is the development of a versatile procedure for eliminating time waste in the picking processes from an AS/RS. A real-life example of a manufacturing company is also presented to explain the proposed procedure, as well as further research development worthy of investigation.
    Źródło:
    Management and Production Engineering Review; 2019, 10, 1; 29-36
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Karol Wojtyła’s "Poetry And Dramas" on the 40 th anniversary of his election as Pope John Paul II
    „Poezje i dramaty” Karola Wojtyły – Jana Pawła II (w czterdziestolecie)
    Autorzy:
    Okoń, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/2087972.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Pope John Paul II
    Karol Wojtyła’s literary work
    publication history
    juvenilia
    Znak Publishing House
    Jan Paweł II
    Karol Wojtyła
    "Poezje i dramaty"
    "Dzieła poetyckie i teatralne"
    Juwenilia
    Wydawnictwo Znak
    Opis:
    This article was prompted by a joint declaration made on 28 September 2015 by the Archbishops of Cracow and Warsaw and the state authorities of the two cities that they would provide means for publishing project ‘A Critical Edition of the Literary Works of Karol Wojtyła – John Paul II’. This decision, marking the 100th anniversary of the birth of Karol Wojtyła in May 2020, signalizes the importance of the project which goes beyond a standard publication of an author’s complete works. The series was inaugurated by the publication in 2018 of Volume One (Juvenilia, 1938–1946), whose editors are expected to continue working on the following volumes. The author of this article takes a look at the first collected works edition of The Poetry and Dramas of Karol Wojtyła – John Paul II, published in 1979 (it actually went to press in 1980) under the directorship of Jacek Woźniakowski and authorized by John Paul II himself. It was in fact a complete edition as its editors succeeded in collecting all of Karol Wojtyła literary works from the moment he enrolled at the Seminary until his election as Pope in 1978. All the texts used for that edition were collected at source and in that respect can hardly be surpassed. For over forty years it offered a reliable store of Karol Wojtyła’s poems and plays to ordinary readers, translators, producers of plays and public ceremonies. In this article we can find a first-hand account of the story of that first edition from its inception, the role of the editors of the weekly Tygodnik Powszechny, the decisions taken at the Znak head office and the author’s own contribution as editor. It is at this point that he explains the decision to exclude from their edition Karol Wojtyła’s juvenila from his student years.
    Źródło:
    Ruch Literacki; 2020, 1; 69-90
    0035-9602
    Pojawia się w:
    Ruch Literacki
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of Laboratory Hot Rolling of Brittle Fe-40at.%Al-Zr-B Aluminide
    Optymalizacja procesu walcowania na gorąco aluminidku Fe-40at.%Al-Zr-B na podstawie prób laboratoryjnych
    Autorzy:
    Schindler, I.
    Hadasik, E.
    Kopeček, J.
    Kawulok, P.
    Fabík, R.
    Opěla, P.
    Rusz, S.
    Kawulok, R.
    Jabłońska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/356747.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    iron aluminides
    as-cast structure
    low plasticity
    hot rolling
    recrystallization
    EBSD analysis
    grain size
    FEM simulation
    niejednorodna mikrostruktura odlewu
    walcowanie na gorąco
    rekrystalizacja
    analiza EBSD
    wielkość ziarna
    symulacja MES
    glinki żelaza
    Opis:
    Use of the protective steel capsules enabled to manage the laboratory hot flat rolling of the extremely brittle as-cast aluminide Fe-40at.%Al-Zr-B with the total height reduction of almost 70 %. The hot rolling parameters were optimized to obtain the best combination of deformation temperature (from 1160°C up to 1240°C) and rolling speed (from 0.14 m·s−1 to 0.53 m·s−1). The resistance against cracking and refinement of the highly heterogeneous cast microstructure were the main criteria. Both experiments and mathematical simulations based on FEM demonstrated that it is not possible to exploit enhanced plasticity of the investigated alloy at low strain rates in the hot rolling process. The heat flux from the sample to the working rolls is so intensive at low rolling speed that even the protective capsule does not prevent massive appearance of the surface transverse cracking. The homogeneity and size of product’s grain was influenced significantly by temperature of deformation, whereas the effect of rolling speed was relatively negligible. The optimal forming parameters were found as rolling temperature 1200°C and the rolling speed 0.35 m·s-1. The effective technology of the iron aluminide Fe-40at.% Al-Zr-B preparation by simple processes of melting, casting and hot rolling was thus established and optimized.
    Zastosowanie ochronnych stalowych kapsuł pozwoliło na przeprowadzenie laboratoryjnego walcowania na gorąco pasm z niezwykle kruchego odlewanego aluminidku żelaza (stopu na osnowie fazy międzymetalicznej) Fe-40at.%Al-Zr-B, które umożliwiło redukcję wysokości o prawie 70%. Parametry walcowania na gorąco były dostosowywane celem uzyskania korzystnego zakresu temperatury odkształcenia (od 1160°C do 1240°C) oraz prędkości walcowania (od 0.14 m·s−1 do 0.53 m·s−1) dla otrzymania pasma bez pęknięć i rozdrobnienia silnie niejednorodnej mikrostruktury odlewu. Zarówno eksperymenty jak i matematyczne symulacje oparte na MES wykazały, że niemożliwe jest uzyskanie dobrej plastyczności badanego stopu przy niskich prędkościach odkształcenia podczas walcowania na gorąco. Strumień ciepła płynący z próbki na walce jest tak intensywny przy małej prędkości walcowania, że nawet kapsuła ochronna nie zapobiega pojawieniu się powierzchniowych pęknięć poprzecznych. Jednorodność i rozmiar ziarn w materiale silnie zależy od temperatury odkształcenia, podczas gdy wpływ prędkości walcowania jest relatywnie niewielki. Optymalne parametry kształtowania stopu to: temperatura 1200°C oraz prędkość walcowania 0.35 m·s−1. Skuteczna technologia przygotowania aluminidku żelaza Fe-40at.%Al-Zr-B w prostym procesie topienia, odlewania i walcowania na gorąco została w ten sposób ustalona i zoptymalizowana.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 3A; 1693-1701
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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