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    Wyświetlanie 1-7 z 7
    Tytuł:
    Determination of Phase Transformation Temperatures by Dilatometric Test of S960MC Steel
    Autorzy:
    Málek, M.
    Mičian, M.
    Moravec, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837700.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    steel S960MC
    dilatometric test
    phase transformation temperatures
    metallography
    microstructure
    stal S960MC
    test dylatometryczny
    temperatura przemian fazowych
    metalografia
    mikrostruktura
    Opis:
    The phenomenon of “soft zone” is occurring in the heat affected zone (HAZ) of high strength low alloy (HSLA) steels. Therefore, the process of weld metal solidification and phase transformation in HAZ is essential to understand the behaviour of the material, especially in the case where welded joints are debilitating part of the construction. The simulation program SYSWELD is powerful tool to predict solidification and phase transformation of welding joint, what correspond to the mechanical properties of the joints. To achieve relevant results of the simulation, it is necessary to use right mathematic-material model of the investigated material. Dilatometric test is the important methods to gather necessary input values for material database. In this paper is investigated physical and metallurgical properties of S960MC steel. The dilatometric curves were carried out on the laboratory machine dilatometer DIL 805L. In addition to determination of the phase transformation temperatures at eight levels of the cooling rate, the microstructure and hardness of the material are further analysed. The hardness of the samples reflects the achieved microstructure. Depending on the cooling rate, several austenitic transformation products were observed such as pearlite, bainite, martensite and many different ferritic microstructures. The differences between the transformation temperature results using the first derivation method and the three tangent method are up to 2%. The limit cooling rate was set at value 30°C/s. The microstructure consists only of bainite and marten site and the hardness reaches a value of 348HV and higher.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 2; 57-64
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Which one to choose multi focus or trade-off among competitive priorities? Evidence from finnish SMEs
    Autorzy:
    Timilsina, B.
    Forsén, N.
    Takala, J.
    Malek, N. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/407042.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    business environment
    competitiveness
    firm performance
    competitive priority
    sustainable competitive advantage
    Opis:
    This paper examines the relationship between business environment, competitiveness and firm performance considering a survey data from three consecutive years: 2013-2015. The comparative analysis showed that over these years business environment, competitiveness and firm performance of Finnish SMEs are slowly deteriorating. Results from correlation analysis revealed that business environment, competitiveness and firm performance are positively correlated. However, the relationships between these variables are not consistent in respect to competitive priorities indicating a dynamic nature of cost, quality, time, and flexibility dimensions. Besides these findings our analysis acknowledged that to improve firm performance, irrespective to the choice of competitive priority, SMEs should pay more attention to their competitiveness rather than blaming the business environment. The paper concludes that simultaneous use of competitive priority dimensions might be more favorable as a source of competitiveness and competitive advantage to improve firm performance. However, the managers are encouraged to compare the results, findings and concepts presented in this paper among themselves and comprehend the specific answer to the question posed in the title.
    Źródło:
    Management and Production Engineering Review; 2016, 7, 1; 77-88
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Critical attributes on supply chain strategy implementation: case study in Europe and Asia
    Autorzy:
    Sillanpää, I.
    binti Abdul Malek, N. A.
    Takala, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/407456.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    supply chain management
    sense and respond
    strategy implementation
    Opis:
    This case study research aims to compare the performance of the implementation of supply chain management (SCM) strategies within Asian and European Companies. The case study measures company’s opinions of supply chain strategy implementation through utilization of Sense and Response methodology. Critical Factor Index (CFI), Balanced Critical Factor Index (BCFI) and Scaled Critical Factor Index (SCFI) are used in this study to represent the result of comparison between European and Asian companies. From the analysis of comparison of all Sense and Response models, it can be concluded that there are differences and similarities of critical attributes that affecting supply chain strategy implementation in Asian and European companies. There are two attributes that have consistent trend for both regions; innovation and organization structure. In this research the analysis of supply chain strategy implementation was made for the needs of manufacturing industry. Suggestions for future research are multiple case studies in different industry areas in global business environment. The results provide a guideline to the company to measure the right attributes for making the right decision in a dynamic environment. It also provides good knowledge for companies to implement supply chain strategies, the main approaches to implement it and the main challenges in supply chain strategy implementation. Supply chain strategy implementation was analyzed in the European and Asian companies. This research shows that there are several developing areas for companies when implementing supply chain strategies.
    Źródło:
    Management and Production Engineering Review; 2013, 4, 4; 66-75
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technological Properties of SiC-Based Ceramic Slurries for Manufacturing Investment Casting Shell Moulds
    Właściwości technologiczne mas lejnych na bazie SiC stosowanych do produkcji ceramicznych form odlewniczych
    Autorzy:
    Małek, M.
    Wiśniewski, P.
    Matysiak, H.
    Zagórska, M.
    Kurzydłowski, K.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/356553.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    binders
    investment casting
    polyvinyl alcohol
    SiC slurries
    shell mould
    spoiwa
    odlewanie
    alkohol poliwinylowy
    masa lejna
    forma odlewnicza
    Opis:
    In this work technological properties of ceramic slurries based on silicon carbide were characterized. Silicon carbide and poly(vinyl alcohol) in an amount 6%, 10% and 15 wt. % as a solution were added to prepare the ceramic slurries. Solid phase content in ceramic slurries was 62,5 wt.%. Plate weight test, pH, density, viscosity (measured by the Zhan 4# cup) and dynamic viscosity were investigated. Dipping test on wax model was done to measure adhesive properties. Characterization of SiC fillers powder was made by determination of grain size, density, chemical composition, Zeta potential and by use of scanning electron microscopy. Obtained results of ceramic slurries based on SiC meet standard specification in industrial investment casting and its properties are very promising for future application in investment casting of superalloys.
    W artykule przedstawiono wyniki badań właściwości technologicznych mas ceramicznych na osnowie SiC mogących znaleźć zastosowanie do produkcji form odlewniczych do odlewania precyzyjnego części turbin lotniczych. Zawiesiny ceramiczne z SiC o stężeniu 62,5% otrzymano w mieszadle mechanicznym z dodatkiem 6, 10, 15% wag. alkoholu poli(winylowego) spełniającego rolę spoiwa oraz upłynniacza. Przeprowadzono szereg badań materiałoznawczych dla proszku, polimeru oraz wytworzonych mas lejnych, w tym lepkość względną i dynamiczną, pomiar gęstości, pH oraz zanurzeniowy test płyty. Pomiary prowadzono przez 96h. Udowodniono, iż właściwości technologiczne oraz reologiczne ceramicznych mas pozwalają na zastosowanie ich do produkcji form odlewniczych przeznaczonych do procesów odlewania precyzyjnego części turbin lotniczych.
    Źródło:
    Archives of Metallurgy and Materials; 2014, 59, 3; 1059-1062
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Plasma Assisted Chemical Vapour Deposition – Technological Design Of Functional Coatings
    Chemiczne osadzanie z fazy gazowej wspomagane plazmowo – projektowanie technologii funkcjonalnych powłok
    Autorzy:
    Januś, M.
    Kyzioł, K.
    Kluska, S.
    Konefał-Góral, J.
    Małek, A.
    Jonas, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/350999.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    PACVD
    titanium
    aluminum alloys
    polyetheretherketone
    ceramic coatings
    chemiczne osadzanie z fazy gazowej wspomagane plazmowo
    tytan
    stopy aluminium
    polieteroeteroketon
    powłoki ceramiczne
    Opis:
    Plasma Assisted Chemical Vapour Deposition (PA CVD) method allows to deposit of homogeneous, well-adhesive coatings at lower temperature on different substrates. Plasmochemical treatment significantly impacts on physicochemical parameters of modified surfaces. In this study we present the overview of the possibilities of plasma processes for the deposition of diamond-like carbon coatings doped Si and/or N atoms on the Ti Grade2, aluminum-zinc alloy and polyetherketone substrate. Depending on the type of modified substrate had improved the corrosion properties including biocompatibility of titanium surface, increase of surface hardness with deposition of good adhesion and fine-grained coatings (in the case of Al-Zn alloy) and improving of the wear resistance (in the case of PEEK substrate).
    Metoda chemicznego otrzymywania warstw z fazy gazowej w warunkach plazmy (PA CVD – Plasma Assisted Chemical Vapour Deposition) umożliwia otrzymywanie homogenicznych struktur warstwowych w niskich temperaturach, o dobrej adhezji do podłoży. Warunki w jakich prowadzone są procesy plazmochemiczne w znacznym stopniu decydują o właściwościach fizykochemicznych modyfikowanych powierzchni. W pracy przedstawiono możliwości w zakresie projektowania procesów plazmochemicznych z otrzymaniem warstw DLC (Diamond-like Carbon) dotowanych atomami Si i/lub N. W zależności od rodzaju modyfikowanego podłoża uzyskano poprawę właściwości korozyjnych przy zachowaniu biokompatybilności powierzchni (w przypadku Ti Grade2), poprawę twardości powierzchni na drodze otrzymania drobnoziarnistej powłoki o dobrej adhezji do podłoża (w przypadku Al-Zn) i poprawę odporności na zużycie (w przypadku PEEK).
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2A; 909-914
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analyzing sustainable competitive advantage: strategically managing resource allocations to achieve operational competitiveness
    Autorzy:
    Malek, N. A.
    Shahzad, K.
    Takala, J.
    Bojnec, S.
    Papler, D.
    Liu, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/406814.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sustainable competitive advantage
    sustainable operations
    competitive priorities
    sense and respond
    manufacturing strategy index
    adaptive strategy
    Opis:
    In today’s dynamic business environment, a key challenge for all companies is to make adaptive adjustments to their manufacturing strategy. This study demonstrates the competitive priorities of manufacturing strategy in hydro-power case company to evaluate the level of sustainable competitive advantage and also to further analyze how business strategies are aligned with manufacturing strategies. This research is based on new holistic analytical evaluation of manufacturing strategy index, sense and respond, and sustainable competitive advantage models. These models help to describe, evaluate, and optimize resource allocation to meet the performance requirements in dynamic decision making. Furthermore, these models evaluate operational competitiveness for manufacturing strategies according to the multi-criteria priority. The results show that the adjustments of competitive priorities in manufacturing strategies by implementing the proposed holistic analytical models are helpful in strategically managing business operations. The discussion derives the most critical attributes in business operations while alignment of resource allocation with competitive priorities help to strategically focus those attributes. In conclusion, we argue that resource allocation and manufacturing strategies have become the most important capabilities in a business environment where companies focus to get a sustainable competitive advantage.
    Źródło:
    Management and Production Engineering Review; 2015, 6, 4; 70-86
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Validating performance based critical actions in a high tech start-up
    Autorzy:
    Vuoti, V. P.
    Takala, J.
    Mäntylä, A.
    Liu, Y.
    Yang, W.
    binti Abdul Malek, N. A.
    Kronman, P.
    Kreuzer, A.
    Zafar, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/406824.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sustainable competitive advantage
    sense and respond
    manufacturing strategy index
    operations strategy
    balanced critical factor index
    operations start up
    case study
    Opis:
    The objective of this study is to analyze a Finnish manufacturing case company’s operational competitiveness. A proposed analytical model based on analyses the corresponding angles of the strategic triangles (Prospector, Analyzer, and Defender). The model compares the angle differences between the strategy and resource triangles with opinions from different management groups of informants. It was found out that Normalized Scaled Critical Factor Index (NSCFI) model is more scientific comparing to formal ones through validation. Calculations based on the MSI questionnaire resulted in medium high values for the Prospector strategy both for past- and future orientation. S&R calculations regarding the past orientation resulted in low values for all strategy types, except P-NSCFI for Analyzer. Moreover this study covers a case, in where Balanced Critical Factor Index (BCFI) was used defining company annual strategy plan.
    Źródło:
    Management and Production Engineering Review; 2014, 5, 1; 74-86
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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