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    Wyświetlanie 1-3 z 3
    Tytuł:
    Dawne zbiory Uniwersytetu Lwowskiego jako część cyfrowego GLAM
    Former archives of the University of Lviv as part of the digital GLAM
    Autorzy:
    Sojka-Mastalerz, Helena
    Szala, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/2154687.pdf
    Data publikacji:
    2022-05-27
    Wydawca:
    Uniwersytet Warszawski. Wydział Dziennikarstwa, Informacji i Bibliologii
    Tematy:
    digital object
    digitization
    Lviv
    International Image Interoperability Framework (IIIF)
    Virtual Transcription Laboratory (WTL)
    obiekt cyfrowy
    digitalizacja
    Lwów
    Wirtualne Laboratorium Transkrypcji (WTL)
    Opis:
    The subject of the analysis are archival materials collected in two descriptions, constituting personal matters of employees of the former University of Lviv (Archival description of the 5th team 26 and archival description of the 1st team P-119). Digital copies of these resources are part of the digital GLAM, digital services created at the University of Wrocław, based on the cooperation of various institutions (archives, libraries, museums and archives) that make their digital collections available using a standardized description and presentation. Institutions that are part of GLAM use in the digital space, among others the IIIF standard (International Image Interoperability Framework), a standard that enables dynamic sharing of digitized digital objects, as well as the Virtual Transcription Laboratory (WLT), a cloudbased tool that allows you to create a text layer as a result of automatic recognition (OCR) or by manualy transcription tools. The article presents both tools, intended to create digital text based on scans, which can then be used to prepare digital objects in various standards: eBook, TEI and in others digital scientific tools.
    Źródło:
    Z Badań nad Książką i Księgozbiorami Historycznymi; 2022, 1; 123-136
    1897-0788
    2544-8730
    Pojawia się w:
    Z Badań nad Książką i Księgozbiorami Historycznymi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparing of Microhardness of the Stellite 6 Cobalt Alloy Implanted with 175 keV Mn+ Ions and 120 keV N+ Ions
    Autorzy:
    Kamiński, Mariusz
    Budzyński, Piotr
    Szala, Mirosław
    Turek, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/103323.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    ion implantation
    Stellite 6
    microhardness
    cobalt alloy
    implantacja jonów
    Stellit 6
    mikrotwardość
    stop kobaltu
    Opis:
    Nowadays, high-precision machines require lightweight materials with very high strength. Ion implantation is used to improve the mechanical strength of the material. A further paper presents the influence of manganese and nitrogen ion implantation on changes of microhardness of the surface layer of cobalt alloy. Samples were analyzed with the SEM-EDS Phenom ProX microscope. Microhardness was assessed with the Vickers method, and the loads of 1 gf (0.00981 N) and 5 gf (0.049 N) was applied using a FM-800 from Future-Tech microhardness meter. At a load of 1 gf, the penetration depth of the implanted specimens was reached not exceeding 0.5 um. At this depth, all samples showed an increase in microhardness compared to the unimplanted sample. The highest increase in microhardness was achieved after implantation of Mn ions with dose D=1∙1017 Mn+/cm2 and energy E=175 keV. The increased load on the indenter to 5 gf reduced the microhardness differences between implanted and unimplanted samples.
    Źródło:
    Advances in Science and Technology. Research Journal; 2019, 13, 3; 179-185
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of ageing heat treatment temperature on the properties of DMLS additive manufactured 17-4PH steel
    Autorzy:
    Świetlicki, Aleksander
    Wlaczak, Mariusz
    Szala, Mirosław
    Turek, Marcin
    Chocyk, Dariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/27311463.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    17-4PH steel
    precipitation hardening
    additive manufacturing
    heat treatment
    nanohardness
    utwardzanie wydzieleniowe
    produkcja dodatkowa
    obróbka cieplna
    nanotwardość
    stal 17-4 PH
    Opis:
    Additive manufacturing (AM) is a modern, innovative manufacturing method that enables the production of fully dense products with high mechanical properties and complex shapes that are often impossible to obtain by traditional methods. The 17-4PH grade steel is often applied where high mechanical performance is required. 17-4PH, or AISI 630, is intended for precipitation hardening, an operation that combines solution and ageing treatments and is used to significantly change the microstructure of the steel and enhance its mechanical properties. This study investigates the effect of precipitation hardening on the properties of 17-4PH steel. To examine microstructure and morphology, metallographic tests were performed together with phase composition and chemical composition analyses. Mechanical parameters were determined via Vickers hardness testing and the Oliver-Pharr method. Samples were fabricated using direct metal laser sintering (DMLS), which is one of the powder bed fusion methods. The use of a constant solution treatment temperature of 1040_C and different ageing temperatures made it possible to evaluate the effects of ageing temperature on the mechanical properties and microstructure of 17-4PH. The presence of face-centered cubic FCC g-austenite and body-centerd cubic BCC a-martensite structures were detected. The tests revealed that – similarly to the wrought material – the highest hardness of 382_10:3 HV0:2 was obtained after ageing at 450_C. The nanoindentation test showed the same H/E ratio for the sample after fabrication and after solution treatment at 0.016769, but this value increased after ageing to 127–157.5%. The sample aged at 450_C was characterized by the highest H/E ratio of 0.026367, which indicates the highest wear resistance of this material under employed treatment conditions. In general, the sample treated at 450_C showed the best performance out of all tested samples, proving to have the smallest grain size as well as high Vickers and nanoindentation hardness. On the other hand, the use of solution treatment led to reduced hardness and improved workability of the AM material.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 4; art. no. e146237
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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