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    Wyświetlanie 1-7 z 7
    Tytuł:
    Impact of the type of quench aging after hyperquenching on the mechanical strength properties of AW-7020 alloy
    Autorzy:
    Hajdukiewicz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/247335.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    AW-7020 alloy
    age hardening
    natural aging
    artificial aging
    hyperquenching strength limit
    rupture elongation
    fracture area reduction
    intermediate state
    age process hardening
    Opis:
    The article attempts to determine the influence of selected types of the heat treatment on the strength properties of the AW-7020 alloy used in the shipbuilding industry. The text presents information on the applied types of heat treatment. There are presented the results of the static tensile test of the material after its earlier hyperquenching and aging (natural and artificial) as well as comparison to the test results of the alloy without heat treatment. To illustrate the nature of the supersaturation and aging process, a test was carried out for a series of samples in a transitional state. During the tests for all the samples were determined: elongation at rupture and reduction of area at fracture, strength limit Rm and proof stress Re0.2. The results of the tests showed that the choice of the type of aging after saturation has significant importance for the strength properties of the AW-7020 alloy. It has been shown that it is possible to significantly accelerate the achievement of higher strength properties of the tested alloy, replacing the natural aging of the material with artificial aging.
    Źródło:
    Journal of KONES; 2018, 25, 2; 141-148
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza porównawcza metod pomiarów wydłużenia w czasie wykonywania statycznej próby rozciągania metali
    Comparative Analysis of the Elongation Measurement Methods During Static Tension Testing of Metals
    Autorzy:
    Hajdukiewicz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/341615.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydawnictwo Uniwersytetu Morskiego w Gdyni
    Tematy:
    metale – próba rozciągania w temperaturze pokojowej ekstensometr wideo
    Zwick&Roell
    VideoXtens
    bezdotykowy pomiar wydłużenia
    wydłużenie procentowe po rozerwaniu A
    wydłużenie ekstensometryczne całkowite procentowe przy rozerwaniu At
    metals – tension testing at ambient temperature
    video extensometer
    non-contact elongation measurement
    extension ratio A and At
    Opis:
    W artykule przedstawiono porównanie wyników pomiarów wydłużenia próbek ze stopu AlMg3, uzyskanych dwiema metodami w czasie wykonywania próby rozciągania metali w temperaturze pokojowej zgodnie z normą PN-EN ISO 6892-1:2010 [Zwick&Roell 2015]. Metoda 1 – określenie wydłużenia za pomocą ekstensometru wideo firmy Zwick&Roell typ VideoXtens. Metoda 2 – określenie wydłużenia na podstawie podziału początkowego długości pomiarowej.
    In the article there are presented and compared elongation measurements of the metal specimens made of AlMg3 alloy. The specimens were obtained by 2 methods during performing the metal tension test at ambient temperature according to standard PN-EN ISO 6892-1:2010. The 1st method – elongation measurement with video extensometer VideoXtens-type of the Zwick&Roell company. The 2nd method – elongation measurement based on initial division of measurement length.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Gdyni; 2018, 105; 65-72
    1644-1818
    2451-2486
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Gdyni
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Production of composites with added waste polyester-glass with their initial mechanical properties
    Autorzy:
    Panasiuk, K.
    Hajdukiewicz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/135585.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    polyester-glass waste
    new composites
    new materials
    hand laminating
    static stretching test
    mechanical properties
    Opis:
    In this article the problem of plastic recycling, and in particular waste polyester-glass, has been described. In brief, the technology for the production of new composite materials by hand, made by the contact method, using the matrix filling in the form of polyester-glass waste coming from worn-out laminates used in the construction of ship hulls. The waste used was a powdered mixture of resin particles, glass fibers, and composite particle agglomerates. A method for producing composite panels with a recyclate content of between 10% and 30% was carried out. The samples were then manufactured according to the requirements of the standard, i.e. PN-EN ISO 527-4_2000P. Samples obtained from the test plates were subjected to a static stretch test, to verify the impact of the integrated wastes on the mechanical properties of the composite. Photographs of the structure of the obtained material have also been presented. These photos showed significant differences in the composition of the resulting composites determined by the amount of waste material used. Analysis of the results indicated that increasing the amount of recyclate reduces the value of the material’s strength limit and also reduces the plasticity of the material. This article has provided an introduction to more comprehensive research on the recycling of plastics.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 52 (124); 30-36
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the content of a glass-polyester recycled additive on the properties of layered composites in dynamic tests
    Autorzy:
    Panasiuk, K.
    Hajdukiewicz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/135154.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    polyester-glass waste
    recyclate
    new composites
    new materials
    hand laminating
    toughness
    Opis:
    Polyester-glass composites are widely used in many industries, in various types of constructions, including dynamically loaded ones. This article examines the influence of the content of a glass-polyester recycled additive on the strength properties of layered composites. The recyclate was polyester-glass waste, which was pre-crushed and then milled into the appropriate fractions. Manual laminating technology was used to make the materials. The composite materials were made with a waste content of 0%, 10%, 20% and granulations of ≥ 1.2 mm and ≥ 3 mm. Samples for testing were prepared in accordance with the PN-EN ISO 179-1: 2010E standard (Plastics – Charpy Impact Assessment – Part 1: Non-instrumental impact test). Impact tests of the samples were performed using the Charpy method with the Zwick Roell RKP450 swinging hammer. The test results showed that the addition of polyester-glass recyclate, its content %, and its granulation size, have an impact on the composite resistance to loads in dynamic tests.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2018, 56 (128); 36-40
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Możliwości wykorzystania mikroskopu elektronowego skaningowego w parazytologii
    Possibilities of use of scanning electron microscope in parasitology
    Vozmozhnosti ispolzovanija skaningovogo mikroskopa v parazitologii
    Autorzy:
    Hajdukiewicz, G.
    Karasek, M.
    Kurnatowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2165111.pdf
    Data publikacji:
    1976
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Źródło:
    Wiadomości Parazytologiczne; 1976, 22, 2; 115-119
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of granulation and content of polyester-glass waste on properties of composites
    Autorzy:
    Kyzioł, L.
    Panasiuk, K.
    Hajdukiewicz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/244947.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    recycling of composite
    polyester-glass waste
    tensile test
    strength properties
    Opis:
    Glass fibre reinforced composites are used in many branches of industry. Polyester-glass laminates serve as structural material in shipbuilding (e.g. hulls of units, superstructures), in railways, automotive (e.g. elements of car bodies and interior fittings, roofs of wagons, cisterns) or aviation (e.g. aircraft fuselages, fuel tanks, completion beaks and ballasts). Factors affecting the increase of their use include low specific gravity, optimal strength properties, corrosion resistance. This is associated with a large amount of post-production and post-use waste. The recycling problem of these materials remains unresolved. The article presents the technology of processing polyester-glass waste in order to obtain a recycle with a specific granulation. The selected technology for the production of layered composites with reinforcement in the form of recycle is described. For testing, granulation was selected for 1.2 and 3 mm, as well as content: 0%, 10%, 20% and 30%. Using the water-cutting method, samples were prepared according to the standard static tensile test for plastics. The tests were carried out using a universal testing machine as well as an extensometer for samples with granulation of 1.2 mm and 3 mm, as well as the selected recycled percentage. Obtained results of the research indicated that granulation as well as content affects the strength properties of composites. As the granulation increases, at the same content, the material gains less deformation. The increase in the amount of the recycle reduces the strength properties of the material, and also due to the decrease in the deformation value - the material becomes brittle.
    Źródło:
    Journal of KONES; 2018, 25, 4; 223-229
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Resistance to aging research in sea water composites with the polyester-glass recyclate
    Autorzy:
    Hajdukiewicz, G.
    Panasiuk, K.
    Kyzioł, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/949506.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    recycling
    polyester-glass recyclate
    aging of composites
    tensile test
    Opis:
    Composites are materials used for various types of constructions in the automotive industry, aviation, and shipbuilding. Due to the wide use of these materials, there is a problem with their recycling. Such material requires appropriate processing technology, which has been developed to obtain a recyclate with a specific granulation. The use of hand laminating technology made composites with the addition of polyester and glass recyclate with granulation of 1.2, as well as content: 0%, 20%, 30%. These types of materials are exposed to various types of atmospheric factors that affect their durability. Aging is defined as changes in the composite when exposed to atmospheric conditions, such as sunlight, temperature, thermal cycles, water in various forms and wind. This article uses recycled polyester and glass composites to investigate the effect of aging in seawater on their strength properties. These tests can be used to pre-assess the applicability of newly developed materials as construction or protective coatings. They were carried out on a specially prepared station for accelerated tests, with elevated temperature (35ºCC), as well as brine spray imitating sea atmosphere. The method is used to accelerate the aging processes occurring in composite materials. Samples were subjected to cycles of 5, 30 and 60 days respectively. Samples were weighed and measured before and after each cycle. In order to investigate the effect of aging on strength properties, the composites underwent a static tensile test in accordance with the standard for plastics. Studies have shown that as a result of the aging process, the strength properties decrease slightly, which affects the favourable assessment of these materials as constructional.
    Źródło:
    Journal of KONES; 2018, 25, 3; 219-225
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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