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    Wyświetlanie 1-4 z 4
    Tytuł:
    Behavior of Steel Branch Connections during Fatigue Loading
    Autorzy:
    Sládek, A.
    Patek, M.
    Mičian, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/353905.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    branch connection
    stress analysis
    fatigue bending test
    Opis:
    Fatigue behavior of the branch connection made of low-alloyed steel with yield stress of 355 MPa during low-cycle bending test is investigated in the article. Numerical prediction of the stress and strain distribution are described and experimentally verified by fatigue test of the branch connection sample. Experimental verification is based on low-cycle bending testing of the steel pipes welded by manual metal arc process and loaded by external force in the appropriate distance. Stresses and displacement of the samples induced by bending moment were measured by unidirectional strain gauges and displacement transducers. Samples were loaded in different testing levels according to required stress for 2.106 cycles. Increase of the stress value was applied until the crack formation and growth was observed. Results showed a high agreement of numerical and experimental results of stress and displacement.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 3; 1597-1601
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Recast Layer on the Fatigue Life of Ti6Al4V Processed by Electric Discharge Machining
    Autorzy:
    Eakambaram, A.
    Xavior, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/356372.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Ti6Al4V
    EDM
    recast layer
    fatigue
    residual stress
    Opis:
    In this research work, Ti6Al4V alloy material was subjected to electric discharge machining (EDM) and its fatigue life was investigated at low cycle fatigue mode. In order to evaluate the influence of recast layer generated during the machining process on the fatigue life, samples prepared using end milling process were also subjected to similar tests and a comparative analysisis presented. Data were observed in the fully reversed fatigue mode at room temperature using samples fabricated as per ASTM standard E606. The specimen were machined on a spark electric discharge die sink machine which were subjected to fatigue, and the recorded fatigue lives were compared with the fatigue life of end milled specimen. The machined surfaces were examined through optical and scanning electron microscopes, and the roughness was measured with a standard profilometer. It was observed that when the discharge current is augmented, the recast layer formed was in the range of 20 to 70 μm thick. From the results, it is being concluded that fatigue life of the samples fabricated by EDM is less for various load conditions when compared with that of the end milled sample. The milled sample at 160 MPa load exhibited 2.71×105 cycles, which is 64% more when compared to EDM sample.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 4; 1541-1548
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fatigue and Corrosion Fatigue of 18Ni Maraging Steel
    Autorzy:
    Yongmei, Zhu
    Junjie, Chen
    Wenxian, Tang
    Weicheng, Cui
    Xiaorong, Wang
    Fang, Wang
    Baoji, Yin
    Powiązania:
    https://bibliotekanauki.pl/articles/2049667.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    corrosion fatigue
    18Ni (250)
    loading frequency
    stress ratio
    3.5%NaCl solution
    Opis:
    This study focused on the fatigue and corrosion fatigue of maraging steel 18Ni (250). The 18Ni (250) samples were tested for axial fatigue in air and 3.5% NaCl solution. The effects of loading frequency and stress ratio on the fatigue strength of 18Ni (250) were studied. in air, the loading frequency was 10 Hz, and the stress ratio was 0.5. however, three loading methods were used in the 3.5% NaCl solution: (i) the loading frequency of 1 Hz and stress ratio of 0.5; (ii) the loading frequency of 1 Hz and stress ratio 0.1, and (iii) the loading frequency 5 Hz and stress ratio 0.5. The corrosion fatigue strength of samples in the 3.5% NaCl solution was 63.3% lower than that of the samples in air. The fractures in the samples were observed after the test.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 2; 381-390
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fatigue and Corrosion Fatigue of 18Ni Maraging Steel
    Autorzy:
    Yongmei, Zhu
    Junjie, Chen
    Wenxian, Tang
    Weicheng, Cui
    Xiaorong, Wang
    Fang, Wang
    Baoji, Yin
    Powiązania:
    https://bibliotekanauki.pl/articles/2049558.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    corrosion fatigue
    18Ni (250)
    loading frequency
    stress ratio
    3.5%NaCl solution
    Opis:
    This study focused on the fatigue and corrosion fatigue of maraging steel 18Ni (250). The 18Ni (250) samples were tested for axial fatigue in air and 3.5% NaCl solution. The effects of loading frequency and stress ratio on the fatigue strength of 18Ni (250) were studied. In air, the loading frequency was 10 Hz, and the stress ratio was 0.5. However, three loading methods were used in the 3.5% NaCl solution: (i) the loading frequency of 1 Hz and stress ratio of 0.5; (ii) the loading frequency of 1 Hz and stress ratio 0.1, and (iii) the loading frequency 5 Hz and stress ratio 0.5. The corrosion fatigue strength of samples in the 3.5% NaCl solution was 63.3% lower than that of the samples in air. The fractures in the samples were observed after the test.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 321-330
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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