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    Wyświetlanie 1-4 z 4
    Tytuł:
    Synthesis of Inconel 718 Superalloy by Electric Current Activated Sintering
    Autorzy:
    Ergin, N.
    Ozdemir, O.
    Demirkiran, S.
    Sen, S.
    Sen, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401292.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Bx
    81.20.Ev
    81.40.Cd
    Opis:
    In the present study, the production of Inconel 718 nickel based superalloy was carried out in an electric current activated sintering in open air under a uniaxial pressure of 300 MPa using Al, Ni, Fe, Cr, Ti, Co, Fe-Nb and Fe-Mo powders. This alloy was heat treated, following the conventional treatment which consists of a 1 h solution treated at 980°C, followed by air cooling and double ageing, 8 h at 720°C, furnace cooling at 55°C/h down to 620°C and ageing for 8 h. Optical and SEM examinations showed a dense microstructure with low amount of porosity. XRD studies showed the existence of the γ and MC type carbide (M atom is a Nb, Ti combination) and δ phases. The relative density of sample measured according to Archimedes' principle was 93.7%, and the microhardness of sample was about 343.8 $HV_{0.1}$.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 1100-1102
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Properties of the Surface Alloyed AISI 1020 Steel with $Fe_{(15-x)}Mo_{x}B_5$ Alloy
    Autorzy:
    Abakay, E.
    Sen, S.
    Sen, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1292852.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    52.77.Fv
    81.40.Cd
    81.40.Ef
    81.05.Je
    81.40.-z
    Opis:
    It is now well established that considerable improvement in the mechanical/chemical properties of near surface regions of materials can be achieved by the process of surface alloying. In the present study, surface alloying treatment with molybdenum and boron on the surface of the AISI 1020 steel was realized by the technique of tungsten inert gas welding. Ferrous boron alloy and ferrous molybdenum were used for surface alloying treatment. Before the treatment, ferrous alloys were grinded and sieved to be smaller than 45 μm. Prepared powder was pressed on the steel substrate and melted by tungsten inert gas welding for surface alloying. Coated layers formed on the steel substrate were investigated using optical and scanning electron microscopy, X-ray diffraction analysis and Vickers microhardness testers. It was shown that surface alloyed layer has composite structure including steel matrix and well distributed boride phases. Borides formed in the coated layers have a small precipitated structure and distributed in the grain boundaries as continuous phases. X-ray diffraction analyses show that coated layers include $Fe_2B$, $Fe_{13}Mo_2B_5$, $Mo_2FeB_4$, and iron.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 584-586
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wear Properties of the Surface Alloyed AISI 1020 Steel with $Fe_{(15-x)}Mo_{x}B_5$ by TIG Welding Technique
    Autorzy:
    Abakay, E.
    Sen, S.
    Sen, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1292921.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.40.Cd
    81.40.Ef
    52.77.Fv
    81.05.Je
    81.40.Pq
    Opis:
    Surface alloying caused the improvement in the mechanical/chemical properties of near surface regions of the steels. In the present study, surface alloying treatment with boron, molybdenum, and iron on the AISI 1020 steel was realized by the technique of TIG welding. Ferrous boron, ferrous molybdenum, and Armco iron were used for surface alloying treatment. Before the treatment, ferrous alloys were ground and sieved to be smaller than 45 μm. The powders were mixed to be composed of $Fe_{(15-x)}Mo_{x}B_5$, where x = 1, 3, and 5 (by at.%). Prepared powders were pressed on the steel substrate and melted by TIG welding for surface alloying. Wear tests of the surface alloyed AISI 1020 steels were realized against WC-Co ball using by ball-on-disk method under the loads of 2.5, 5, and 10 N at the sliding speeds of 0.1 m/s for 250 m sliding distance. Friction coefficient and wear rates of the surface alloyed steel with $Fe_{(15-x)}Mo_{x}B_5$ alloy powder are changing between 0.30 and 0.80 and 5.86 × $10^{-5} mm^3$/m to 2.52 × $10^{-3} mm^3$/m depending on applied load and alloy composition, respectively.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 587-589
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wear Properties of the Surface Alloyed AISI 1020 Steel with Vanadium and Boron by TIG Welding Technique
    Autorzy:
    Abakay, E.
    Sen, S.
    Sen, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1215751.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    52.77.Fv
    81.40.Cd
    81.40.Ef
    81.05.Je
    81.40.-z
    81.40.Pq
    Opis:
    It is now well known that surface alloying caused improvement in the mechanical/chemical properties of near surface regions of materials. In the present study, surface alloying treatment with boron, vanadium and iron on the AISI 1020 steel was realized by the technique of TIG welding. Ferrous boron, ferrous vanadium and Armco iron were used for surface alloying treatment. Before the treatment, ferrous alloys were ground and sieved to be smaller than 38 μm. The powders were mixed to be composed of $Fe_{15 - x}V_{x}B_5$, where x = 1, 3, and 5 (by at.). Prepared powders were pressed on the steel substrate and melted by TIG welding for surface alloying. Coated layers formed on the steel substrate were investigated using scanning electron microscopy, X-ray diffraction analysis and Vickers microhardness testers. It was shown that the surface alloyed layer has a composite structure including steel matrix and eutectic borides. Wear tests of the surface alloyed AISI 1020 steels were realized against WC-Co ball using ball-on-disk method.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 251-253
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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