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Stały URI dla kolekcjihttp://hdl.handle.net/11652/206

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20142

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  • Pozycja
    Effect of Temperature on Ausferritic Nodular Cast Iron Microstructure
    (2014) Gumienny, Grzegorz; Klimek, Leszek
    The work presents the results of the studies of the effect of the temperature on the microstructure of ausferritic nodular cast iron. The ausferrite in the matrix was obtained by way of a specific combination of molybdenum and copper. The cast iron underwent annealing at the temperatures of 520, 550 and 580°C. The work presents the effect of the annealing temperature on the fraction of austenite in the cast iron matrix. The annealed and non-annealed cast iron hardness is given. The work also proves that an increase in the temperature up to 580°C causes a drop in the cast iron hardness.
  • Pozycja
    Analysis of AM60 and AZ91 alloy crystallisation in ceramic moulds by Thermal Derivative Analysis (TDA).
    (2014) Rapiejko, Cezary; Pisarek, Bogusław; Czekaj, E.; Pacyniak, Tadeusz
    The work presents the test results of the crystallisation and cooling of magnesium alloys: AM60 and AZ91, with the use of the TDA method. The tested alloys were cast into ceramic shells heated up to 180 C, produced according to the technology of the shell production in the investment casting method. The TDA method was applied to record and characterize the thermal effect resulting from the phase transformations occurring during the crystallisation of magnesium alloys. The kinetics and dynamics of the thermal processes of the crystallisation of AM60 and AZ91 in the ceramic shells were determined. Metallographic tests were performed with the use of an optical microscope as well as scanning microscopy, together with the EDS chemical analysis of the phases present in the tested casts. A comparison of these test results with the thermal effect recorded by way of the TDA method was made.