TESTING PHASE CHANGES IN Al-Si ALLOYS WITH APPLICATION OF THERMAL ANALYSIS AND DIFFERENTIAL CALORIMETRIC ANALYSIS

摘要

The paper presents enthalpy of melting and solidification of casting aluminium alloys AISi6,AISi12 and AlSil 8 during heating and cooling. Calorimetric measurements preceded by tests of thermal analysis ATD were conducted on high-temperature scanning calorimeter multi HTC. A direct method was used for determining parameters of high-temperature processes and enthalpies occurring in phase changes. This method allowed for precise determining of endothermic and exothermic phase changes and, on their basis, the characteristic parameters of solidification necessary to assess the thermal endurance were marked.