FOURIER THERMAL ANALYSIS OF SOLIDIFICATION KINETICS IN MOLTEN ALUMINIUM AND IN PRESENCE OF ULTRASONIC FIELD

摘要

In this paper a comparison between the Newtonian and Fourier method analysis avail- able in thermal analysis techniques is reported. The experimental solidification of liquid aluminium under various conditions has been studied. Thermal analysis is a tool in elu- cidating the thermal events involved in liquid to solid transformation. The Newtonian method predicts a maximum in heat generation at the onset of solidification, while the Fourier method incorporates the effect of thermal gradient and predicts two heat gener- Ation peaks during the solidification process.