Abstract
An integral fitting method has been developed to determine the phase transformation mechanism and to extract the kinetic parameters during the crystallization of amorphous alloys. The proper kinetic function of the phase transformation was firstly deduced. Theoretical differential scanning calorimetry curves were then calculated. All the kinetic parameters can be extracted by fitting the calculated differential scanning calorimetry curves to experimental data. We applied the integral fitting method to analyze the isochronal crystallization of the Ti 50Cu 42Ni 8 amorphous alloy. Results indicate that a transformation process considering impingement is more suitable to describe the crystallization kinetics of this alloy than using the traditional Johnson–Mehl–Avrami model. Mean values of the obtained kinetic parameters show strong heating rate dependence.
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