The influence of stress changes on the kinetics of crystallization of Fe_(75)Ni_2Si_8B_(13)C_2 amorphous alloy

摘要

The kinetic and thermal research of the crystallization process of Fe_(75)Ni_2Si_8B_(13)C_2 amorphous alloy was performed by DSC. Fe_(75)Ni_2Si_8B_(13)C_2 amorphous alloy was ribbon shaped and previously exposed to mechanical stress at 380, 500, and 650 MPa for 5 minutes. It was established that the enthalpy of crystallization decreased with increased stress. The kinetic parameters of the crystallization process were determined using Kissinger's method. It was shown that the alloy crystallized in three steps. The activation energies and rate constants were calculated for each step. Specific electrical resistance was measured during application of stress on the ribbons. It was shown that the specific electrical resistance increased when the stress was increased. It was also established that permanent increase of the specific resistance appeared after ceasing the stress.