Influence of electrical treatment on temperature dependent crystallization behavior of Ti-based metallic glass

Metallic glass (MG) has shown wide application potential due to their unique structure and excellent mechanical properties. Electrical treatment can induce structural changes in MG, thereby affecting their mechanical properties and thermal stability. In this work, Ti₃₇Zr_9.3Cu_46.3Sn_2.4Ni₅ MG was prepared by copper mold casting method. The temperature dependent crystallization behavior of the alloy during continuous heating was studied using differential scanning calorimetry, and the effect of electrical treatment on the crystallization kinetics was analyzed. After electrical treatment, the characteristic temperatures of Ti₃₇Zr_9.3Cu_46.3Sn_2.4Ni₅ MG significantly increased. The supercooled liquid phase region of the as-cast alloy is 33.3 K, while the value increased by 15.4 K after electrical treatment. The apparent activation energy of MG before and after electrical treatment was calculated based on the Kissinger method. The crystallization initiation activation energy E_x of the as-cast alloy is 203.1 kJ/mol, and the crystallization peak activation energy E_p is 187.2 kJ/mol. The activation energy values significantly increase after electrical treatment. The Doyle method was used to calculate the local activation energy of MG before and after electrical treatment, and the local activation energy gradually decreases with the increase of crystallization volume fraction during the crystallization process. Under the same crystallization volume fraction, the localized activation energy of the alloy after electrical treatment is significantly higher than that of the as cast alloy. The thermal stability of Ti₃₇Zr_9.3Cu_46.3Sn_2.4Ni₅ MG has been improved induced by electrical treatment.