**Heat Effects Occurring in the Supercooled Liquid State and Upon Crystallization of Metallic Glasses as a Result of Thermally Activated Evolution of Their Defect Systems**

**Andrei Makarov 1,†, Gennadii Afonin 1,\*,†, Yurii Mitrofanov 1,† and Nikolai Kobelev 2,† and Vitaly Khonik 1,†**


Received: 20 February 2020; Accepted: 19 March 2020; Published: 24 March 2020

**Abstract:** We show that the kinetics of endothermal and exothermal effects occurring in the supercooled liquid state and upon crystallization of metallic glasses can be well reproduced using temperature dependences of their shear moduli. It is argued that the interrelation between the heat effects and shear modulus relaxation reflects thermally activated evolution of interstitial-type defect system inherited from the maternal melt.

**Keywords:** metallic glasses; heat effects; shear modulus; defects
