Special Aspects of Structural-Phase Transformations in the CuZn Alloy Under Thermal Cycling

Abstract

Using the Monte Carlo approach, special features of structural and energy characteristics of β-brass are investigated under cycling conditions. As a result of the heating-cooling cycle, a unique hysteresis loop is observed, which suggests irreversibility of the processes and implies differences in the structural-phase states in the heating and cooling stages. An analysis of the atomic and phase structure of the system during heating and cooling, i.e., in the course of order–disorder and disorder–order phase transitions, has demonstrated that the system is found in different structural–phase states. Upon completion of the disorder–order phase transition, two domains of the B2 superstructure are formed.