Atomic transformation in tetragonal CuPt alloy under uniaxial tension at low temperature

Abstract

In the paper feature of atomic transformation was considered in CuPt alloy during dynamic deformation. Characteristics were studied for different stages: from primary tension to beginning of slip till crystal rupture. the transformation of atomic planes displacements and defects forming during tension has been studied. The investigation was revealed three main deformation processes at velocity 20 m/s and temperature 300 K, Quasi-elastic deformation, slipping and alloy fracture. Every stage is characterized by behavior of stored energy curve and some types of defects appearance. Vacancies, Frenkel pairs and interstitial atoms were found during first stage. Atomic displacement, dislocation, antiphase boundary and grain boundary forming were occurred during second stage. During third stage twins creation from grain boundaries has occurred.