Investigation of Thermal Hardening of the FCC Material Containing Strengthening Particles with an L12 Superstructure

Abstract

UDC 539.37 A mathematical model of plastic deformation of dispersion-hardened materials with an fcc matrix containing strengthening particles with an L12 superstructure having a coherent relationship with the matrix is presented. The model is based on the balance equations of deformation defects of different types with taking into account their transformation during plastic deformation. The influence of scale characteristics of the hardening phase, temperature, and deformation rate on the evolution of the dislocation subsystem and strain hardening of an alloy with an fcc matrix hardened by particles with an L12 superstructure is studied. A temperature anomaly of mechanical properties is found for the materials with different fcc matrices (Al, Cu, Ni). It is shown that the temperature anomaly is more pronounced for the material with larger volume fraction of the hardening phase.