Evolution of Residual Stresses and Fracture in Thermomechanically Loaded Particle-Reinforced Metal Matrix Composites
Р. Р. Балохонов, A. S. Kulkov, A. V. Zemlyanov, В. А. Романова, Е. П. Евтушенко, Diana Gatiyatullina, С. Н. Кулъков
Abstract
This work studies the formation and evolution of residual stresses in metal matrix composites with different volume fractions and sizes of reinforcement particles. The investigation was performed on hot-pressed samples of pure aluminum with boron and titanium carbide particles. The samples were subjected to mechanical compression tests to study their fracture behavior. Residual stresses were measured after cooling, as well as at different degrees of deformation of the composites. Some samples were subjected to electron beam processing. The phase composition and size of boron carbide particles in their recast surface layers, which were formed by recrystallization from the liquid phase during irradiation, were examined by X-ray diffraction. The cooling process followed by mechanical loading of the composites was simulated by simultaneously taking into account the fracture of the matrix and particles. The formation of residual stresses in composites with different particle volume fractions was numerically investigated.