Formation of the Maximum Strength of Dispersion-Hardened Crystalline Aluminum-Based Alloys Containing Incoherent Particles

Mathematical modeling of the plastic deformation of dispersion-hardened crystalline aluminum-based alloys with incoherent particles is done with allowance for the evolution of defect structure. It is found that strength properties are considerably higher in materials with nanosized particles than in materials with larger particles at the same volume fraction of the strengthening phase. The emergence of dipole dislocation configurations in the defect system creates conditions for a considerable increase in flow stress.