STRUCTURE-ANALYSIS OF DISPERSION STRENGTH ENING

In the paper direct and indirect strengthening contributions are compa red in the composite materials strengthened by particles. Low-temperat ure yield strength consisting of five additive constituents has two ma in contributions: an indirect strengthening constituent by subgrain, t hat is smaller than a direct one, resulting from the incoherent partic les-moving dislocations interaction. The type of microstructure (the d istribution of particles in the volume) strongly influences the direct strengthening contribution which is more pronounced in the case of un iformly random structure of the dispersed particles distribution.