Vibrodeformation properties of construction, composite, and high-porosity sintered materials

The indices of ultimate cyclic strain ε₋₁ and vibrodeformability R_ε (as the product of ε₋₁ and the decrement of material vibrations at this level of deformation) are introduced. Data on the fatigue strength and vibration decrement of traditional structural materials based on titanium, aluminum, magnesium, iron, and copper, as well as composite condensed materials of microlaminate and dispersion-strengthened structure and sintered high-porous materials based on copper powders, fibers, and foamed copper are analyzed. This allowed us to establish advantages of sintered high-porous materials in comparison with compact ones, and to conclude that high-porous materials based on discrete fibers, and foamed metals based on traditional structural materials will have higher ε₋₁ and R_ε indices than those of compact matrices. As far as the index of vibrostrength R_σ is concerned, sintered high-porous materials will be inferior to the compact materials. __________ Translated from Poroshkovaya Metallurgiya, Nos. 7–8(450), pp. 87–98, July–August, 2006.