Effect of TiO2 Nanoparticles Addition on the Mechanical and Structural Properties of Al-4 wt.% Ag Alloy

Abstract

The effect of 0.1 wt. % nano- sized TiO2 particles on the mechanical and structural properties of Al -4 wt.% Ag alloy is investigated. Steady state creep of both alloys is studied under different constant stresses ranging from 12.75 to 15.3 MPa near the transformation temperature. The strain rate of the steady state creep is found to be maximum at 623 K for both alloys. The strain rate sensitivity parameter m changes from 0.18 to 0.25 for alloy A, and from 0.08 to 0.095 for alloy B which points to a dislocation slipping mechanism. The activation energies of the steady state creep are 130 and 125 KJ/mole For alloy A and B at low temperature region characterizing a solute diffusion of Ag in Al, the activation energies 135 and 130 KJ/mole For alloy A and B at high temperature region characterizing grain boundary diffusion of Al atoms..