Image analisis study of matrix reinforcement interaction on AA6061/Ti-Al particle reinforced composites

摘要

In this paper is compared the stability of different contents of intermetallic particles (Ti_3Al and TiAl) in an aluminium alloy (AA6061). A powder metallurgy route combined with a secondary hot extrusion process, was followed to fabricate the composites. The matrix/ reinforcement interaction was enhanced by solubilization heat treatments at temperatures ranging form 470 to 530 deg C and times from 1 to 24 h. Scanning electron microscopy was employed to study the microstructure of the composites. The reaction layer thickness and its growing speed were determined by image analysis. The stoichiometric composition was obtained by dispersive energy diffraction of X ray.