Insights into the microstructural parameters and mechanical property correlation of Al3Ti phase reinforced Al based nanocomposites

Abstract

AbstractVariations in the microstructural properties of Al/Al3Ti nanocomposites, prepared through stir casting technique were examined by x‐ray diffraction analysis using modified Warren Averbach and modified Williamson method. The study revealed that screw dislocations are predominantly generated in the nanocomposites, which contain higher volume percent of Al3Ti. However, at lower Al3Ti content, the finer intermetallic particulates during rolling, are displaced from their initial position, which lead to decrease in percent screw dislocation and subsequent increase in percent edge dislocation. Evolution of the different microstructural features in the nanocomposites were related to the variations in the composition. Textural studies were carried out to understand the effect of compositional variation on the microstructure and properties of the nanocomposites. It has been found that due to the presence of high strain, Brass type structure and the γ fiber are predominant texture component in the nanocomposites. The contribution of microstructure and microstructural parameters, e. g. dislocation density, dislocation type and textural characteristics along with the fractographical analysis were shown to have links with the mechanical properties of the nanocomposites