The correlation of microstructure, recrystallization texture and mechanical properties with second–phase content in Al/WO3/SiC hybrid nanocomposite during ARB process

Abstract

In the present work, the evaluation of microstructure, recrystallization texture with second–phase content in Al/WO3/SiC hybrid nanocomposite during accumulative roll bonding process was investigated by electron back scatter diffraction (EBSD) and analysis of orientation distribution function (ODF). The results showed that the density of nanoparticles played a critical role in the microstructural changes, recrystallization texture and mechanical properties. When the volume fraction of nanoparticles increases, the recrystallized grains are elongated in the rolling direction (RD) due to the Zener-pinning of nanoparticles at high angle grain boundaries and consequently the HAGBs spacing in the normal direction (ND) are constantly reduced. The texture intensity increased sharply with increasing the volume fraction of nanoparticles and eventually reached Fg = 27.23 for S3 nanocomposite. In addition, with development of recrystallization, the random texture in S1and S2 nanocomposites increased significantly. Also, the low intensity of the texture components in S1 and S2 specimen is clearly evident for all fibers. Furthermore, mechanical properties were measured for all specimens and results of the tensile strengths and elongation showed that with decreasing the volume fraction of reinforcing nanoparticles and increasing the volume fraction of recrystallized grains, the tensile strength and elongation were decreased and increased, respectively.