Abstract
The texture evolution of Ti/Al2O3 nanocomposite fabricated using friction stir processing (FSP) was investigated at both macroscopic and microscopic levels employing X-ray diffraction and electron backscattering diffraction techniques. The developed textures were compared with ideal shear textures of hexagonal close-packed (hcp) structure, revealing that the fabricated nanocomposite is dominated by the P 1 hcp (fiber \( \{ 10\bar{1}1\} \langle 1\bar{2}10\rangle \) (and relatively weak B (fiber \( \{ 10\bar{1}1\} \langle \bar{1}\bar{1}23\rangle \)) textures. The analyses of macro- and microtextures showed that the presence of nanosized Al2O3 particles activated the pyramidal \( \{ 10\bar{1}1\} \langle \bar{1}\bar{1}23\rangle \) slip system in addition to dominant \( \{ 10\bar{1}0\} \langle 1\bar{2}10\rangle \) prism, basal \( \left\{ {0002} \right\}\langle 1\bar{2}10\rangle, \) and pyramidal \( \{ 10\bar{1}1\} \langle 1\bar{2}10\rangle \) slip systems which normally govern plastic deformation during FSP of commercially pure titanium alloy. Moreover, the presence of nanoparticles promoted the occurrence of continuous dynamic recrystallization as well as increasing the fraction of high-angle grain boundaries within the developed microstructure.
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Partial financial support by the Center of Excellence for Surface Engineering and Corrosion Protection of Industries, University of Tehran, University of Waterloo, and Iran Nanotechnology Initiative Council are gratefully acknowledged.
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Manuscript submitted April 8, 2016.
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Shafiei-Zarghani, A., Kashani-Bozorg, S.F. & Gerlich, A.P. Texture Analyses of Ti/Al2O3 Nanocomposite Produced Using Friction Stir Processing. Metall Mater Trans A 47, 5618–5629 (2016). https://doi.org/10.1007/s11661-016-3719-9
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DOI: https://doi.org/10.1007/s11661-016-3719-9