Journal
MATERIALS LETTERS
Volume 180, Issue -, Pages 47-50Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2016.05.098
Keywords
Metals and alloys; Microstructure; Nanocrystalline; Twinning; Hexagonal close-pack
Funding
- National Natural Science Foundation of China [51475375]
- Fund of the State Key Laboratory of Solidification Processing in NWPU [KP201305]
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Twinning behavior of nanocrystalline hexagonal close-packed titanium in Ti-6Al-4V subjected to severe plastic deformation was investigated. High-resolution transmission electron microscopy observations first showed that the deformation twinning of nanocrystalline hexagonal close-packed titanium was induced. The occurrence of deformation twinning was attributed to the extremely high stress due to specific grain orientations and the large strain rate. The twinning mechanism of nanocrystalline hexagonal close-packed titanium in Ti-6Al-4V was the overlapping of two stacking fault ribbons. This study provided a new thinking that it might be possible to design nanocrystalline titanium and its alloys to extensively activate twinning for further improving their properties. (C) 2016 Elsevier B.V. All rights reserved.
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