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- Title
Deformation Twinning in Bulk Nanocrystalline Metals: Experimental Observations.
- Authors
Zhu, Y. T.; Liao, X. Z.; Wu, X. L.
- Abstract
Deformation twins have been observed in nanocrystalline (nc) fcc metals with medium-to-high stacking fault energies such as aluminum, copper, and nickel. These metals in their coarse-grained states rarely deform by twining at room temperature and low strain rates. Several twinning mechanisms have been reported that are unique to nc metals. This paper reviews experimental evidences on deformation twinning and partial dislocation emissions from grain boundaries, twinning mechanisms, and twins with zero-macro-strain. Factors that affect the twinning propensity and recent analytical models on the critical grain sizes for twinning are also discussed. The current issues on deformation twinning in nanocrystalline metals are listed.
- Subjects
TWINNING (Crystallography); CRYSTAL defects; SEMICONDUCTOR nanocrystals; NANOCRYSTALS; CRYSTAL grain boundaries; CRYSTALLOGRAPHY
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2008, Vol 60, Issue 9, p60
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-008-0120-1