Deformation defects in nanocrystalline nickel |
| |
| Authors: | Xiaolei Wu En Ma Y T Zhu |
| |
| Affiliation: | (1) State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100080, P.R. China;(2) Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA;(3) Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA |
| |
| Abstract: | Defects induced by plastic deformation in electrodeposited, fully dense nanocrystalline (nc) Ni with an average grain size
of 25 nm have been characterized by means of high resolution transmission electron microscopy. The nc Ni was deformed under
uniaxial tension at liquid-nitrogen temperature. Trapped full dislocations were observed in the grain interior and near the
grain boundaries. In particular, these dislocations preferred to exist in the form of dipoles. Deformation twinning was confirmed
in nc grains and the most proficient mechanism is the heterogeneous nucleation via emission of partial dislocations from the
grain boundaries. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
