期刊
ACTA MATERIALIA
卷 60, 期 18, 页码 6413-6420出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2012.08.028
关键词
Deformation twinning; Single crystals; Critical resolved shear stress; Fcc reversible twinning
资金
- National Centre of Science of Poland [N507 321 640, 2011/03/D/ST8/04017]
- AGH University of Science and Technology, Krakow, Poland
The reverse mode of face-centered cubic (fcc) deformation twinning is found to be responsible for the formation of kink bands during compression of pre-twinned Cu-8.5 at.% Al single crystals. The formation of kink bands is described, and a very high level of activity of the reverse fcc twinning is established. It is also found that the reverse twinning is driven at a critical resolved shear stress lower by well over factor of 2 in comparison with the direct twinning mode operating in Cu-8.5 at.% Al single crystals during primary tensile deformation. This discovery of the reversible plastic mode of fcc twinning should find important application in the theory and modeling of large plastic deformations of fcc materials, including cyclic deformation phenomena. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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