Journal
SCRIPTA MATERIALIA
Volume 68, Issue 12, Pages 988-991Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2013.02.053
Keywords
Mechanically driven annealing twin; Nanocrystalline Cu; Grain boundary migration; Cyclic deformation
Categories
Funding
- National Natural Science Foundation of China [50841024, 50890173, 50931005, 51101162]
- National Basic Research Program of China [2010CB631006]
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This investigation addresses a new finding on the formation of twins similar to 100-500 nm thick in nanocrystalline Cu during cyclic deformation. This twin formation is related to the emission of Shockley partials from extensively migrating grain boundaries. Given the similarities of formation mechanism and morphology to those observed during annealing, these twins were termed mechanically driven annealing twins. Moreover, the dynamic interactions between dislocations and twin boundaries were also explored, as these interactions may hinder the propagation of twins. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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