Journal
ACTA MATERIALIA
Volume 81, Issue -, Pages 1-8Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2014.08.013
Keywords
Twinning; Rhenium; Mechanical behavior; Electron backscatter diffraction; Transmission electron microscopy
Funding
- US Office of Naval Research [N00014-11-1-0886]
- US Department of Energy [DE-AC02-05CH11231]
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The mechanical behavior of pure rhenium was investigated using uniaxial compression tests, transmission electron microscopy and electron backscatter diffraction characterization. The plasticity was characterized by a large amount of twin formation and propagation, including twin transmission across grain boundaries. In-depth analysis of the interactions of {1 1 (2) over bar 1}<(1) over bar (1) over bar 2 6 > twins with grain boundaries found that grain boundaries with misorientation angles below similar to 25 degrees allowed twin transmission, while grain boundaries with higher angles did not. Similar to dislocation interactions with grain boundaries, twin transmission was largely dictated by the minimization of the angle between the shear vectors of the incoming and outgoing twins. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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