Abstract
Deformation twinning of B2 austenitic phase in NiTi has not been understood despite its significance. A number of experimental observations have been made, but these alone cannot explain the complex shears and shuffles that produce the twin. We propose that twinning can occur via (211) [111] shear and the proposed shuffle differs from previous work and is parallel to the twinning shear. We established a twin energy barrier which is lower compared the previously proposed twinning modes, and has a magnitude of 79 mJ/m2. Hydrostatic pressure is found to alter this energy barrier and the coupling of shear and shuffle mechanism.
Original language | English (US) |
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Article number | 241906 |
Journal | Applied Physics Letters |
Volume | 98 |
Issue number | 24 |
DOIs | |
State | Published - Jun 13 2011 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)