Journal
SCRIPTA MATERIALIA
Volume 66, Issue 1, Pages 29-32Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.09.034
Keywords
Shape memory alloys (SMA); Dislocations; Twinning; Correspondence matrix
Categories
Funding
- National Science Centre of Poland [N507 321 640]
- AGH University of Science and Technology [11.11.180.255]
- Institute of Metallurgy and Materials Science of Polish Academy of Sciences, Krakow, Poland
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The transformation of perfect dislocation configurations during twin variant reorientation in Ni-Mn-Ga martensites was analyzed by means of the correspondence matrix method. It was found that the dislocations can change the length of the Burgers vectors remarkably, and hence increase the self-energy by several percent of their initial value. It is suggested that this may affect the mechanical condition of operation of the mechanism responsible for twin variant reorientation. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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