Open Access
Article Number 06039
Number of page(s) 5
Section Applied Research and Applications: Testing and Modelling
Published online 01 September 2009
ESOMAT 2009, 06039 (2009)
DOI: 10.1051/esomat/200906039

Influence of comp ound twinning on Young’s moduli in NiTi martensite

Petr Šesták1, Miroslav Černý1 and Jaroslav Pokluda1

1  Institute of Physical Engineering, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic

Published online: 1 September 2009

NiTi shape memory alloy has been widely used in many engineering applications (e.g. mechatronic devices, medical tools, seismic sensors etc.). In this work, the Young’s moduli of twinned NiTi martensite in selected crystallographic directions are calculated from first principles and compared with previous data for perfect (untwinned) NiTi structure. The obtained results show that the selected twinning mode does not have a significant influence on the Young’s moduli and, thus, their reduction observed in some experiments is probably caused by changes in martensitic microstructure (arrangement of twinning variants).

© Owned by the authors, published by EDP Sciences 2009