|Number of page(s)||5|
|Section||Applied Research and Applications: Testing and Modelling|
|Published online||01 September 2009|
Influence of comp ound twinning on Young’s moduli in NiTi martensitePetr 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