| Numéro |
J. Phys. IV France
Volume 112, October 2003
|
|
|---|---|---|
| Page(s) | 769 - 772 | |
| DOI | https://doi.org/10.1051/jp4:2003995 | |
J. Phys. IV France 112 (2003) 769
DOI: 10.1051/jp4:2003995
In situ TEM study of the shape recovery process in predeformed NiTi shape memory alloy
Z. Xie1, Y. Liu2 and E. Stach31 School of Materials Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798
2 School of Mechanical and Production Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798
3 The National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Califomia, U.S.A.
Abstract
Shape recovery of pre-deformed martensitic NiTi shape memory alloy was studied by TEM during insitu heating up to 300°C, a
temperature significantly higher than the
temperature of the same material in bulk. Special attention has been paid to the microstructure variation upon subsequent
heating and cooling. It is found that, although both forward and reverse phase transformations have taken place, the morphology
of pre-deformed microstructure remains unchanged. The subsequently formed martensite upon re-cooling to room temperature consists
of no lattice twins.
© EDP Sciences 2003