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  4. Laser annealing of amorphous NiTi shape memory alloy thin films to locally induce shape memory properties
 
research article

Laser annealing of amorphous NiTi shape memory alloy thin films to locally induce shape memory properties

Wang, X.
•
Bellouard, Yves  
•
Vlassak, J.J.
2005
Acta Materialia

We present the results of a crystallization study on NiTi shape memory thin films in which amorphous films are annealed by a scanning laser. This technique has the advantage that shape memory properties can be spatially distributed as required by the application. A kinetics study shows that nucleation of the crystalline phase occurs homogenously in the films. Consequently, the laser annealing process produces polycrystalline films with a random crystallographic texture. The crystallized films have a uniform microstructure across the annealed areas. The material in the crystalline regions transforms reversibly to martensite on cooling from elevated temperature and stress measurements show that a significant recovery stress is achieved in the films upon transformation.

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Type
research article
DOI
10.1016/j.actamat.2005.07.022
Author(s)
Wang, X.
Bellouard, Yves  
Vlassak, J.J.
Date Issued

2005

Publisher

Elsevier

Published in
Acta Materialia
Volume

53

Issue

18

Start page

4955

End page

4961

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
GALATEA  
Available on Infoscience
July 20, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/116386
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