Fabrication of a novel laser-processed NiTi shape memory microgripper with enhanced thermomechanical functionality

@article{Daly2013FabricationOA,
  title={Fabrication of a novel laser-processed NiTi shape memory microgripper with enhanced thermomechanical functionality},
  author={Matthew Daly and A. Pequegnat and Y. Norman Zhou and M Ibraheem Khan},
  journal={Journal of Intelligent Material Systems and Structures},
  year={2013},
  volume={24},
  pages={984 - 990}
}
The thermomechanical properties of nickel-titanium shape memory alloys have sparked significant research efforts seeking to exploit their exotic capabilities. Until recently, the performance capabilities of nickel-titanium devices have been inhibited by the retention of only one thermomechanical response. In this article, the application of a novel laser-processing technique is demonstrated to create a monolithic self-positioning nickel-titanium shape memory microgripper. Device actuation and… 
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TLDR
Results showed that surface defects, including increased roughness, crystallinity and presence of volatile oxide species, overshadowed any possible performance improvements from an increased Ti/Ni ratio or inclusion dissolution imparted by laser processing, but post-laser process mechanical polishing was shown to remove these defects and restore the performance, making it comparable to chemically etched NiTi material.
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