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Proceedings Paper

Laser shock wave assisted patterning on NiTi shape memory alloy surfaces
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Paper Abstract

An advanced direct imprinting method with low cost, quick, and less environmental impact to create thermally controllable surface pattern using the laser pulses is reported. Patterned micro indents were generated on Ni50Ti50 shape memory alloys (SMA) using an Nd:YAG laser operating at 1064 nm combined with suitable transparent overlay, a sacrificial layer of graphite, and copper grid. Laser pulses at different energy densities which generates pressure pulses up to 10 GPa on the surface was focused through the confinement medium, ablating the copper grid to create plasma and transferring the grid pattern onto the NiTi surface. Scanning electron microscope (SEM) and optical microscope images of square pattern with different sizes were studied. One dimensional profile analysis shows that the depth of the patterned sample initially increase linearly with the laser energy until 125 mJ/pulse where the plasma further absorbs and reflects the laser beam. In addition, light the microscope image show that the surface of NiTi alloy was damaged due to the high power laser energy which removes the graphite layer.

Paper Details

Date Published: 17 February 2017
PDF: 5 pages
Proc. SPIE 10092, Laser-based Micro- and Nanoprocessing XI, 1009221 (17 February 2017); doi: 10.1117/12.2252543
Show Author Affiliations
Dovletgeldi Seyitliyev, Western Kentucky Univ. (United States)
Peizhen Li, Univ. of Kentucky (United States)
Khomidkhodza Kholikov, Western Kentucky Univ. (United States)
Byron Grant, Western Kentucky Univ. (United States)
Haluk E. Karaca, Univ. of Kentucky (United States)
Ali O. Er, Western Kentucky Univ. (United States)

Published in SPIE Proceedings Vol. 10092:
Laser-based Micro- and Nanoprocessing XI
Udo Klotzbach; Kunihiko Washio; Rainer Kling, Editor(s)

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