Femtosecond laser micromachining (FLM) is a relatively new and promising technology for the micromachining of a wide spectrum of engineering materials with micron and submicron size features. The interaction mechanism of femtosecond laser pulses with matter is not the same as that found in traditional lasers. This manuscript presents a detailed study of the ablation characteristics of a nickel-titanium (NiTi) shape memory alloy in air with femtosecond laser pulses. The single- and multishot ablation threshold fluence and the incubation coefficient (predicting the extent to which accumulation could take place in a material) are evaluated. In addition, morphological changes, such as the emergence of a ripple pattern, are discussed along with the identification of gentle and strong ablation phases. This study provides for the understanding and characterization of NiTi micromachining using FLM technology, which could aid in the identification of new applications for smart materials in the macro-, nano-, and microelectromechanical system domains using this technology.
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e-mail: shiakolas@uta.edu
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June 2008
Special Section: Micromanufacturing
Micromachining Characteristics of NiTi Based Shape Memory Alloy Using Femtosecond Laser
Nitin Uppal,
Nitin Uppal
Department of Mechanical and Aerospace Engineering,
The University of Texas at Arlington
, Arlington, TX 76019
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Panos S. Shiakolas
Panos S. Shiakolas
Department of Mechanical and Aerospace Engineering,
e-mail: shiakolas@uta.edu
The University of Texas at Arlington
, Arlington, TX 76019
Search for other works by this author on:
Nitin Uppal
Department of Mechanical and Aerospace Engineering,
The University of Texas at Arlington
, Arlington, TX 76019
Panos S. Shiakolas
Department of Mechanical and Aerospace Engineering,
The University of Texas at Arlington
, Arlington, TX 76019e-mail: shiakolas@uta.edu
J. Manuf. Sci. Eng. Jun 2008, 130(3): 031117 (7 pages)
Published Online: June 3, 2008
Article history
Received:
November 12, 2007
Revised:
April 16, 2008
Published:
June 3, 2008
Citation
Uppal, N., and Shiakolas, P. S. (June 3, 2008). "Micromachining Characteristics of NiTi Based Shape Memory Alloy Using Femtosecond Laser." ASME. J. Manuf. Sci. Eng. June 2008; 130(3): 031117. https://doi.org/10.1115/1.2936380
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