Micromachining Characteristics of NiTi Based Shape Memory Alloy Using Femtosecond Laser

Author:

Uppal Nitin1,Shiakolas Panos S.1

Affiliation:

1. Department of Mechanical and Aerospace Engineering, The University of Texas at Arlington, Arlington, TX 76019

Abstract

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.

Publisher

ASME International

Subject

Industrial and Manufacturing Engineering,Computer Science Applications,Mechanical Engineering,Control and Systems Engineering

Reference17 articles.

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5. Keeping the Shape Memory Properties of Miniaturized Components of NiTi-Alloys by Laser Micromachining;Haferkamp

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