Product Code: ICAL09_1703

Spectroscopic Study of Inconel 718 Plasma Generated during Laser Drilling Process
Authors:
Joonghan Shin, CLAIM, The University of Michigan; Ann Arbor MI USA
Jyoti Mazumder, -; -
Presented at ICALEO 2009

An aero space material, Inconel 718, was laser drilled with a diode pumped solid state Nd:YAG laser. During the laser drilling process, the emission spectra of the Inconel 718 plasma have been recorded and analyzed using an optical emission spectroscopic method. After the process, the drilling depth of the holes produced at various conditions was measured by optical microscope. Temporal histories of the emission line intensity and drilling depth were obtained. The correlation, predicting the drilling depth, between the line intensity and drilling depth was investigated. The electron temperature of the plasma and the electron number density were also determined to enhance understanding for the process.