Abstract
Laser-induced breakdown spectroscopy (LIBS) measurements were performed on a steel sample to investigate the feasibility for obtaining fast information on cleanness. A calibration approach was considered to enable the quantification of the elemental composition of nonmetallic inclusions. The same data was also used to estimate the size of the inclusions. Preliminary results for the determination of inclusion populations by LIBS were very encouraging and compared very well with scanning electron microscopy energy dispersive X-ray (SEM-EDX) results, which is the conventional method used for steel cleanness assessment. Due to the speed of analysis and the systematic recording of signal on the scanned area, LIBS enables the analysis of larger areas of sample and in significantly shorter time than with automated SEM-EDX. This paper summarizes the results obtained up until now for the fast analysis of inclusions in steel by LIBS.
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