Effect of self-absorption correction on surface hardness estimation of Fe–Cr–Ni alloys via LIBS

Abstract

The effect of self-absorption was investigated on the estimation of surface hardness of Fe–Cr–Ni metallic alloys by the laser-induced breakdown spectroscopy (LIBS) technique. For this purpose, the linear relationship between the ratio of chromium ionic to atomic line intensities (CrII/CrI) and surface hardness was studied, both before and after correcting the self-absorption effect. The correlation coefficient significantly increased from 47% to 90% after self-absorption correction. The results showed the measurements of surface hardness using LIBS can be more accurate and valid by correcting the self-absorption effect.

© 2017 Optical Society of America

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