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M. Bonta, R. Oro Calderon, C. Gierl-Mayer, H. Danninger, A. Limbeck:
"Laterally resolved analysis of steels using LIBS: Revealing the distribution of metallic and non-metallic additions";
Vortrag: SCIX 2016, Minneapolis, MN, USA (eingeladen); 18.09.2016 - 23.09.2016; in: "Final Program", (2016), 54 S.

Metallic as well as non-metallic additions are commonly used in the production of powder metallurgy steels to improve mechanical properties of the material. Their analysis is of utmost importance to be able to correlate for example hardness or ductility with the chemical composition. Thereby gained information can be used for further improvement of the production process. Laser Induced Breakdown Spectroscopy (LIBS) is a well-established method for the bulk analysis of steels. Compared to often used X-ray-based techniques, light elements like boron - a very promising hardening agent - can be analyzed using LIBS with sufficient sensitivity. Despite the ability of LIBS to perform laterally resolved analysis, mostly applications for bulk analysis have been reported so far.
With possible lateral resolutions of tens of µm, sufficient sensitivity for most relevant elements in steels, and rapid data acquisition, a micro-focused LIBS system provides optimal conditions for the laterally resolved analysis of different additions in steels. In this work, the possibilities for laterally resolved analysis of powder metallurgy steels using LIBS will be outlined and different application examples will underline the suitability of this method for elemental imaging of steel samples. Special focus will be set on the analysis of elements like boron and carbon, which are hard or even impossible to analyze using other methods.

LIBS, elemental imaging, powder metallurgy steels