Quantitative mapping of carbon content in archaeological ferrous metals with laser-induced breakdown spectroscopy

Comparative study on quantitative carbon content mapping in archaeological ferrous metals with laser-induced plasma spectroscopy (LIBS) and nuclear reaction analysis (NRA) for 3D representation by LIBS

“…A Widmanstätten structure has been found with a typical acicular ferrite, which shows a fabrication on fast cooling state. In order to obtain the quantitative mapping, six reference steel samples were used to build a calibration curve for macro-and micro-analysis in previous works [19,20]. They all have the equilibrium homogeneous phases with the carbon concentrations of 0.006%, 0.08%, 0.44%, 0.45%, 0.59% and 0.75%.…”

“…The implementation of the DIGE induced the complete recovering of the surface with a step to step dimension equal to the spot dimension contrary to the libs that has a step of 100 micron that can induced a lost part of the grain borders, in some cases. Table 1 resumes the mapping area, spatial resolution and time-consuming by macro and micro-LIBS [19] and IBA-DIGE methods . If the measuring area is extended for IBA-DIGE to the same as micro-analysis, the time consuming will reach the same duration for these two methods.…”