Raman Mapping of the Indentation‐Induced Densification of a Soda‐Lime‐Silicate Glass

Micro‐ R aman spectroscopy was used to map the V ickers indentation‐induced densification on a window glass (soda‐lime silicate glass), from the correlation between R aman spectrum and density. Both top surface and cross‐section of the residual imprints were investigated. It is shown that the sample preparation needed for the investigation of the in‐depth densification does not alter the results. The maximum densification ratio measured is about 3.8%, which is 60% of the maximum densification measured after a high‐pressure hydrostatic loading. Within the experimental errors, densification maps are self‐similar for the two indentation loads used 10 N and 20 N . A comparison with finite element results based on a constitutive model developed for silica is discussed.