Usefulness of X-ray diffraction and Raman Spectra for Understanding Metal Alloy Microstructure Repeatability

This is a quantitative methodology for checking repeatability in microstructure using X-ray diffraction (XRD) and Raman spectra of aluminium and brass. The crystallinity and microstructure of the aluminium or brass samples are different if their manufacturing sources are different, due to differences in processing methodologies. It was quantitatively estimated from their Raman spectral profile. Aluminium and brass, from the same source and batch, showed more comparable XRD and Raman patterns. This method highlighted extent of uniformity achieved using a certain production method and also suggests scope for improvements. It improves testing repeatability of ferrous and non-ferrous metals and alloy products, using these two techniques alone, rather than using a plethora of analytical testing techniques currently used for a metal manufacturing process.