Abstract:
The appraisal of metallic materials requires application of advanced characterisation techniques. In this paper, the
use has been made of Scanning Electron Microscopy, Transmission Electron Microscopy, X-ray diffraction
(XRD) and Energy Dispersive X-ray Spectroscopy techniques to characterise morphological, structural and
chemical composition of 316-stainless steel and unknown brass sample. The determined lattice parameter of
unknown brass sample was 3.6812Ǻ and consisted of 63% Cu and 37% Zn by weight. The XRD analysis indicated
a faced-centred-cubic crystal structure and the sample concluded to be an alpha brass. The measured dislocation
density in 316-stainless steel increased with increasing plastic strain and the dislocation structures varied from
relatively uniform distribution at low strains to cell-like structures at high strains. The spread of X-ray diffraction
peak related linearly with the dislocation content of 316-stainless steel.
