The Cr diffusion treatment plates produced layers with strong adhesive bonding to the counterpart material and is chemically active parameters

Previous examination of the worn samples was undertaken at EU  Materials Laboratory AGIR-Bucuresti, consisting in complementary metallurgical analysis, using micrographs and scanning electron microscopy (SEM/EDS)..Analytical techniques were used to characterize the wear, oxidation, morphology, and topography of the surfaces, plate and pin, to include: (1) VSI (vertical scanning interferometry) with a profile height resolution of 0.1 nm to determine the wear volume loss of pin-on-plate and the surface roughness. Ten surface roughness Interferometallography-InterMet,  measurements (10 determinations per  sample, using a cut-off 1/mm), were conducted with each  pin and plate specimen, prior to final analysis. Accordingly, data was averaged to obtain the surface roughness of each specimen.Material couples and the related pin/plate samples were based upon the actual cast materials used for vane and insert, respectively HK30 austenitic stainless steel (IDM 8365). The objective of the analysis was to further understand the Cr diffusion treatment, and the substrate behavior and / the degradation mode created, utilizing the tribological wear tests by new Interferometallography-InterMet.