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dc.contributor.authorZammit, Ann-
dc.contributor.authorAttard, Marlon-
dc.contributor.authorSubramaniyan, Prabhakaran-
dc.contributor.authorLevin, Sebastian-
dc.contributor.authorWagner, Lothar-
dc.contributor.authorCooper, Jack-
dc.contributor.authorEspitalier, Laurent-
dc.contributor.authorCassar, Glenn-
dc.identifier.citationZammit, A., Attard, M., Subramaniyan, P., Levin, S., Wagner, L., Cooper, J.,...Cassar, G. (2022). Enhancing surface integrity of titanium alloy through hybrid surface modification (HSM) treatments. Materials Chemistry and Physics, 125768.en_GB
dc.description.abstractThe current study investigates the development of a novel hybrid surface modification (HSM) technique to improve the surface integrity of Ti–6Al–4V alloy. The approach combines the mechanical shot peening (SP) and the deposition by Physical Vapour Deposition (PVD) of a tungsten-doped diamond-like carbon coating (WC/C) on Ti–6Al–4V surfaces. The mechanical shot peening induced high surface roughness increasing the metallurgical bonding sites for the PVD deposition, whereas mainly the grain growth during the deposition, was successfully eliminated. The mechanical SP process induced the high strain lattice misorientations evident for increasing the dislocation density in the crystalline structure. The Electron Backscatter Diffraction (EBSD) results suggest that subjecting the SP specimens to a temperature of 240 ◦C for more than 3 h during coating deposition, results in a reduction of dislocation densities, presumably as a result of dislocation annihilation by heat-activated dislocation mobilisation. Hence, the presented Grain Orientation Spread maps suggest that some degree of macro and micro stress relaxation may have occurred during the coating deposition treatment. Further, the Raman spectroscopy confirms the existence of beneficial compressive residual stresses on both PVD and hybrid (HY) coated surfaces. Comparatively, the HY surfaces show a high hardness of 12.08 GPa and high elasticity indices (H/E ratios) of 0.1.en_GB
dc.subjectTitanium alloys -- Surfaces -- Testingen_GB
dc.subjectPhysical vapor depositionen_GB
dc.subjectShot peeningen_GB
dc.subjectSurfaces (Physics) -- Analysisen_GB
dc.titleEnhancing surface integrity of titanium alloy through hybrid surface modification (HSM) treatmentsen_GB
dc.rights.holderThe copyright of this work belongs to the author(s)/publisher. The rights of this work are as defined by the appropriate Copyright Legislation or as modified by any successive legislation. Users may access this work and can make use of the information contained in accordance with the Copyright Legislation provided that the author must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the prior permission of the copyright holder.en_GB
dc.publication.titleMaterials Chemistry and Physicsen_GB
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