Hybrid Ti-MoS2 coatings for dry machining of aluminium alloys

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dc.contributor.authorBrzezinka, Tomasz L.
dc.contributor.authorRao, Jeff
dc.contributor.authorChowdhury, Mohamad
dc.contributor.authorKohlscheen, Joern
dc.contributor.authorFox-Rabinovich, German S.
dc.contributor.authorVeldhuis, Stephen C.
dc.contributor.authorEndrino, José L.
dc.date.accessioned2017-10-09T09:31:18Z
dc.date.available2017-10-09T09:31:18Z
dc.date.issued2017-09-16
dc.description.abstractCombinatorial deposition, comprising filtered cathodic vacuum arc (FCVA) and physical vapor deposition (PVD) magnetron sputtering is employed to deposit molybdenum disulphide (MoS2) and titanium (Ti) thin films onto TiB2-coated tool inserts specifically designed for the dry machining of aluminium alloys. Titanium is deposited by FCVA while MoS2 is magnetron sputtered. The deposition set up allows several compositions of Ti-MoS2 to be deposited simultaneously, with Ti content ranging between 5 and 96 at. %, and their machining performances to be evaluated. Milling took place using a CNC Vertical Machining Center at a 877 mm/min feed rate. The effect of different coating compositional ratios on the degree of aluminium sticking when a milling insert is used to face mill an Al alloy (SAE 6061) was investigated using a combination of energy-dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS) analysis. XPS studies suggest that the greater degree of Al sticking on the rake face of the inserts is due to the formation of greater amounts of non-protective Ti-O phases. EDX mapping of the milling inserts after machining reveal that a Ti:MoS2 ratio of around 0.39 prevents Al from sticking to the tool edges. Since we prevent Al from sticking to the tool surface, the resultant machined surface finish is improved thus validating the machining performance of TiB2-coated tools using optimum compositions of Ti:MoS2 thin film coatings.en_UK
dc.identifier.citationBrzezinka TL, Rao J, Chowdhury M, et al., (2017) Hybrid Ti-MoS2 coatings for dry machining of aluminium alloys. Coatings, Volume 7, Issue 9, 2017, Article number 149en_UK
dc.identifier.cris18673970
dc.identifier.issn2079-6412
dc.identifier.urihttp://dx.doi.org/10.3390/coatings7090149
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/12606
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectSelf-lubricating compositesen_UK
dc.subjectMolybdenum disulphideen_UK
dc.subjectSEMen_UK
dc.subjectEDSen_UK
dc.subjectXPSen_UK
dc.subjectMillingen_UK
dc.subjectAluminiumen_UK
dc.titleHybrid Ti-MoS2 coatings for dry machining of aluminium alloysen_UK
dc.typeArticleen_UK

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