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dc.contributor.authorKent, D
dc.contributor.authorRashid, RR
dc.contributor.authorBermingham, M
dc.contributor.authorAttar, H
dc.contributor.authorSun, S
dc.contributor.authorDargusch, M
dc.date.accessioned2019-06-27T12:30:57Z
dc.date.available2019-06-27T12:30:57Z
dc.date.issued2018
dc.identifier.issn2075-4701
dc.identifier.doi10.3390/met8090710
dc.identifier.urihttp://hdl.handle.net/10072/384176
dc.description.abstractNew metastable β titanium alloys are receiving increasing attention due to their excellent biomechanical properties and machinability is critical to their uptake. In this study, machining chip microstructure has been investigated to gain an understanding of strain and temperature fields during cutting. For higher cutting speeds, ≥60 m/min, the chips have segmented morphologies characterised by a serrated appearance. High levels of strain in the primary shear zone promote formation of expanded shear band regions between segments which exhibit intensive refinement of the β phase down to grain sizes below 100 nm. The presence of both α and β phases across the expanded shear band suggests that temperatures during cutting are in the range of 400–600 °C. For the secondary shear zone, very large strains at the cutting interface result in heavily refined and approximately equiaxed nanocrystalline β grains with sizes around 20–50 nm, while further from the interface the β grains become highly elongated in the shear direction. An absence of the α phase in the region immediately adjacent to the cutting interface indicates recrystallization during cutting and temperatures in excess of the 720 °C β transus temperature.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherMDPI AG
dc.relation.ispartofchapter9
dc.relation.ispartofpagefrom710
dc.relation.ispartofpageto710
dc.relation.ispartofissue9
dc.relation.ispartofjournalMetals
dc.relation.ispartofvolume8
dc.subject.fieldofresearchResources engineering and extractive metallurgy
dc.subject.fieldofresearchcode4019
dc.titleInsights into machining of a β titanium biomedical alloy from chip microstructures
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionVersion of Record (VoR)
gro.rights.copyrightThis is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
gro.hasfulltextFull Text
gro.griffith.authorSun, Shoujin


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