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Experimental Study of Wear Mechanisms of Cemented Carbide in the Turning of Ti6Al4V
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. Dalarna Univ, Mat Sci, SE-79188 Falun, Sweden.ORCID iD: 0000-0001-5536-3077
Sandvik Coromant, R&D, SE-12680 Stockholm, Sweden.
Sandvik Coromant, R&D, SE-12680 Stockholm, Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. Dalarna Univ, Mat Sci, SE-79188 Falun, Sweden.
2019 (English)In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 12, no 17, article id 2822Article in journal (Refereed) Published
Abstract [en]

Titanium and titanium alloys such as Ti-6Al-4V are generally considered as difficult-to-machine materials. This is mainly due to their high chemical reactivity, poor thermal conductivity, and high strength, which is maintained at elevated temperatures. As a result, the cutting tool is exposed to rather extreme contact conditions resulting in plastic deformation and wear. In the present work, the mechanisms behind the crater and flank wear of uncoated cemented carbide inserts in the turning of Ti6Al4V are characterized using high-resolution scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and high-resolution Auger electron spectroscopy (AES).The results show that, for combinations of low cutting speeds and feeds, crater and flank wear were found to be controlled by an attrition wear mechanism, while for combinations of medium to high cutting speeds and feeds, a diffusion wear mechanism was found to control the wear. For the latter combinations, high-resolution SEM and AES analysis reveal the formation of an approximately 100 nm thick carbon-depleted tungsten carbide (WC)-layer at the cemented carbide/Ti6Al4V interface due to the diffusion of carbon into the adhered build-up layers of work material on the rake and flank surfaces.

Place, publisher, year, edition, pages
2019. Vol. 12, no 17, article id 2822
Keywords [en]
turning, cemented carbide, Ti6Al4V, attrition wear, diffusion wear, SEM, EDS
National Category
Manufacturing, Surface and Joining Technology
Identifiers
URN: urn:nbn:se:uu:diva-396546DOI: 10.3390/ma12172822ISI: 000488880300175PubMedID: 31480695OAI: oai:DiVA.org:uu-396546DiVA, id: diva2:1368562
Available from: 2019-11-07 Created: 2019-11-07 Last updated: 2019-11-07Bibliographically approved

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