Towards Dry Machining of Titanium-Based Alloys: A New Approach Using an Oxygen-Free Environment

In the current study, the potential of dry machining of the titanium alloy Ti-6Al-4V with uncoated tungsten carbide solid endmills was explored. It is demonstrated that tribo-oxidation is the dominant wear mechanism, which can be suppressed by milling in an extreme high vacuum adequate (XHV) environ...

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Published inMetals (Basel ) Vol. 10; no. 9; p. 1161
Main Authors Maier, Hans Jürgen, Herbst, Sebastian, Denkena, Berend, Dittrich, Marc-André, Schaper, Florian, Worpenberg, Sebastian, Gustus, René, Maus-Friedrichs, Wolfgang
Format Journal Article
LanguageEnglish
Published MDPI AG 01.09.2020
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Summary:In the current study, the potential of dry machining of the titanium alloy Ti-6Al-4V with uncoated tungsten carbide solid endmills was explored. It is demonstrated that tribo-oxidation is the dominant wear mechanism, which can be suppressed by milling in an extreme high vacuum adequate (XHV) environment. The latter was realized by using a silane-doped argon atmosphere. In the XHV environment, titanium adhesion on the tool was substantially less pronounced as compared to reference machining experiments conducted in air. This goes hand in hand with lower cutting forces in the XHV environment and corresponding changes in chip formation. The underlying mechanisms and the ramifications with respect to application of this approach to dry machining of other metals are discussed.
ISSN:2075-4701
2075-4701
DOI:10.3390/met10091161