Investigation of the Wear Performance of TiB2 Coated Cutting Tools during the Machining of Ti6Al4V Alloy
Department of Mechanical Engineering, McMaster Manufacturing Research Institute (MMRI), McMaster University, 1280 Main Street West, Hamilton, ON L8S4L7, Canada
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Author to whom correspondence should be addressed.
Academic Editor: Andrzej Dziedzic
Materials 2021, 14(11), 2799; https://doi.org/10.3390/ma14112799
Received: 17 April 2021
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Revised: 6 May 2021
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Accepted: 20 May 2021
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Published: 24 May 2021
The machining of Ti6Al4V alloy, especially at low cutting speeds, is associated with strong Built-Up Edge (BUE) formation. The PVD coatings applied on cutting tools to machine such materials must have the necessary combination of properties to address such an underlying wear mechanism. The present work investigates and shows that TiB2 PVD coating can be designed to have certain mechanical properties and tribological characteristics that improve machining in cases where BUE formation is observed. Three TiB2 coatings were studied: one low hardness coating and two high hardness coatings with varied coating thicknesses. Wear performances for the various TiB2 coated carbide tools were evaluated while rough turning Ti6Al4V. Tool wear characteristics were evaluated using tool life studies and the 3D wear volume measurements of the worn surface. Chip morphology analyses were done to assess the in-situ tribological performance of the coatings. The micro-mechanical properties of the coatings were also studied in detail to co-relate with the coatings’ performances. The results obtained show that during the rough turning of Ti6Al4V alloy with intensive BUE formation, the harder TiB2 coatings performed worse, with coating delamination on the rake surface under operation, whereas the softer version of the coating exhibited significantly better tool life without significant coating failure.
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Keywords:
rough turning; Ti6Al4V alloy; PVD coating; built-up edge (BUE); flank wear; tribo-films; magnetron sputtering
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MDPI and ACS Style
Chowdhury, M.S.I.; Bose, B.; Fox-Rabinovich, G.; Veldhuis, S.C. Investigation of the Wear Performance of TiB2 Coated Cutting Tools during the Machining of Ti6Al4V Alloy. Materials 2021, 14, 2799. https://doi.org/10.3390/ma14112799
AMA Style
Chowdhury MSI, Bose B, Fox-Rabinovich G, Veldhuis SC. Investigation of the Wear Performance of TiB2 Coated Cutting Tools during the Machining of Ti6Al4V Alloy. Materials. 2021; 14(11):2799. https://doi.org/10.3390/ma14112799
Chicago/Turabian StyleChowdhury, Mohammad S.I., Bipasha Bose, German Fox-Rabinovich, and Stephen C. Veldhuis. 2021. "Investigation of the Wear Performance of TiB2 Coated Cutting Tools during the Machining of Ti6Al4V Alloy" Materials 14, no. 11: 2799. https://doi.org/10.3390/ma14112799
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