TY - JOUR
T1 - Tool wear mechanisms of PcBN in machining Inconel 718
T2 - Analysis across multiple length scale
AU - Bushlya, Volodymyr
AU - Lenrick, Filip
AU - Bjerke, Axel
AU - Aboulfadl, Hisham
AU - Thuvander, Mattias
AU - Ståhl, Jan Eric
AU - M'Saoubi, Rachid
N1 - Funding Information:
This research was partly funded by European Union's Horizon 2020 Research and Innovation Programme under Flintstone 2020 project (grant agreement No. 689279 ). It was also co-funded by strategic research programme of Sustainable Production Initiative (SPI), involving cooperation between Lund University and Chalmers University of Technology. The authors also would like to express their gratitude to Dr. Mathias Agmell for the help with FEM simulations. Authors are grateful to E. Brug ( University of Cambridge ) for fruitful and inspiring discussions.
Publisher Copyright:
© 2021 CIRP
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021
Y1 - 2021
N2 - Recently, PcBN tooling have been successfully introduced in machining Ni-based superalloys, yet our knowledge of involved wear mechanisms remains limited. In this study, an in-depth investigation of PcBN tool degradation and related wear mechanisms when machining Inconel 718 was performed. Diffusional dissolution of cBN is an active wear mechanism. At high cutting speed oxidation of cBN becomes equally important. Apart from degradation, tool protection phenomena were also discovered. Oxidation of Inconel 718 resulted in formation of γ-Al2O3 and (Al,Cr,Ti)3O4 spinel that were deposited on the tool rake. Also on the rake, formation of (Ti,Nb,Cr)N takes place due to cBN-workpiece interaction. This creates a sandwich tool protection layer forming continuously as tool wear progresses. Such in operando protection enabled counterbalancing tool wear mechanisms and achieved high performance of PcBN in machining.
AB - Recently, PcBN tooling have been successfully introduced in machining Ni-based superalloys, yet our knowledge of involved wear mechanisms remains limited. In this study, an in-depth investigation of PcBN tool degradation and related wear mechanisms when machining Inconel 718 was performed. Diffusional dissolution of cBN is an active wear mechanism. At high cutting speed oxidation of cBN becomes equally important. Apart from degradation, tool protection phenomena were also discovered. Oxidation of Inconel 718 resulted in formation of γ-Al2O3 and (Al,Cr,Ti)3O4 spinel that were deposited on the tool rake. Also on the rake, formation of (Ti,Nb,Cr)N takes place due to cBN-workpiece interaction. This creates a sandwich tool protection layer forming continuously as tool wear progresses. Such in operando protection enabled counterbalancing tool wear mechanisms and achieved high performance of PcBN in machining.
KW - Diffusion
KW - Machining
KW - Wear
U2 - 10.1016/j.cirp.2021.04.008
DO - 10.1016/j.cirp.2021.04.008
M3 - Article
AN - SCOPUS:85105874120
SN - 0007-8506
VL - 70
SP - 73
EP - 78
JO - CIRP Annals - Manufacturing Technology
JF - CIRP Annals - Manufacturing Technology
IS - 1
ER -