Performance of CBN cutting tools in facing of age hardened inconel 718

R. M. Arunachalam*, M. A. Mannan

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


Inconel 718 is widely used in aerospace industries because of their ability to withstand excessive loads even at elevated temperatures. But this property makes it one of the most difficult to machine material resulting in lower cutting speeds and hence lower productivity and high costs. High speed machining (HSM) using cubic boron nitride (CBN) tools is an alternative to improve the productivity. The performance of CBN tools in the high speed facing operation of age hardened Inconel 718 for finishing application has been investigated. Crater break through at the cutting edge especially at the depth of cut notch region (DOCN) caused by a diffusion wear mechanism has been found to be the major cause for tool failure. It is concluded that there would be a significant improvement in the ability of CBN tools to cut Inconel 718 if it were possible to increase their resistance to diffusion at higher temperatures.

Original languageEnglish
Pages (from-to)525-532
Number of pages8
JournalTransactions of the North American Manufacturing Research Institute of SME
Publication statusPublished - 2004
Externally publishedYes
EventPapers Presented at NAMRC 32 - Charlotte, NC, United States
Duration: Jun 1 2004Jun 4 2004


  • CBN
  • Diffusion
  • Facing
  • Inconel 718
  • Tool wear

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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