Multi-functional nano-multilayered AlTiN/Cu PVD coating for machining of Inconel 718 superalloy

G. S. Fox-Rabinovich, K. Yamamoto, M. H. Aguirre, D. G. Cahill, S. C. Veldhuis, A. Biksa, G. Dosbaeva, L. S. Shuster

Research output: Contribution to journalArticlepeer-review


Machining of Ni-based aerospace alloys is one of the major challenges of modern manufacturing. Application of cemented carbide tooling with nano-multilayered AlTiN/Cu PVD coating results in a significant tool life improvement under conditions of turning the hard-to-machine aerospace Ni-based Inconel 718 superalloy. Studies of the structure, properties, tribological and wear performance of the nano-multilayered AlTiN/Cu PVD coating have been performed. The structure of the coating has been investigated using High Resolution Transmission Electron Microscopy. Various properties of the coating including microhardness, thermal conductivity and coefficient of friction vs. temperature were measured. Investigations of the coated tool life, wear behavior and chip formation for cutting tools with nano-multilayered AlTiN/Cu PVD coating were performed. Morphology of the worn tools has been studied using SEM/EDX. AlTiN/Cu coatings present multi-functionality because they combine self-lubricating behavior with reduced thermal conductivity. This beneficial combination of properties results in significant improvement of the coated tool life.

Original languageEnglish (US)
Pages (from-to)2465-2471
Number of pages7
JournalSurface and Coatings Technology
Issue number15
StatePublished - Apr 25 2010


  • Aerospace alloys
  • Machining
  • Multi-functional coatings
  • Nano-multilayered films
  • PVD

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces


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