Surface integrity when machining age hardened Inconel 718 with coated carbide cutting tools

R. M. Arunachalam, M. A. Mannan, A. C. Spowage

Research output: Contribution to journalArticle

143 Citations (Scopus)

Abstract

Considerable attention has been given to the use of ceramic cutting tools for improving productivity in the machining of heat resistant super alloys (HRSA). However, because of their negative influence on the surface integrity, ceramic tools are generally avoided particularly for finishing applications. As a result the main high end manufacturers are more or less dependent on carbide cutting tools for finishing operations. Still the improper use of carbide cutting tools can also result in poor surface integrity. The objective of this investigation is to develop a set of guidelines, which will assist the selection of the appropriate cutting tools and conditions for generating favorable compressive residual stresses. This paper specifically deals with residual stresses and surface finish components of surface integrity when machining (facing) age hardened Inconel 718 using two grades of coated carbide cutting tools specifically developed for machining HRSAs. The cutting conditions were obtained from investigations based on optimum tool performance. The effect of insert shape, cutting edge preparation, type and nose radius on both residual stresses and surface finish was studied at this optimum cutting condition. This investigation, suggested that coated carbide cutting tool inserts of round shape, chamfered cutting edge preparation, negative type and small nose radius (0.8 mm) and coolant will generate primarily compressive residual stresses.

Original languageEnglish
Pages (from-to)1481-1491
Number of pages11
JournalInternational Journal of Machine Tools and Manufacture
Volume44
Issue number14
DOIs
Publication statusPublished - Nov 2004

Fingerprint

Carbide cutting tools
Machining
Residual stresses
Compressive stress
Ceramic cutting tools
Ceramic tools
Cutting tools
Coolants
Productivity

Keywords

  • Facing
  • Inconel 718
  • PVD-TiAlN
  • Residual stresses
  • Surface finish
  • Surface integrity

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

Cite this

Surface integrity when machining age hardened Inconel 718 with coated carbide cutting tools. / Arunachalam, R. M.; Mannan, M. A.; Spowage, A. C.

In: International Journal of Machine Tools and Manufacture, Vol. 44, No. 14, 11.2004, p. 1481-1491.

Research output: Contribution to journalArticle

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