Machining-induced microstructure of Inconel 718 in cryogenic environment

Nurul Hayati Abdul Halim, Che Hassan Che Haron, Jaharah A Ghani, Muammar Faiq Azhar

Research output: Contribution to journalArticle

Abstract

This paper investigates the effect of cryogenic cooling on surface integrity of Inconel 718 in milling operations. The cutting process was conducted using carbide coated ball nose milling inserts and liquid nitrogen as the coolant. A full factorial with three factors two levels each was adopted to run the experiments. Results revealed that the surface roughness were in the range of 0.134 µm to 0.264 µm which were less than the values obtained using manual polishing process (≈0.5 µm). The roughness was significantly affected by the interaction between cutting speed and feed rate followed by the radial depth of cut. Microstructure beneath the machined surface exhibited some plastic deformation down to 30.93 µm due to the sliding of tool over the surface during the shearing process that increased the cutting pressure at elevated temperature and caused deformation of the grain structure, which was better than dry machining.

Original languageEnglish
Pages (from-to)234-246
Number of pages13
JournalProgress in Industrial Ecology
Volume12
Issue number3
DOIs
Publication statusPublished - 1 Jan 2018

Fingerprint

microstructure
plastic deformation
surface roughness
sliding
roughness
agricultural product
integrity
cooling
liquid
nitrogen
experiment
interaction
cutting (process)
Machining
Microstructure
temperature
Milling
rate
speed
effect

Keywords

  • Cryogenic machining
  • Inconel 718
  • Milling
  • Surface integrity

ASJC Scopus subject areas

  • Ecology
  • Development
  • Waste Management and Disposal
  • Economics, Econometrics and Finance(all)
  • Management, Monitoring, Policy and Law

Cite this

Machining-induced microstructure of Inconel 718 in cryogenic environment. / Halim, Nurul Hayati Abdul; Che Haron, Che Hassan; A Ghani, Jaharah; Azhar, Muammar Faiq.

In: Progress in Industrial Ecology, Vol. 12, No. 3, 01.01.2018, p. 234-246.

Research output: Contribution to journalArticle

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