Effects of cutting speed on phase changes in ultra-precision raster milling of Zn–Al alloy

S. J. Zhang, Suet To, X. X. Rao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Ultra-precision raster milling induces external stress to cause phase changes of Zn–Al alloy at a thin surface layer, which further degrade surface integrity of high-precision components. This study focuses on discussing phase changes at the surfaces of the alloy after ultra-precision raster milling under the high cutting speeds of 680 m/min, 1120 m/min, and 1360 m/min. Along with the penetration depth at the machined surfaces, phase changes and surface hardening rapidly declined to vanish with crystal orientation shift back to its standard Bragg angle. As the cutting speeds increased, phase changes, crystal orientation shift, and surface hardening obviously decreased with phase change thicknesses from 323 nm, 241 nm to 87 nm. It is worth noticing that at a high cutting speed phase changes at the machined surface can be greatly reduced to a significant degree.
Original languageEnglish
Pages (from-to)31-41
Number of pages11
JournalProceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
Volume232
Issue number1
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • Phase change
  • ultra-precision raster milling
  • Zn–Al alloy

ASJC Scopus subject areas

  • Mechanical Engineering

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