Surface modification of Al-Zn-Mg alloy by combined electrical discharge machining with ball burnish machining

B. H. Yan, Y. C. Lin, F. Y. Huang

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

The study investigated the feasibility of modifying the surface of Al-Zn-Mg alloy by a combined process of electric discharge machining (EDM) with ball burnish machining (BBM). A novel process that integrates EDM and BBM is also developed to conduct experiments on an electric discharge machine. Machining parameters of the combined process, including machining polarity, peak current, power supply voltage, and the protruding of ZrO2, are chosen to determine their effects on material removal rate, surface roughness and the improvement ratio of surface roughness. In addition, the extent to which the combined process affects surface modification is also evaluated by microhardness and corrosion resistance tests. Experimental results indicate that the combined process of EDM with BBM can effectively improve the surface roughness to obtain a fine-finishing and flat surface. The micropores and cracks caused from EDM are eliminated during the process as well. Furthermore, such a process can reinforce and increase the corrosion resistance of the machined surface after machining.

Original languageEnglish
Pages (from-to)925-934
Number of pages10
JournalInternational Journal of Machine Tools and Manufacture
Volume42
Issue number8
DOIs
StatePublished - Jun 2002

Keywords

  • Ball burnish machining
  • Combined process
  • Electric discharge machining
  • Surface modification
  • Surface roughness

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