Surface modification and fatigue properties of electrical discharge machined aluminum alloy 6061 using plasma etching

Chin Guo Kuo, Chun Yao Hsu, Jung Hsuan Chen, Po Wei Lee

Research output: Contribution to journalArticle

Abstract

Aluminum (Al) alloy 6061 is often used in engineering applications due to its high strength, excellent fracture toughness, and corrosion resistance. Lots of material removal or machining processes would induce some undesirable side effects like surface damages, fractures, and erosions. In this study, the surface defects in the workpieces caused by the electrical discharge machining process were eliminated with the plasma etching treatment. Meanwhile, the surface integrity and the fatigue properties of the workpiece improved significantly. Surface roughness, contact angle, and morphology were investigated by varying plasma etching parameters such as the etching power, oxygen gas flow, and the etching time. Furthermore, the optimum process conditions were evaluated using statistical analyses. The workpiece treated with the plasma etching had the smallest roughness of 12.2 µm, the largest contact angle of 92°, and 25% increase in the fatigue life. These experimental results indicated that the surface characteristics of the workpiece had a great influence on the fatigue life of electrical discharge machined Al alloy.

Original languageEnglish
JournalAdvances in Mechanical Engineering
Volume10
Issue number1
DOIs
Publication statusPublished - 2018 Jan 1

Fingerprint

Plasma etching
Surface treatment
Aluminum alloys
Fatigue of materials
Contact angle
Etching
Surface roughness
Electric discharge machining
Surface defects
Flow of gases
Corrosion resistance
Fracture toughness
Erosion
Machining
Oxygen

Keywords

  • Plasma etching
  • electric discharge machining
  • fatigue life
  • statistical analyses
  • surface quality

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Surface modification and fatigue properties of electrical discharge machined aluminum alloy 6061 using plasma etching. / Kuo, Chin Guo; Hsu, Chun Yao; Chen, Jung Hsuan; Lee, Po Wei.

In: Advances in Mechanical Engineering, Vol. 10, No. 1, 01.01.2018.

Research output: Contribution to journalArticle

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