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Journal of Mechanical Science and Technology

, Volume 32, Issue 9, pp 4365–4372 | Cite as

Performance evaluation of micro-dimple formation on a Ti-6Al-4V alloy by using electrical discharge drilling

  • Sang Tae Jung
  • S. Thirumalai Kumaran
  • Chang Ping Li
  • Rendi Kurniawan
  • Tae Jo Ko
Article
  • 5 Downloads

Abstract

Micro-dimple formation improves the tribological behavior of a material. This study investigates dimple formation on a titanium (Ti-6Al-4V) alloy by using electrical discharge drilling. Input parameters, namely capacitance (C), pulse-on-time (Ton), and voltage (V), were varied to measure the output quality responses including dimple depth, burr height, and burr width. The experimental results indicated that the quality of the dimple is determined based on the spark energy and rate of material removal. A regression analysis was performed for each output response. The developed model confirmed the fitness at a 95 % confidence interval. The contribution of each factor and its significance was determined by using analysis of variance (ANOVA). Further, the optimum drilling condition was predicted by using desirability analysis (C = 10000 pF, Ton = 100 μs, and V = 180 V). The microscopic view of the dimple array and the micro-dimple geometry were analyzed by using scanning electron microscopy images.

Keywords

Burr height Burr width Dimple depth Electrical discharge drilling 

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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Sang Tae Jung
    • 1
  • S. Thirumalai Kumaran
    • 2
  • Chang Ping Li
    • 3
  • Rendi Kurniawan
    • 1
  • Tae Jo Ko
    • 1
  1. 1.School of Mechanical EngineeringYeungnam UniversityGyeongsangbuk-doKorea
  2. 2.Faculty of Mechanical EngineeringKalasalingam UniversityKrishnankoilIndia
  3. 3.School of Mechanical and Electrical EngineeringHunan University of Science and TechnologyHunanChina

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