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

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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.

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Authors and Affiliations

  1. School of Mechanical Engineering, Yeungnam University, 214-1 Dae-dong, Gyeongsan-si, Gyeongsangbuk-do, 712-749, Korea

    Sang Tae Jung, Rendi Kurniawan & Tae Jo Ko

  2. Faculty of Mechanical Engineering, Kalasalingam University, Krishnankoil, 626 126, Tamil Nadu, India

    S. Thirumalai Kumaran

  3. School of Mechanical and Electrical Engineering, Hunan University of Science and Technology, Hunan Xiangtan Taoyuan Road, 411201, Hunan, China

    Chang Ping Li

Authors
  1. Sang Tae Jung
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  2. S. Thirumalai Kumaran
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  3. Chang Ping Li
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  4. Rendi Kurniawan
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  5. Tae Jo Ko
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Corresponding author

Correspondence to Tae Jo Ko.

Additional information

Recommended by Associate Editor Young Hun Jeong

Sang Tae Jung is a Ph.D. candidate in Mechanical Engineering at Yeungnam University, South Korea. He received bachelor degrees from Dongguk University, South Korea. He received master degrees from Yeungnam University, South Korea. His research interests include development of machine tools, micro-cutting process, nontraditional machining, micro stereolithography process using UV lamp, surface texturing using EDM Hybrid process of EDM-Drill composite.

Tae Jo Ko is a Professor in Mechanical Engineering at Yeungnam University, South Korea. He received bachelor and master degrees from Pusan National University, South Korea. He received Ph.D. in Mechanical Engineering from POSTECH, South Korea. His research interests include development of machine tools, micro-cutting process, nontraditional machining, surface texturing using piezo electric actuator, surface texturing using grinding, bio-machining, textured surface on cutting tools and deburring process of CFRP composite.

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Jung, S.T., Kumaran, S.T., Li, C.P. et al. Performance evaluation of micro-dimple formation on a Ti-6Al-4V alloy by using electrical discharge drilling. J Mech Sci Technol 32, 4365–4372 (2018). https://doi.org/10.1007/s12206-018-0835-z

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  • DOI: https://doi.org/10.1007/s12206-018-0835-z

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