The influence of pulse-on time and pulse-off time to hardness of aluminum 7075 processed by electrical discharge machining

Authors

  • Moch. Syamsul Ma'arif Universitas Brawijaya Author
  • Abu Rizal Firdaus Universitas Brawijaya Author
  • Redi Bintarto Universitas Brawijaya Author
  • Iis Siti Aisyah Universitas Muhammadiyah Malang Author

DOI:

https://doi.org/10.71452/ydapnm85

Keywords:

pulse on time; pulse of time; EDM; hardness; aluminium alloy

Abstract

This study search at the the hardness of 7075 Aluminum alloy processed in EDM machining by varying pulse-on time and pulse-off time. This study uses an Electrical Discharge Machining (EDM) of C-TEK ZNC 320 Series and the specimens is tested for hardness by a Rockwell Hardness Tester. The material used is Aluminum 7075. EDM is chosen as because it does not require deformation force to perform machining process and suitable for machining of materials that are elastic, easy to form and have high thermal conductivity such as aluminum 7075. The electrode used is copper (Cu) with a diameter of 25.4 mm and a length of 50 mm. The process parameters used are pulse-on time: 50 μs, 75 μs, 100 μs and pulse-off time: 4 μs, 6 μs, 9 μs. The data are consisted of 9 specimens (cells). The results of the average hardness measurements from experiments 1 and 9 are: 28.03 HBR, and 50.80 HBR. Analysis of variance (Anova) shows the calculated F value is 71.55, the

Author Biographies

  • Moch. Syamsul Ma'arif, Universitas Brawijaya

    Associate Professor, Department of Mechanical Engineering, Faculty of Engineering, Universitas Brawijaya

  • Abu Rizal Firdaus, Universitas Brawijaya

    Mechanical Engineering Department, Faculty of Engineering, Universitas Brawijaya

  • Redi Bintarto, Universitas Brawijaya

    Assistant Professor, Department of Mechanical Engineering, Faculty of Engineering, Universitas Brawijaya

  • Iis Siti Aisyah, Universitas Muhammadiyah Malang

    Associate Professor, Department of Mechanical Engineering, Faculty of Engineering, Universitas Muhammadiyah Malang

References

Bisono, Rahayu M. 2015. Optimasi Multi Respon Pada Proses Electrical Discharge Machining (EDM) Sinking Material Baja Perkakas DAC Dengan Menggunakan Metode Taguchi-Grey- Fuzzy. Institut Teknologi Sepuluh Nopember. Surabaya.

Budiyarti, P. Ilman, M. 2018. Studi Experimental Fatik Korosi Aluminium Paduan 7075-T6 Pada Lingkungan 3,5% NaCl Dengan Inhibitor Na2CrO4. Universitas Gadjah Mada.

Yogyakarta

Yuliyanto. 2017. Analisi Kekerasan Permukaan Titanium-6Al-4V Pada Proses EDM Sink-ing Dengan Aplikasi Response Surface Methodology (RSM). Politeknik Manufaktur Negeri Belitung. Industri Airkantung Sungailiat.

Wijoyo. Indriyanto, B. 2016. Pengaruh Masukan Panas (Hest Input) Terhadap Ketangguhan Impak Sambungan Las TIG Al-13, 5Si. Universitas Surakarta. Karanganyar.

Cover SNTTM 2025

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Published

09-03-2026

Conference Proceedings Volume

Vol. 23 No. 1 (2025): SNTTM XXIII October 2025

Section

Manufacturing

License

Copyright (c) 2026 Dr. Moch. Syamsul Ma'arif, ST., MT., Abu Rizal Firdaus, ST., Dr. Ir. Redi Bintarto, ST., M.Eng.Pract., IPM, Ir. Iis Siti Aisyah, ST., MT., Ph.D., IPM. (Author)

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Proceeding SNTTM by BKS-TM Indonesia is licensed under Creative Commons Attribution 4.0 International 

How to Cite

[1]
M. S. Ma'arif, A. R. Firdaus, R. Bintarto, and I. S. Aisyah , Trans., “The influence of pulse-on time and pulse-off time to hardness of aluminum 7075 processed by electrical discharge machining”, Seminar Nasional Tahunan - Teknik Mesin , vol. 23, no. 1, pp. 93–98, Mar. 2026, doi: 10.71452/ydapnm85.