Experimental research on the influence of dielectrics on short electric arc machining of GH4169

  • Xiaokang Chen
  • Jianping Zhou
  • Kedian WangEmail author
  • Yan Xu
  • Guoyu Hu
Technical Paper


Short electric arc machining (SEAM) is a novel electrical discharge machining method with low voltage and high current. Due to the narrow discharge gap, chip removal is difficult and short circuits can easily occur during processing. Dielectrics have an important role in SEAM as they influence chip removal. As such, selecting appropriate dielectrics can improve machining efficiency. This work seeks to reduce the occurrence of the above phenomena and improve machining efficiency by analyzing the working medium of air, tap water and air–water mixture. Effects on material removal rate, tool mass wear ratio (θ), surface roughness, macroscopic difference of GH4169 surface, interelectrode voltage–current waveform, surface micromorphology, debris morphology and the cross-sectional morphology are evaluated. The experimental results show that when air–water mixture is used as working medium, the machining efficiency is the highest. To further analyze the findings, the dielectric breakdown mechanism is examined, which provides an excellent working medium for more efficient SEAM process.


Short electric arc machining (SEAM) Working medium Material removal rate (MRR) Tool mass wear ratio (θSurface roughness (SR) 



This work is supported by the National Natural Science Foundation of China (Grant No. 51765063), Key Technologies Research and Development Program (Grant Nos. 2018B02009-1, 2018B02009-4), Xingjiang Uighur Autonomous Region Talent Project (Grant No. 10020000204) and State Key Laboratory for Manufacturing Systems Engineering (Xi’an Jiaotong University, Grant No. sklms2019009).


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Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2019

Authors and Affiliations

  1. 1.School of Mechanical EngineeringXinjiang UniversityUrumqiChina
  2. 2.School of Mechanical EngineeringXi’an Jiaotong UniversityXi’anChina
  3. 3.State Key Laboratory for Manufacturing Systems EngineeringXi’an Jiaotong UniversityXi’anChina

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