Open AccessOn machining Ti6Al4V ELI with EDM by using copper and graphite electrodes: a comparison study
Author(s) -
Panagiotis Karmiris-Obratański,
Krzysztof Zagórski,
Emmanouil L. Papazoglou,
Nikolaos E. Karkalos,
Angelos P. Markopoulos
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1037/1/012003
Subject(s) - machining , electrical discharge machining , materials science , surface roughness , titanium alloy , graphite , electrical conductor , copper , mechanical engineering , electrode , metallurgy , titanium , surface finish , composite material , engineering , alloy , chemistry
Electrical Discharge Machining (EDM) is a non-conventional machining process, in which, the material removal occurs by repetitive sparks. By utilizing EDM, conductive materials can be machined in complex shapes and geometries, with high dimensional accuracy, regardless of their mechanical properties. Titanium alloys, due to their unique inherent properties, find extensive use in the modern industrial environment. Nevertheless, they are still classified as hard-to-cut materials, facing significant difficulties in their machining with conventional methods. The current paper presents a comparative study regarding the machining of Ti6Al4V ELI with EDM, by using copper and graphite electrodes. The control parameters were the pulse-on current and time, while the machining performance was estimated in terms of Material Removal Rate (MRR) and Tool Wear Ratio (TWR). Additionally, the surface roughness was evaluated according to the Ra. For the aforementioned indexes, Analysis Of Variance (ANOVA) was performed.