Investigation of electro-discharge micro-machining of titanium super alloy

Ultrashort Laser Pulses Machining

“…Hence, less than 10 nJ are enough to create damages in the bulk of glasses when using Ti:Sapphire lasers, and this figure increases to 30-160 nJ when using Yb:fiber lasers. Under these conditions, induced absorption occurs in a volume of less than 1µm 3 , and a single femtosecond pulse is enough to create damage in the bulk of any transparent material [108]. Within this volume, super-hot dense plasma is formed, creating very strong shock waves that destroy any atomic arrangement, resulting in modified structures or even voids.…”

“…Recently, mechanical micromachining with accurate positioning systems and very small drills were used to trim out materials, covering the range from some millimeters down to a few tens of nanometers [2]. A similar technique that also applies direct micromachining and requires a highly accurate positioning system but no contact, is Electron-Discharge Micromachining (EDM), in which material is removed by an electrode guided along the desired path, very close to the surface of a conducting material submerged in a dielectric fluid; a spark is established between the electrode and the material being processed, removing matter by melting and evaporation [3,4], with micrometric resolution. Similarly to EDM, the Focused Ion Beam (FIB) technique scans an ion beam, with spot sizes ranging from 10 to 500 nm, over a specimen, etching the material [5].…”

An Influence of Parameters of Micro-electrical Discharge Machining on Wear of Tool Electrode

“…In most of the recent investigations, the process characteristics and capabilities of micro-EDM have been studied and applied for several industrial applications [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. The stainless steels are characterized by the inherent luster, high corrosion resistance, strength, and therefore adequate attention has been allocated to the micro-EDM investigations on these class of materials [13][14][15][16][17][18][19][20].…”

“…The unique capabilities of micro-EDM-based processes and the correlation between the process performance outputs and the input process settings has been explored in detail by many researchers [21][22][23][24][25][26][27][28][29][30][31][32]. Kim et.…”

“…The micro-EDM plasma characteristics have been studied using optical spectroscopy methods [23]. The optimization of micro-EDM process parameters at various processing conditions was analyzed and compared [24,25] and for 'difficult-to-machine' materials as well [26]. The possibility of drilling on a high-nickel alloy using micro-EDM have been examined in [27].…”