EDM machinability of SiCw/Alcomposites

Electric discharge machining of Al–10%SiCP as-cast metal matrix composites

“…Despite the low electrical conductivity and high thermal resistance of the SiC reinforced particles, which ultimately reduces the electrical conductivity of the work material, the results obtained indicate that Al-10%SiC P can be machined effectively using EDM. These results are in good agreement with the observations of many researchers [9,15,16,19,20].…”

“…3). The high wear rate is attributed by the presence of low-melting alloy, zinc, in the brass tool [16]. However, the machining stability is achieved satisfactorily with brass tool since its high rate of erosion allows zinc vapours in the plasma channel, which might reduce arc resistance and helps quicker ionization also as reported by Mishra [17].…”

Electric discharge machining of Al–SiC metal matrix composites using rotary tube electrode

“…Utsuomiya et al [9] used laser machining to machine MMC's. Ramulu and Taya [5] used modified EDM to cut SiC-TiB 2 and SiC/Al with a plate electrode. Thus, in solving this problem, several machining processes revised from conventional EDM are proposed for precise machining.…”

Surface modifications of Al–Zn–Mg alloy using combined EDM with ultrasonic machining and addition of TiC particles into the dielectric

“…The Al-Zn-Mg alloy was a precipitate-strengthened material and locally intense heat caused the precipitated phase either to over-age or to remelt further into the matrix. Therefore, the external layer that was adjacent to the machined surface formed a softened layer in conventional EDM (Ramulu and Taya, 1989). In contrast, the combined process produced a hardened layer nearly 50 m from the machined surface, and the following sub-surface was a softened layer.…”