In EDM process, tool wear is almost inevitable and wear characteristics do depend on tool electrode material properties, flushing conditions etc.
But will tool wear be affected by the work piece properties? For example a material like titanium which have poor thermal conductivity is difficult to machine and the machining time will be very high in comparison with the same for a material like stainless steel.
My doubt is, apart from this longer machining time (which will result into prolonged exposure of the tool electrode to discharge conditions and may result in relatively higher wear) does any property of the work piece material (say thermal conductivity) will have a direct influence on tool wear?
Of course, removal rate and wear of the electrical and thermal properties of the electrode materials are dependent.
The metals and many alloys can be assumed that a good electrical conductivity is also in a good thermal conductivity. The tool electrode should have very good thermal conductivity, because then through the lower energy density in the spark-base point, the energy is more easily dissipated, and there is less melting and evaporation of the material. When the workpiece matter is a bit more complicated, because I do not have the choice there, but wants a material ED edit. The different concentration of the energy density in the cathodic base point can oppose an appropriate shaping of the machining pulse. It makes a difference if I flat, smooth surfaces wants to finishing, or in the roughing a deeper insight erosion.
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