Table 3 Shows different properties of Copper Tool.

From: Enhanced machining of Al 10%SiCmicro 1%SiCnano hybrid composite using rotary tool rotary workpiece EDM with bio dielectrics and treated tools

Copper tool

Microhardness

Porosity

Wear rate/min

Non treated tool

395 HV

0.000844

0.000689

Heat treated tool

366 HV

0.000845

0.001457

Cryogenic treated tool

343 HV

0.001017

0.001121

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