| Summary: | he Wire Electro Discharge Machining (WEDM)
process is a violent thermal process where literally thousands of
electrical discharges are produced in a fraction of a second in
order to erode a certain volume of metal. The process is most
used in situations where intricate complex shapes need to be
machined in very hard materials (such as hardened tool steel).
However, the process generates surface that have poor
properties such as high tensile residual stresses, high surface
roughness, presence of micro-cracks and micro-voids. These
properties vary with different levels of the main machining
parameters. The aim of this paper is to present experimental
work that has been done in order to quantify the effect of some
of the main WEDM parameters on the surface texture of AISI
4140 steel. 2D surface measurements were taken on all WEDM
samples and 2D surface characterization has been carried out in
order to calculate the different surface texture parameters. In
this work, the surface characteristics caused by WEDM were
analyzed by Scanning Electron Microscopy (SEM).
|
|---|