Abstract:
In the human body embed manufacturing industry, such as hip implant; the sand blasting process
is normally applied for improving the surface properties. The advantage of this process is its
ability to increase the surface roughness in order to enhance the binding of bone cells. However,
the process produces crack and residue of aluminium oxide particles because sand grains can
penetrate into the surface, causing contamination of material and reducing the mechanical
properties of a work piece.
This objective of the project is to study the method for removing crack and residual specimen on
surfice, in order to enhance the mechanical properties of titanium alloy grade TiA16V4 by
electrochemical process. In this experiment, machined tensile test pieces were sand blasted by
different sizes and shapes; the surface was then polished by electrochemical method under various
conditions. By using Keller's solution, it is found that electric current increased in proportion with
the duration of surface polishing; this affected the reduction of cracks and surface. The process
could also eliminate residual material the work on piece surface.