OPTIMASI PROSES MULTI-PASS EQUAL CHANNEL ANGULAR PRESSING DENGAN SIMULASI KOMPUTER
ABSTRACT: UFG (Ultra-fine
grained) material is a material with a grain size between 10 nm to 1000 nm were
developed to improve the quality of the material microstructure byreducing the
grain size. Equal Channel Angular Pressing (ECAP) is a method to produce the
UFG material by utilizing the shear stress on the material. Shear stress
distribution in the material as it passes through the channel intersection is
important to investigate so that it can be known the die design that can
produce a uniform shear stress distribution in the material. In this study,
computer simulation of multi-pass ECAP is carried out as the initial prediction
for reducing the trial- error ECAP process. Multi-pass ECAP process is modeled
with software based on Finite Element Method (FEM). Optimization is done with
L9 Taguchi which parameters arenumber of pass, angle of intersection, outer
fillet, and friction coefficient. By measuring the distribution of shear stress
and plastic strain on the model will be generated optimization of multi-pass
ECAP process.In the present study, the optimum setting for equal channel
angular pressing prosses are pass of 6,intersection angle of 90 , outer fillet
radii of 2 mm and coefficient friction of 0,1.
Penulis: Moch. Agus Choiron,
Khairul Anam, Totok Tri Prasetyo
Kode Jurnal: jptmesindd140186
