Abstract:
Abstract. This paper presents a finite element simulation of equal channel
angular pressing (ECAP) since it is one of the most common and successful
severe plastic deformation techniques. This study reports the influence of
the most significant factors influencing the ECAP technique. Through finite
element simulation, the effect of the die geometry, workpiece geometry, and
the pressing speed on the effective strain distributions, damage, and pressing
loads, were investigated. The influence of the ECAP method on different
material models is also presented. Additionally, the prospective expansion
and future applications of ECAP are herein highlighted. From the results,
the die geometry of a 90° channel imparts the highest strains during ECAP.
Additionally, specimens of rectangular geometry are susceptible to cracking
and damage as compared to circular samples. It was found that very high
processing speeds (>7mm/sec) are undesirable during ECAP since they
cause very high internal stresses to the structure of the workpieces. Besides,
processing at room temperature can achieve homogeneous strain distribution
with minimum sample damage.
