T-ECAP process is a reversion of equal channel angular pressing which employs T shaped die instead of L shaped die. In the present study, 2D finite element method was employed to evaluate the plastic deformation characteristics of Al6061 alloy during T-ECAP processing. Deformation homogeneity was analyzed in term of plastic strain distribution and compared with conventional ECAP process. In addition, strain rate distributions in deformation zone, damage accumulation in sample and pressing force required for T-ECAP process were analyzed. Results showed that the plastic strain distribution in sample after T-ECAP processing is not affected significantly with the variation of friction coefficient which is in contrast with conventional ECAP where the plastic strain is increased at the bottom side of sample by increasing friction between sample and die. Also in the case of T-ECAP process, it was observed that the maximum damage factor is decreased with increasing friction coefficient. The V shaped deformation zone has been detected in T-ECAP process and the pressing force has been found to increase with increasing friction.
Finite element simulation Strain homogeneity Damage T-shaped ECAP
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