A numerical and experimental study on tubular channel angular pressing (TCAP) process

Tubular channel angular pressing (TCAP) is a new and novel severe plastic deformation (SPD) technique suitable for fabrication of bulk nanograined tubular materials. There are several parameters in TCAP process. The present paper investigates the effects of curvature angles, deformation ratio (= maximum radius during TCAP/ initial radius) and deformation direction on the plastic deformation behavior, strain homogeneity and required loads in TCAP processing. The results showed that the higher curvature angles (ψ1 and ψ3) leads to better strain homogeneity while have not any significant effect on the process loads. Also in the second curvature angle of 90° the best condition is achieved from point of view of good strain homogeneity and lower load requiring compared to lower angles. Investigation on deformation direction showed that inlet deformation direction cause tube thinning at the end of process and using inlet case is not recommended.