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Severe plastic deformation (SPD) is a method used to obtain nano-structured and ultra-fine-grained materials. There are many methods used for severe plastic deformation of tubular materials. One of these methods is parallel tubular channel angular pressing (PTCAP). In this study, deformation of tubular parts was investigated by using double pass parallel tubular channel angular pressing (DP-PTCAP) method. In the analysis, 5 different channel angles, 4 different cross section expansion rates and 4 different dimensionless lengths were used. The effects of these parameters on the stress, plastic strain and forming force of the tubular parts obtained were analyzed by finite element method. AA6061 material was used in the study. As a result of the analysis, effective strain, forming force and stress in material were decreased with increasing channel angle. It was determined that the plastic strain of the materials obtained with double pass dies was higher than single pass dies. As a result, it can be said that the grain structure of the materials obtained with double pass dies is finer grained than single pass dies.

Boruların Çift Geçişli Paralel Tüp Kanal Açısal Presleme (DP- PTCAP) Yöntemi ile Aşırı Plastik Deformasyon Analizi