Abstract:  Molecular dynamics was used to analyze the deformation behavior and polycrystal development of single-crystal aluminum during equal channel angular pressing (ECAP). At 320 K, an ECAP die with a curvature angle (Ψ) of 200 and a channel angle (φ) of 900 processed three samples with various beginning crystallographic orientations. The samples were orientated so that the extrusion direction was parallel to the [100], [110], and [111] directions (ED). Due to the strong compression force, shear strain was the major mechanism of deformation during ECAP, with normal strain present before entering the deformation zone. The sample oriented along the ED in the [100] direction had substantial grain fragmentation, the largest lattice rotation, but the lowest dislocation density and shear strain, whereas the sample orientated in the [111] direction had the opposite findings. The number of active slip systems, the quantity of shear strain, and grain rotation angle were all shown to be related, with the majority of lattice rotation occurring in the transverse direction. In addition, the deformation and grain fragmentation mechanisms that take place in the deformation zone were studied. Finally, the model may give findings that are similar to those found in the literature through experiments. For 4-passes of route Bc at 2350C, pure Mg billets were treated utilizing two ECAP dies with internal channel angles of 900 and 1200. The texture weakened in intensity after 1-Pass and 2-Passes, resembling the B fiber texture of optimum orientation {0001} <uvjw>. When the number of ECAP passes was increased to four, the result was a significant strong texture with more than 26 times the randomness of the intense {0001} poles.

Keywords: Pure Magnesium; Severe plastic deformation; Equal channel angular pressing Die angle; Microstructural evolution; Crystallographic texture.

| DOI: 10.17148/IARJSET.2022.9328