Stress-based model on work hardening and softening of materials at large strains: corrugation process of sheet

RETRACTED: Nanostructure and mechanical properties of 0–7 strained aluminum by CGP: XRD, TEM and tensile test

“…1 and the details of process procedure can be found in Refs. [19][20][21][22]. However, it should be noted that the width of corrugating dents of grooving dies is equal to the sheet thickness that reveals pure shear deformation condition through the process.…”

“…Previous papers described the advantages of ARB such as its convenience [14][15][16][17] and also its deficiencies such as imperfect bonding between layers of sheet [19] or edge cracking during rolling process [18] which limit ARB application. In 2002, Shin et al [19] invented the other SPD process of sheet; CGP process consists of repetitive shear deformation under plane strain deformation condition by utilizing alternate pressings with grooved and flat dies [19][20][21][22]. Since this method has been recently invented, there are not many works on it and it seems that more work should be carried out to investigate the evolution of material characteristics during the process.…”

“…In the presented study, for the first time a strain magnitude of 6.9 (each CGP pass imposes strain magnitude of 1.15 [21,22]) is imposed to the aluminum sheets to produce a high strength nanostructured sheet. In the following, the characteristics of produced sheets are investigated using XRD, TEM, tensile and hardness tests.…”

Mechanical Behaviour of Pure Aluminum Processed by Constrained Groove Pressing

“…Different techniques have been used to introduce large plastic strains in to bulk metals such as Equal Channel Angular Pressing (ECAP) [1][2][3], Accumulative Roll Bonding (ARB) [4][5][6][7], Repetitive Corrugation and Straitening (RCS) [8,9], Constrained Groove Pressing (CGP) [5] and Constrained Groove Rolling (CGR) [10]. Constrained groove pressing is a processing method in which a metal is subjected to an intense plastic deformation through repeated dominant shearing and pressing (flatting) of plate.…”

Microstructure development and hardening during high pressure torsion of commercially pure aluminium: Strain reversal experiments and a dislocation based model

“…Several computationally intensive methods use the evolution of cell walls [23,25], and strain gradient effects (through the inclusion of GNDs) have been incorporated to model HPT [23].…”