Analysis of the Strain Distribution and Texture Measurements in Asymmetric Rolling (AR) and Asymmetric Accumulative Roll Bonding (AARB)

Abstract:

Severe plastic deformation (SPD) with strong shear component is required to promote both grain refinement and texture randomization. When Asymmetric rolling (AR) is applied as asymmetric accumulative roll bonding (AARB), it enables the production of architectured microstructures and metallic composites. Finite element (FE) simulations of AR and AARB were employed to understand the influence of pass thickness reduction (PTR) on the through thickness variation of the velocity gradient. The influence of the PTR up to a total thickness reduction of 50% and the effect of a single 50% reduction step in a bi-layer bonding condition was analyzed. The influence of these process parameters on the strain and rigid body rotation components was compared with the experimental data obtained on an AA1050 aluminum. A better shear to compression ratio across the sheet thickness is achieved by PTRs lower than 30%; at a PTR of 50% the texture is dominated by the frictional shear generated at the roll-sheet interface and the process has a stronger compressive character. This indicates that simple ARB followed by AR with smaller PTRs should generate a better shear distribution than AARB alone.

• Periodical: Materials Science Forum (Volume 1016)
• Pages: 715-724
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1016.715
• Online since: January 2021
• Authors: Renan P. Godoi, Bianca D. Zanquetta, José Benaque Rubert, Raul E. Bolmaro, Martina C. Avalos, Vitor Luiz Sordi, Andrea Madeira Kliauga*
• Keywords: AA11050 Aluminum, Accumulative Asymmetric Roll Bonding, Asymmetric Rolling, Strain Distribution, Texture

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