abstract
Asymmetric rolling is a forming process that has raised interest among researchers due to the significant improvements it introduces to the mechanical response of metals. The main objective of the present work is to perform a numerical study on asymmetrical rolled aluminum alloy sheets to identify and correlate the effect of the additional shear strain component on the material formability, tensile strength, and texture orientations development during multi-pass metal forming. Conventional (CR), asymmetric continuous (ASR-C), and asymmetric rolling-reverse (ASR-R) simulations were carried out using the visco-plastic self-consistent (VPSC) code. For the ASR process, two different shear strain values were prescribed. Moreover, two hardening models were considered: a Voce-type law and a dislocation-based model that accounts for strain path changes during metal forming. Results showed that the ASR process is able to improve the plastic strain ratio and tensile strength. The ASR-C revealed better results, although the expected shear orientations are only evident in the ASR-R process.
keywords
PATH CHANGES EXPERIMENTS; PLASTIC ANISOTROPY; CRYSTALLOGRAPHIC TEXTURE; MECHANICAL-PROPERTIES; DEFORMATION TEXTURE; MODEL; POLYCRYSTALS; PREDICTION; EVOLUTION; BEHAVIOR
subject category
Materials Science; Metallurgy & Metallurgical Engineering
authors
Graca, A; Vincze, G; Wen, W; Butuc, MC; Lopes, AB
our authors
Augusto Luís Barros Lopes
Assistant Professoracknowledgements
This work was supported by the projects POCI-01-0145-FEDER-032362 (PTDC/EME-ESP/32362/2017) financed by the Operational Program for Competitiveness and Internationalization, in its FEDER/FNR component, and the Portuguese Foundation of Science and Technology (FCT), in its State Budget component (OE), UIDB/00481/2020 and UIDP/00481/2020-FCT-Portuguese Foundation of Science and Technology; and CENTRO-01-0145-FEDER-022083-Centro Portugal Regional Operational Program (Centro2020), under the PORTUGAL 2020 Partnership Agreement, through the European Regional Development Fund.