Effect of asymmetric rolling under high friction coefficient on recrystallization texture and plastic anisotropy of AA1050 alloy

Autor(es)

Zanchetta, Bianca Delazari ^[1] ; da Silva, Vanessa Karoline ^[2] ; Sordi, Vitor Luis ^[2] ; Rubert, Jose Benaque ^[3] ; Kliauga, Andrea Madeira ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Grad Program Mat Sci, Rod Joao Leme dos Santos Km 110, BR-18052780 Sorocaba - Brazil

^[2] Univ Fed Sao Carlos, Dept Mat Engn, Rod Washington Luis Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[3] Univ Fed Sao Carlos, Dept Mech Engn, Rod Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA; v. 29, n. 11, p. 2262-2272, NOV 2019.
• Citações Web of Science: 0

Resumo

In asymmetric rolling (ASR) the circumferential velocities of the working rolls are different. This yields a complex deformation mode with shear, compression and rigid body rotation components. The main microstructural modification is on crystallographic texture, and, for aluminium alloys, this may improve the deformability after recrystallization. This work correlated the process variables, thickness reduction per pass (TRP) and velocity ratio between the upper and bottom rolls, with the texture development and the plastic properties after annealing. Finite element (FE) simulations were performed to quantify the influence of the strain components. Experimental data on texture, and plastic anisotropy were analyzed. In the sheet centre a crystallographic rotation of the compression components about the TD (transverse direction) axis was obtained, which yielded the development of [111]//ND (normal direction) texture components. On the surfaces the local variation of the velocity gradients caused an extra rotation component about ND. This yielded the increment of rotated cube components. After annealing the main texture components at the sheet centre were maintained and the texture intensity decreased. The planar anisotropy (Delta r) was reduced but the normal anisotropy and deep drawability obtained by the Erichsen test were similar for all conditions. The most favourable reduction of Delta r was obtained at a velocity ratio of 1.5 and TRP of 10%. (AU)

• Processo FAPESP: 16/10997-0 - Processamento mecânico de materiais de grão ultrafino obtidos por deformação plástica severa
• Beneficiário: Andrea Madeira Kliauga
• Modalidade de apoio: Auxílio à Pesquisa - Regular