Texture Stability and Transition in an Accumulative Roll-Bonding-Processed Aluminum Single Crystal
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evolution in metals processed by accumulative roll-bonding (ARB) is complicated due to the repetitive cutting, stacking, and roll-bonding. Extensive experimental studies have revealed the textural transition from shear texture to rolling texture in ARB-processed metals and alloys.[1,2] Texture modeling, unlike experimental methods, provides a unique opportunity to trace textural evolution. However, the cutting, stacking, and roll-bonding make texture modeling of ARB challenging, and accordingly, only a few numerical studies have been attempted. The single-component full-constraint Taylor model has been applied to
HUI WANG, CHENG LU, and KIET TIEU are with the School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522, Australia. Contact e-mails: [email protected]; [email protected] PEITANG WEI is with the State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, China. HAILIANG YU is with the Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China. Manuscript submitted July 29, 2018.
METALLURGICAL AND MATERIALS TRANSACTIONS A
ARB-processed AA1100,[3] and the ALAMEL model to AA3003[4] and AA1070,[1] and the viscoplastic self-consistent model to AA5754.[5–7] Homogenization at different levels is assumed in these ‘mean-field’ crystal plasticity (CP) models, and accordingly, local heterogeneities cannot be accurately predicted. The crystal plasticity finite element (CPFE) model, a more sophisticated scheme, has also been applied to ARB.[8–10] The local heterogeneities can be accessed by the so-called full-field CPFE model that does not assume homogenization. However, the CPFE simulations in References 8 through 10 did not follow the real ARB process, and the rolling was approximated by plain strain compression. In the present study, the CPFE model is used to simulate the textural evolution in an ARB-processed aluminum single crystal. By following the real ARB process, the simulation was conducted up to nine cycles. The predictions have been validated by experimental observations. The formation, destruction, and preservation of texture components (0 0 1)[1 1 0] and ð4 4 11Þ½11 11 8 were identified and investigated. The CPFE simulation of an aluminum single crystal was designed to match the ARB experiment in Reference 11. A 2D finite element (FE) model was developed under the assumption of plain strain conditions, which has been widely accepted in analysis of rolling.[7,12,13] The rolls were considered as analytic rigid bodies with diameters of 310 mm, and the thickness reduction was 50% in each cycle. The element type was CPE4R, enhanced hourglass control was used, and mesh calibration was performed. Mapping solution, a remeshing analysis technique,[5] was used in the FE model to transfer the deformation solution from the deformed mesh to a new mesh for the next cycle. The FE model of ARB and mapping solution have been given in detail in an
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