Accumulative Roll Bonding at Room Temperature of a Bi‐Metallic AA5754/AA6061 Composite: Impact of Strain Path on Microstructure, Texture, and Mechanical Properties

Abstract

Accumulative roll bonding (ARB) is performed at room temperature on an aluminum composite up to five rolling cycles, using two different paths: the conventional one (ARB) and the cross ARB (CARB) one consisting of a 90 rotation of the rolling direction before each rolling pass. The microstructure is refined faster by CARB than by ARB occasioning higher yield strength of the elaborated samples. Besides, CARB has the ability to delay the loss of stratification of the composite. The resulting textures are different: while ARB promotes typical rolling components (Brass {011}<211>, Goss {110}<001>, Dillamore {4 4 11}<11 11 8>), S {123}<634>), CARB promotes the ND-rotated Brass {011}<755> instead of Brass together with the S and Dillamore components. A Visco-Plastic Self-Consistent (VPSC) simulation highlights that the ND-rotated Brass had Brass and S components for origin. The ND-rotated Brass presence in the texture promotes a better mechanical isotropy of the composite sheet.

Magnetic Shielding at Low Frequencies: Application for an Aluminum/Steel Composite Elaborated by Accumulative Roll Bonding

“…The fragmentation of IF steel (hard phase) in AA6061 (soft phase) is a common phenomenon of ARBed composite with different metals or different alloys of the same materials . This results from the stresses between both bonded phases leading to the compression of the soft phase (Al 6061) and the tension of the hard phase (IF steel) hence the necking and the fragmentation of this last one along the rolling direction (see ref.…”

Modeling and simulation of laser shock waves in elasto-plastic 1D layered specimens

“…• An experimental validation of the results is necessary to properly assess the effect of the microstructure in the residual plastic strain. Co-laminated metallic specimens produced by accumulative roll bonding (ARB) would be good candidates to assess the model as the number and thickness of the layers can be finely controlled (Verstraete et al, 2018). • The current works paves the way for further developments including a description of the microstructure of a polycrystal aggregates comprising anisotropic grains with different orientations, resulting in different material properties along the direction of the shock.…”

A Combined Experiment and Crystal Plasticity FEM Study of Microstructure and Texture in Aluminium Processed by Reverse and Unidirectional Accumulative Roll-Bonding

“…In addition to experimental methods, texture modelling has become a powerful tool, but it has not been widely applied to ARB, as modelling of ARB is challenging [2,4]. Texture evolution in polycrystalline aluminium has been statistically studied by the Taylor model [5], ALAMEL model [4,6], and viscoplastic self-consistent model [7][8][9]. Unlike these "mean-field" crystal plasticity (CP) models, no homogenization is assumed in the "full-field" theory-crystal plasticity finite element method (CPFEM).…”