Plastic anisotropy of ultrafine grained aluminium alloys produced by accumulative roll bonding

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2010, Vol.527 (13), p.3271-3278
• Main Authors: Beausir, B., Scharnweber, J., Jaschinski, J., Brokmeier, H.-G., Oertel, C.-G., Skrotzki, W.
• Format: Article
• Language: English
• Subjects: Accumulative roll bonding (ARB); Aluminium alloys; Applied sciences; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Elasticity. Plasticity; Exact sciences and technology; Lankford parameter; Materials science; Mechanical anisotropy; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Modelling; Neutron diffraction and scattering; Other heat and thermomechanical treatments; Physics; Single-crystal and powder diffraction; Structure of solids and liquids; crystallography; Texture; Treatment of materials and its effects on microstructure and properties
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2010.02.006

The plastic anisotropy of ultrafine grained aluminium alloys AA1050 and AA6016 produced by accumulative roll bonding (ARB) has been investigated by tensile deformation via the Lankford parameter. The average normal and planar anisotropies slightly increase (from 0.6 to 0.9) and decrease (from 0.6 to −0.7) as a function of ARB cycles, respectively. The global textures measured by neutron diffraction are used to simulate the Lankford and anisotropy parameters of the plates after 0, 2, 4, 6 and 8 ARB cycles with the help of the viscoplastic polycrystal self-consistent model. Simulation results are compared with those from experiment and discussed with regard to texture, strain rate sensitivity, grain shape and slip system activity.