Tailored Heat Treated Accumulative Roll Bonded Aluminum Blanks: Microstructure and Mechanical Behavior

Formability of Ultrafine Grained Metals Produced by Severe Plastic Deformation–An Overview

“…The formability in bending and corresponding failure modes have been investigated for AA1050 and AA6016 processed by ARB with some of the results being illustrated in Figure . It shows that the forming forces increase with the number of ARB cycles, which reflects the increasing strength of the material, whereas the bending angle at fracture decrease as compared to the coarse grained state.…”

“…Even though there are only few experimental results on UFG materials available in literature so far, it seems that heat treatments are generally required to achieve small bending radii . This appears to be a huge limitation, yet, heat treatments prior to bending of sheets are less problematic as compared to other sheet forming processes.…”

“…A viable damage model not only has to capture the effect of large hydrostatic stresses on the damage accumulation but also non monotonic load paths and recovery of damage after strain path changes during SPD and subsequent forming operations. This is illustrated by the fact that the formability in uniaxial tension can actually increasing with the number of ARB cycles or ECAP passes, even in case of monotonic shear during SPD (ECAP route A) . In view of the above, it is unclear whether damage models solely based on standard mechanical tests performed with coarse grained strain free material will be able to quantitatively capture these effects.…”

Metal forming beyond shaping: Predicting and setting product properties

“…In this context, the Tailored Heat Treated Blanks (THTB) technology [222] was applied to nanocrystalline aluminum in order to locally regain the ductility and enhance the formability of the blank using a local short term heat treatment [144]. For nanocrystalline 6000 series aluminum besides the well-known dissolution of the precipitates, there is another softening effect, namely local recrystallization [133]. The combination of ARB and THTB allows the production of tailored sheet metal with a specific layer structure and property distribution optimized for the subsequent forming process and the final product properties.…”

Corrosion in biomass combustion: A materials selection analysis and its interaction with corrosion mechanisms and mitigation strategies

“…The top-down approach has been developed mainly by severe plastic deformation (SPD) processes such as equal channel angular pressing (ECAP), accumulative roll-bonding (ARB) and high pressure torsion (HPT) [136,137]. These processes are capable of producing bulk nanocrystalline metallic alloys for structural applications [138].…”