Severe Plastic Deformation of Al-Mg-Si Alloys Processed Through Rolling Techniques: A Review

In the present work, different combinations of rolling used by the researchers as a novel severe plastic deformation technique for the deformation of Al-Mg-Si alloys have been investigated. Reported research work is used for explaining the microstructures obtained after the processing with the help of Electron Back-Scattered Diffraction (EBSD), Transmission Electron Microscopy (TEM) and Differential Scanning Calorimetery (DSC). Based on the literatures investigated, it was found that cryorolling (CR) followed by warm rolling (WR) of Al-Mg-Si alloy provided the highest specific strength compared to all the investigated different combinations of rolling techniques available in the open literatures. The CR (70%) followed by WR (20%) at 145 degrees C followed by ageing at 125 degrees C for 60 h provided the highest hardness (130 HV) and ultimate tensile strength (400 MPa) in Al-Mg-Si alloy having a chemical composition of (Si:0.67 Fe:0.28 Cu:0.20 Mn:0.04 Mg:1.01 Cr:0.05 Zn:0.06 Ti:0.01 Al: balance). The CR followed by warm rolling helped in retaining the higher strength as well as higher ductility. It is because of dynamic recovery and precipitation evolution was dominated during the processing. The dynamic recovery was promoted the higher ductility, and precipitation evolution helped in the improvement in the strength due to precipitation strengthening. The peak ageing of warm rolled sample further helped in improvement in the mechanical properties by evolution of beta ''-precipitates.

Automated summary

This study investigates different combinations of rolling as a novel severe plastic deformation technique for Al-Mg-Si alloys. The research findings show that cryorolling followed by warm rolling provided the highest specific strength compared to other combinations investigated. The retention of higher strength and ductility in this combination is attributed to the dominance of dynamic recovery and precipitation evolution during the processing.