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Microstructure and Texture of Al-2.5wt.%Mg Processed by Combining Accumulative Roll Bonding and Conventional Rolling

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Abstract

Evolution of microstructure and texture during severe deformation and annealing was studied in Al-2.5%Mg alloy processed by two different routes, namely, monotonic Accumulative Roll Bonding (ARB) and a hybrid route combining ARB and conventional rolling (CR). For this purpose Al-2.5%Mg sheets were subjected to 5 cycles of monotonic ARB (equivalent strain (εeq) = 4.0) processing while in the hybrid route (ARB + CR) 3 cycle ARB-processed sheets were further deformed by conventional rolling to 75% reduction in thickness (εeq = 4.0). Although formation of ultrafine structure was observed in the two processing routes, the monotonic ARB—processed material showed finer microstructure but weak texture as compared to the ARB + CR—processed material. After complete recrystallization, the ARB + CR-processed material showed weak cube texture ({001}〈100〉) but the cube component was almost negligible in the monotonic ARB-processed material-processed material. However, the ND-rotated cube components were stronger in the monotonic ARB-processed material-processed material. The observed differences in the microstructure and texture evolution during deformation and annealing could be explained by the characteristic differences of the two processing routes.

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Acknowledgment

The authors would like to acknowledge the financial support of DST, India (Grant No. SR/FTP/ETA-126/2010) for the research work.

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  1. Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad, Ordnance Factory Estate, Yeddumailaram, Hyderabad, 502205, AP, India

    J. R. Gatti & P. P. Bhattacharjee

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  1. J. R. Gatti
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  2. P. P. Bhattacharjee
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Correspondence to P. P. Bhattacharjee.

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Gatti, J.R., Bhattacharjee, P.P. Microstructure and Texture of Al-2.5wt.%Mg Processed by Combining Accumulative Roll Bonding and Conventional Rolling. J. of Materi Eng and Perform 23, 4453–4462 (2014). https://doi.org/10.1007/s11665-014-1237-8

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  • DOI: https://doi.org/10.1007/s11665-014-1237-8

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