Abstract
In the present work, cryorolling (CR) (rolling temperature is − 196 °C) followed by annealing (AN) (100–400 °C for 1 h) of 6082 Al alloy has been performed. The main objective of this study was to investigate the thermal stability of the ultrafine-grained 6082 Al alloy, for higher temperature applications. The mechanical properties of the CR and the CR + AN 6082 Al alloy were investigated and correlated with the microstructure with the help of a transmission electron microscope (TEM). The hardness and the tensile strength of the CR + AN (150 °C) 6082 Al alloy were significantly improved up to 95% and 40%, respectively, when compared to the solution-treated (ST) 6082 Al alloy. The main reason behind the mechanical strength improvement was dislocation strengthening and precipitation strengthening. Thermal stability of the CR 6082 Al alloy was found up to a high annealing temperature of 300 °C due to the pinning of grain boundaries by precipitates evaluation during annealing by Zener drag effect. The formation of β″-phase, β′-phase and stable β-phase occurred at the annealing temperatures of 175 °C for 1 h, 200 °C for 1 h and 250 °C for 1 h, respectively.
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs12666-019-01722-z/MediaObjects/12666_2019_1722_Fig1_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs12666-019-01722-z/MediaObjects/12666_2019_1722_Fig2_HTML.png)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs12666-019-01722-z/MediaObjects/12666_2019_1722_Fig3_HTML.jpg)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs12666-019-01722-z/MediaObjects/12666_2019_1722_Fig4_HTML.jpg)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs12666-019-01722-z/MediaObjects/12666_2019_1722_Fig5_HTML.jpg)
![](http://media.springernature.com/m312/springer-static/image/art%3A10.1007%2Fs12666-019-01722-z/MediaObjects/12666_2019_1722_Fig6_HTML.png)
Similar content being viewed by others
References
Saito Y, Tsuji N, Utsonomis H, and Sakai T, Acta Mater, 47 (1999) 579.
Valiev R Z, Islamgaliev R K, and Alexandrov I V, Prog Mater Sci 45 (2000) 103.
Kim J K, Kim H K, Park J W, and Kim W J, Scripta Mater 53 (2005) 1207.
Loucif A, Figueiredo R B, Baudin T, Brisset F, and Langdon T G, Mater Sci Eng A 527 (2010) 4864.
Shanmugasundaram T, Murty B S, and Sarma V S, Scripta Mater 54 (2006) 2013.
Lee Y B, Shin D H, Park K T, and Nam W J, Scripta Mater 51 (2004) 355.
Cheng S, Zao Y H, Zhu Y T, and Ma E, Acta Mater 55 (2007) 5822.
Panigrahi S K, and Jayaganthan R, Mater Sci Forum 584–586 (2008) 734.
Panigrahi S K, and Jayaganthan R, Mater Sci Eng A 492 (2008) 300.
Rao P N, Panigrahi S K, and Jayaganthan R, Mater Sci Tech 26 (2010) 371.
Kang U G, Lee J C, Jeong S W, and Nam W J, J Mater Sci 45 (2010) 4739.
Dobatkin S V, Zakharov V V, and Rokhlin L L, Mater Sci Forum 503–504 (2006) 399.
Nurislamova G, Sauvage X, Murashkin M, Islamgaliev R, and Valiev R, Phil Mag Lett 88 (2008) 459.
Kumar N, Goel S, Jayaganthan R, and Brokmeier H G, Metallography, Microstructure, and Analysis 4 (2015) 411.
Morris D G, and Munoz-Morris M A, Acta Mater 50 (2002) 4047.
Yassar R S, Field D P, and Weiland H, Metall Mater Trans A 36A (2005) 2059.
Sushanta Kumar Panigrahi • R. Jayaganthan J Mater Sci (2010) 45:5624.
Urrutia I G, Munoz-Morris M A, and Morris D G, Mater Sci Eng A 394 (2005) 399.
Ou B L, Yang J G, and Wei M Y, Metall Mater Trans A 38A (2007) 1960.
Doherty R D, Mater Sci 16 (1982) 1.
Esmaeili S, Wang S X, Lloyd D J, and Poole W J, Metall Mater Trans A 34A (2003) 751.
Weatherly G C, Perovic A, Mukhopadhyay N K, Llyod D J, and Perovic D D, Metall Mater Trans A 32 (2001) 213.
Acknowledgements
The authors appreciate and specially acknowledge the financial support from the Department of Defense via grant Contract # W911NF-15-1-0457 under the direct supervision of Patricia Huff (HBCU/MI Program Manager, USA Army Research Office).
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Kumar, N., Owolabi, G.M., Jayaganthan, R. et al. Effect of Annealing on Mechanical Properties and Metallurgical Factors of Ultrafine-Grained 6082 Al Alloy. Trans Indian Inst Met 72, 2523–2531 (2019). https://doi.org/10.1007/s12666-019-01722-z
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12666-019-01722-z