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Improving the mechanical properties of 2024 Al alloy by cryo rolling

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Abstract

Ultra fine grained (1 micron size) materials usually exhibit more strength. Most of the approaches to refine microstructure lead to decrease in ductility. Cryo rolling is a successful technique; samples are rolled at cryogenic temperature, to improve strength of an age hardenable alloy with minimum loss in ductility. Aging after cryo rolling ensures good strength and ductility due to bimodal structure and nano sized precipitation of S’ phase. Al 2024 alloy are partially solutionised to retain some T-phase particles, which are very effective in accumulating dislocations during cryo-rolling, and in turn promoted the precipitation of Al2CuMg precipitates with a size of 10–40 nm. The nano sized Al2CuMg precipitates and bimodal grain structure leads to simultaneous increases in strength and ductility.

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Authors and Affiliations

  1. Metallurgical and Materials Engineering Department, National Institute of Technology, Tiruchirappalli, 620 015, Tamilnadu, India

    Devaiah Doppalapudi, P. Venkatachalam, S. Ramesh Kumar & B. Ravisankar

  2. Advanced Materials Technology Department, Institute for Minerals and Materials Engineering, Bhubaneswar, 751 013, India

    K. Jayashankar

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  1. Devaiah Doppalapudi
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  2. P. Venkatachalam
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  3. S. Ramesh Kumar
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  4. B. Ravisankar
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  5. K. Jayashankar
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Correspondence to B. Ravisankar.

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Doppalapudi, D., Venkatachalam, P., Ramesh Kumar, S. et al. Improving the mechanical properties of 2024 Al alloy by cryo rolling. Trans Indian Inst Met 63, 31–34 (2010). https://doi.org/10.1007/s12666-010-0005-1

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  • DOI: https://doi.org/10.1007/s12666-010-0005-1

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