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Microstructure and Mechanical Properties of the AA7075T7352 Aluminum Alloy

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Abstract

Microstructure evolution and their effects on mechanical behaviors of the AA7075T7352 aluminum alloy are reported. Phase analysis was done by X-ray diffraction and transmission electron microscope. The presence of the GP-Zones, ɳ', and ɳ, along with Al2Cu, Al2CuMg, and Al3Zr, was noticed. Mechanical characterizations were done with the help of a tensile test and Vickers microhardness. Flow behaviors were studied to evaluate the impact of second-phase particles in the properties. Strain hardening exponents along with UTS/YS ratio have been calculated. Flow curve fitting follows Ludwigson relationship with two distinct slopes. Dislocation loops and forest dislocation were noticed in the low strain range, while dense dislocation walls in the high strain range. Variation in flow parameters is due to the random spread of precipitate particles in the matrix. The material fails by mixed mode of ductile and brittle fractures.

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Acknowledgements

The authors would like to thank Dr. Manish Kumar Singh and Mr. Lalit Kumar Singh of the Department of Metallurgical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, India, for their help in microscopy works. This research is funded by the Indian Institute of Technology (BHU), Varanasi.

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Authors and Affiliations

  1. Department of Metallurgical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India

    Roopchand Tandon, R. Manna & R. K. Mandal

  2. Department of Metallurgical and Materials Engineering, National Institute of Technology, Rourkela, 769008, India

    K. K. Mehta

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  1. Roopchand Tandon
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  2. K. K. Mehta
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Correspondence to R. Manna.

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Tandon, R., Mehta, K.K., Manna, R. et al. Microstructure and Mechanical Properties of the AA7075T7352 Aluminum Alloy. Trans Indian Inst Met 74, 1509–1520 (2021). https://doi.org/10.1007/s12666-021-02222-9

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