Comparison of the Annealing Heat-Treated Microstructure and Hardness of the AA2024-T4 and AA6061-T6 Alloys

Subject Areas : Journal of Environmental Friendly Materials

A Anbarzadeh ¹ , H Sabet ² , A Granmayeh Urmia ³

1 - Department of Materials Engineering- South Tehran Branch, Islamic Azad University, Tehran, Iran
2 - Department of Materials Engineering- Karaj Branch, Islamic Azad University, Karaj, Iran
3 - Department of Materials Engineering- South Tehran Branch, Islamic Azad University, Tehran, Iran

Received: 2022-12-16 Accepted : 2023-04-25 Published : 2023-06-01

Keywords:

Abstract :

Precipitation Hardenable Aluminum Alloys are suitable alternatives in electric vehicle bodies due to their lower specific weight compared to steel. Therefore, the development and understanding of the properties of aluminum alloys help to develop electric vehicles, reduce greenhouse gas emissions, and control global warming. In this research, we investigated the heat treatment of AA2024-T4 and AA6061-T6 alloys at a temperature of 453 °C for 210 minutes in a tube furnace with a heating rate of 5 oC/min in a vacuum (7.5×10-13 Torr). The alloys were assessed by optical microscopy (OM), scanning electron microscopy (SEM), and hardness test. The effect of heat treatment was investigated on the particle size as well as the phases. The particle diameter and hardness value of AA2024-T4 decreased after heat treatment. The number of precipitates in AA2024-T4 increased after heat treatment. Precipitates size in AA6061-T6 alloy remained almost unchanged after the heat treatment.

References:

[1] J.C. Williams, E.A. Starke, Acta Mater, 51 (2003), 5775.

[2] Aerospace Specification Metals Inc (ASM). ASM Mater. Data Sheet-800, 398-4345. Aluminum 2024-T4. (1987).

[3] J. Lee, Horizontal Single Belt Casting Process of AA2024. A Numerical and Physical Modeling Study, Master of Engineering thesis, McGill University, Montreal, Canada (2019).

[4] D. C. Ko, D. H. Ko, J. H. Kim, J. H. Park, Adv. Mech. Eng., 9(2), (2017), 1.

[5] Aerospace Specification Metals Inc (ASM). ASM Mater. Data Sheet. 800 398-4345. Aluminum 6061-T6 (1987).

[6] S. Khisheh, K. Khalili, M. Azadi, V. Zaker Hendoabadi, The J. ENG. Res., Vol. 50 (2018), 55.

[7] S. H. Mousavi Anijdan, D. Sadeghi-Nezhad, H. lee, N. park, M. J. Nayyeri, H. R. Jafarian, A. R. Eivani, J. Mater. Res. Technol., Vol 13, (2021), 798.

[8] Aerospace Specification Metals Inc (ASM). ASM Mater. Data Sheet-800 398-4345. Aluminum 2024-O, (1987).

[9] Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric) ASTM Designation: B209M-14, (2014).

[10] H. Baker, ASM Handbook, Vol3, Chap 3, (1993), 24.

[11] E. F. Bradley, Metals Park, Ohio, (1988), 22.

[12] Aerospace Specification Metals Inc (ASM), ASM Mater. Data Sheet- 800-398-4345, Aluminum 6061-O. (1987).

[13] A. Anbarzadeh, H. Sabet, M. Abbasi. Mater. Latt., 178, (2016), 280.

[14] A. Anbarzadeh, H. Sabet, A. R. Granmayeh, JWSTI, 8(1), (2022), 1.

[15] NBSIR 83-2669. (NBS/NASA).  NBS: Processing/Microstructure/Property relationships in 2024 Aluminum alloy plates. U. S. Department of commerce National Bureau of Standards, (1983).

[16] A. Edgar, J. R. Starke: Treatis Mater. Sci. Technol., Vol. 31, Chap. 2, (1989), 48.

[17] Aerospace Specification Metals Inc (ASM). ASM Mater. Data Sheet- 800 398-4345. Aluminum 6061-O (1987).

[18] L. E. Mondolfo: Aluminum Alloys Structure and Properties, Chap. 4, (1973).

[19] M. I. Saleh, T. I. Khan, H. J. Roven, Procedia Chem., 19, (2016), 517.