EFFECT OF BRINE QUENCHANTS AND PRECIPITATION HARDENING ON THE MECHANICAL PROPERTIES OF ALUMINIUM ALLOY (AA6061)

Hawre Fattah Amin; Rekawt R.  Amin; Abbas I.  Khwakaram; Omer S.  Mahmood; Pshtiwan m. Karim

doi:10.30572/2018/KJE/160307

Authors

Hawre Fattah Amin Sulaimani Polytechnic University
Rekawt R. Amin Assistant Lecturer, Sulaimani Technical Institute, Sulaimani Polytechnic University, Sulaimani, Iraq
Abbas I. Khwakaram Assistant Lecturer, Sulaimani Technical Institute, Sulaimani Polytechnic University, Sulaimani, Iraq
Omer S. Mahmood Lecturer, Mechanical and Manufacturing Engineering, Sulaimani Polytechnic University, Sulaimani, Iraq
Pshtiwan m. Karim Assistant Lecturer, Sulaimani Technical Institute, Sulaimani Polytechnic University, Sulaimani, Iraq

DOI:

https://doi.org/10.30572/2018/KJE/160307

Keywords:

Aluminium alloy 6061, Heat treatment, Precipitation hardening, Quenching, Brine

Abstract

This article demonstrates the influence of varying quenchants and precipitation hardening on the mechanical characteristics of Aluminium alloy 6061. Three samples were chosen for the impact test. Solution treatment was performed at 540°C for 2 hours and then cooled at three different brine concentrations (3%, 7%, and 10%). As a result, brine (3%) had the best result with the lowest rate of shock absorption (18.31 J); therefore, for this study, brine (3%) was selected as the quenching medium. All specimens for the tensile, impact, and hardness tests were solution-treated at 540 °C for two hours, subsequently cooled in Brin 3% to ambient temperature, and artificially aged at 180 °C. for 1,2, and 4 hours, at 195°C for 1,2, and 4 hours, and at 210°C for 1,2, and 4 hours. Due to the formation of finely dispersed grains, notable increases in strength and hardness were seen alongside a decrease in ductility. The overall best result achieved was by precipitation hardening at 210°C for 2 hours, which increased the ultimate tensile strength to 340.3 MPa compared to the as- received and annealed samples values which were 260 MPa and 152.02 MPa respectively. In addition, Hardness value increased from annealed condition (18.23 HRB) to (44.14 HRB)

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References

Abubakre O., Mamaki U., Muriana R. (2009) ' Investigation of the quenching properties of selected media on 6061 Aluminium alloy ', Journal of Minerals & Materials Characterization & Engineering. DOI:10.4236/jmmce.2009.84027 .

Akande S., Ajaiyeoba O. E., Azeez T. M., Ikumapayi O. M., Akinlabi S. A., Akinlabi E.T. (2022). ' Investigating the precipitation hardening of 2024 aluminium alloy under different quenching media ', Materials Today: Proceedings, 6(Part 6), pp. 4271-4274. Doi: 10.1016/j.matpr.2022.04.775 .

Akbar H. I., Surojo E., Ariawan D., Prabow A. R. (2020). ' Experimental study of quenching agents on Al6061–Al2O3 composite: Effects of quenching treatment to microstructure and hardness characteristics 'Results in Engineering, Volume 6,100105. Doi: 10.1016/j.rineng.2020.100105.

Das S.K. & Yin W. (2007). ' The worldwide Aluminium economy: The current state of the industry ', JOM. 59. 57-63. 10.1007/s11837-007-0142-0.

Davis JR. (2001). ' Alloying: understanding the basics: ASM international; '. Doi: 10.31399/asm.tb.aub.9781627082976 .

Doi: 10.1016/j.wear.2005.02.115.

Liu Y., Zhu B., Wang Y., Li S., Zhang Y. (2020). ' Fast solution heat treatment of high strength aluminum alloy sheets in radiant heating furnace during hot stamping. ' International Journal of Lightweight Materials and Manufacture, Volume 3, Issue 1, Pages 20-25, Doi: 10.1016/j.ijlmm.2019.11.004 .

Moy C. K.S., Weiss M., Xia J., Sha G., Ringer S. P., Ranzi G., (2012). ' Influence of heat treatment on the microstructure, texture, and formability of 2024 aluminium alloy ', Materials Science and Engineering: A, pp. 48-60. Doi: 10.1016/j.msea.2012.04.113.

Naronikar AH., Jamadagni HNA., Simha A., Saikiran B. (2018). ' Optimizing the Heat Treatment Parameters of Al-6061 Required for Better Formability '. Materials Today: Proceedings. 2018;5:24240-7. Doi:10.1016/j.matpr.2018.10.219 .

Ramesha C.S., Khan A.R. Anwar, Ravikumar N., Savanprabhu P. (2005). ' Prediction of wear coefficient of Al6061–TiO2 composites ', Elsevier Journal of Wear Volume 259, Issues 1–6.

Rashid, W. T. (2023) “MECHANICAL PROPERTIES CHARACTERIZATION OF AL- 7075 / PHOSPHOGYPSUM METAL MATRIX COMPOSITES”, Kufa Journal of Engineering. Kufa, Najaf, IRAQ, 14(1), pp. 67–80. Doi:10.30572/2018/KJE/140105 .

Staszczyk A., Sawicki J., Adamczyk-Cieslak B. (2019). ' A Study of Second-Phase Precipitates and Dispersoid Particles in 2024 Aluminium Alloy after Different Ageingg Treatments. ', Materials. 12. 4168. 10.3390/ma12244168.Doi:10.3390/ma12244168 .

Sun L., Guo Y., Chen L., Zhao G.(2021). ' Effects of solution and ageing treatments on the microstructure and mechanical properties of cold rolled 2024 Al alloy sheet.', Journal of materials research and technology. 12, pp. 1126-42. Doi:10.1016/j.jmrt.2021.03.051.

Tan CF., Radzai SM. (2009).' Effect of hardness test on precipitation hardening Aluminium alloy 6061-T6 ', Chiang Mai Journal of Science. 36:276-86.

Westermann I., Pedersen K.O., Børvik T., Hopperstad O.S. (2016). ' Work-hardening and ductility of artificially aged AA6060 aluminium alloy.' , Mechanics of Materials, 97, pp. 100-117. Doi: 10.1016/j.mechmat.2016.02.017.