UPSI Digital Repository (UDRep)
Start | FAQ | About
Menu Icon

QR Code Link :

Type :article
Subject :Q Science (General)
ISSN :1823-7010
Main Author :Che Nor Aiza Jaafar
Additional Authors :Ismail Zainol
Title :Investigation on the aging responses and fracture surface morphology of Al- Mg -Si alloys with different weight percent of Mg and Si compositions
Place of Production :Tanjung Malim
Publisher :Fakulti Sains dan Matematik
Year of Publication :2021
Notes :Malaysian Journal of Microscopy
Corporate Name :Universiti Pendidikan Sultan Idris
HTTP Link :Click to view web link

Abstract : Universiti Pendidikan Sultan Idris
The mechanical properties of Al-Mg-Si alloys are depending upon many factors such as alloy composition, casting method, heat treatment procedures (solution treatment temperature, aging time and temperature) and other parameters which could affects the aging response and behaviors. In this study, aging response and fracture surface morphology of two Al-Mg-Si alloys with different wt% of Mg and Si compositions of Al-Mg-Si alloys were investigated. The experimental procedures were started with a heat treatment process where firstly both alloy samples were solution treated at 540 �C for 30 minutes, followed by quenched into cold water. The solution treated alloy samples were artificially aged at an elevated temperature of 170 oC for 0.1 to 100 hours. The aging response and mechanical properties were examined by Vickers hardness and tensile test. The surface fractured morphology from the tensile specimen in peak-aged condition at 170 �C was carried out using a field emission scanning electron microscope (FESEM). It was found that the composition of Mg and Si present in the alloys affects the aging response and mechanical properties. As the composition of Mg and Si increased, the mechanical properties of the alloys also increased and gave a stronger aging response to the alloys. The FESEM analysis exhibited that the alloy P which contained higher composition of Mg and Si showed a less ductile behaviour and lower elongation properties, hence the results of the FESEM analysis are in line with the results of hardness and tensile test. ? 2021, Microscopy Society of Malaysia. All rights reserved.

References

Dowling, J. M., & Martin, J. W. (1976). The influence of MN additions on the deformation behaviour of an AlMgSi alloy. Acta Metallurgica, 24(12), 1147-1153. doi:10.1016/0001-6160(76)90032-8

Edwards, G. A., Stiller, K., Dunlop, G. L., & Couper, M. J. (1998). The precipitation sequence in al-mg-si alloys. Acta Materialia, 46(11), 3893-3904. doi:10.1016/S1359-6454(98)00059-7

Gaber, A., Gaffar, M. A., Mostafa, M. S., & Zeid, E. F. A. (2007). Precipitation kinetics of al-1.12 Mg2Si-0.35 si and al-1.07 Mg2Si-0.33 cu alloys. Journal of Alloys and Compounds, 429(1-2), 167-175. doi:10.1016/j.jallcom.2006.04.021

Jaafar, A., Rahmat, A., Hussain, Z., & Zainol, I. (2011). Effect of mg, si and cu content on the microstructure of dilute 6000 series aluminium alloys. Journal of Alloys and Compounds, 509(35), 8632-8640. doi:10.1016/j.jallcom.2011.05.061

Lai, Y. X., Fan, W., Yin, M. J., Wu, C. L., & Chen, J. H. (2020). Structures and formation mechanisms of dislocation-induced precipitates in relation to the age-hardening responses of al-mg-si alloys. Journal of Materials Science and Technology, 41, 127-138. doi:10.1016/j.jmst.2019.11.001

Lai, Y. X., Jiang, B. C., Liu, C. H., Chen, Z. K., Wu, C. L., & Chen, J. H. (2017). Low-alloy-correlated reversal of the precipitation sequence in al-mg-si alloys. Journal of Alloys and Compounds, 701, 94-98. doi:10.1016/j.jallcom.2017.01.095

Odoh, D. N. (2017). Effect of Alloy Composition on the Hot Deformation Behavior, Extrudability and Mechanical Properties of AA6xxx Aluminum Alloys, , 98-103. Retrieved from www.scopus.com

Polmear, I. J. (1995). Light alloys: Metallurgy of the light metals. Light Alloys: Metallurgy of the Light Metals, Retrieved from www.scopus.com

Thomason, P. F. (1990). Ductile Fracture of Metals, Retrieved from www.scopus.com

Torster, M., Ehlers, F. J. H., Marioara, C. D., Andersen, S. J., & Holmestad, R. (2012). Applying precipitate-host lattice coherency for compositional determination of precipitates in al-mg-si-cu alloys. Philosophical Magazine, 92(31), 3833-3856. doi:10.1080/14786435.2012.693214

Wang, Y., Liao, H., Wu, Y., & Yang, J. (2014). Effect of si content on microstructure and mechanical properties of al-si-mg alloys. Materials and Design, 53, 634-638. doi:10.1016/j.matdes.2013.07.067

Weng, Y., Jia, Z., Ding, L., Pan, Y., Liu, Y., & Liu, Q. (2017). Effect of ag and cu additions on natural aging and precipitation hardening behavior in al-mg-si alloys. Journal of Alloys and Compounds, 695, 2444-2452. doi:10.1016/j.jallcom.2016.11.140

Yuan, B., Guo, M., Wu, Y., Zhang, J., Zhuang, L., & Lavernia, E. J. (2019). Influence of treatment pathways on the precipitation behaviors of al-mg-si-cu-(zn)-mn alloys. Journal of Alloys and Compounds, 797, 26-38. doi:10.1016/j.jallcom.2019.05.055

Zhang, S. -., Zeng, W. -., Yang, W. -., Shi, C. -., & Wang, H. -. (2014). Ageing response of a al-cu-li 2198 alloy. Materials and Design, 63, 368-374. doi:10.1016/j.matdes.2014.04.063

Zhang, X., Liu, M., Sun, H., & Banhart, J. (2019). Influence of sn on the age hardening behavior of Al–Mg–Si alloys at different temperatures. Materialia, 8 doi:10.1016/j.mtla.2019.100441

Zi, Y., Zeqin, L., Leyvraz, D., & Banhart, J. (2019). Effect of pre-ageing on natural secondary ageing and paint bake hardening in Al–Mg–Si alloys. Materialia, 7 doi:10.1016/j.mtla.2019.100413

Zuo, X., & Jing, Y. (2009). Investigation of the age hardening behaviour of 6063 aluminium alloys refined with ti, RE and B. Journal of Materials Processing Technology, 209(1), 360-366. doi:10.1016/j.jmatprotec.2008.02.007


This material may be protected under Copyright Act which governs the making of photocopies or reproductions of copyrighted materials.
You may use the digitized material for private study, scholarship, or research.

Back to previous page

Installed and configured by Bahagian Automasi, Perpustakaan Tuanku Bainun, Universiti Pendidikan Sultan Idris
If you have enquiries, kindly contact us at pustakasys@upsi.edu.my or 016-3630263. Office hours only.