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Research Article

Ageing Characteristics of Stir Cast AZ 61 Alloy with Minor Additions

Author(s): Amit Tiwari, Neeraj Kumar and M.K. Banerjee*

Volume 18, Issue 6, 2024

Published on: 25 July, 2023

Article ID: e090623217838 Pages: 16

DOI: 10.2174/1872212118666230609122741

Price: $65

Abstract

Background: Knowing that magnesium (Mg) alloys and its composites bear the potential of being used simultaneously for light structural as well as biomedical applications, it appears prudent to look for developing a novel Mg alloy; the concurrent demand is to monitor recent trend in development of functional Mg-alloy and its composite materials through extensive patent search. Review of recent patents in the related field makes it relevant to investigate this aspect.

Objective: The authors aim to study the evolution of structure and properties in stir cast of AZ- 61 alloy with minor additions of scandium, calcium and manganese. This paper reports the results of this investigation.

Methods: The castings are prepared by stirring the molten alloy at 600 rpm for 10 minutes, followed by pouring into a preheated metal mould. The solidified alloys are homogenized at 550°C for 12 hours. The homogenized alloys are then subjected to solutionising treatment at 500°C for 5 hours; subsequently, the alloys are quenched in iced water. The quenched alloys are subjected to ageing treatment at different temperatures between 100°C to 400°C at an interval of 100°C. Similar experiments are conducted with its statically cast counterparts. The structure and properties of all the samples have been characterized by optical and scanning electron microscopy, and XRD analysis; DSC heating run is conducted to study the kinetics of phase transformation. Mechanical behaviour of castings is studied with the aid of tensile testing and fractography. Moreover, tribological behaviour of alloys is assessed by wear testing with the help of pin on disc method.

Results: The results show that the stir cast alloy produces a homogeneous structure with significant improvement in properties. The precipitates of Mg17Al12, Al Mn, Mg Zn2, Al2 Ca and Mg2 Ca are formed due to the ageing of both stir cast and statically cast alloy. It is found that the diffusion of Al in magnesium controls the precipitation process. The tribological properties are found to be satisfactory for the stir cast alloy.

Conclusion: The modified AZ61 alloy with minor additives, achieves excellent structural homogeneity and mechanical properties after stir casting followed by quench ageing.

Graphical Abstract

[1]
G. Parande, M. Gupta, V. Manakari, and S.D.S. Kopparthy, "Development of co-magnesium based composite with enhanced mechanical, damping and ignition properties", Recent Pat. Eng., vol. 14, no. 3, pp. 348-356, 2020.
[http://dx.doi.org/10.2174/1872212113666190211142051]
[2]
H. Cao, M. Huang, C. Wang, S. Long, J. Zha, and G. You, "Influence of heat treatment on the machinability and corrosion behavior of AZ91 Mg alloy", J. Magnes. Alloy., vol. 6, no. 1, pp. 52-58, 2018.
[3]
V.E. Bazhenov, A.V. Li, A.A. Komissarov, A.V. Koltygin, S.A. Tavolzhanskii, V.A. Bautin, O.O. Voropaeva, A.M. Mukhametshina, and A.A. Tokar, "Microstructure and mechanical and corrosion properties of hot-extruded Mg–Zn–Ca–(Mn) biodegradable alloys", J. Magnes. Alloy., vol. 9, no. 4, pp. 1428-1442, 2021.
[http://dx.doi.org/10.1016/j.jma.2020.11.008]
[4]
Z. Shan, Y. Zhang, S.W. Bin, Z. Qiang, and F. Jianfeng, "Microstructural evolution and precipitate behavior of an AZ61 alloy plate processed with ECAP and electropulsing treatment", J. Mater. Res. Technol., vol. 19, pp. 382-390, 2022.
[5]
M.S. Kaiser, S. Datta, A. Roychowdhury, and M.K. Banerjee, "Effect of scandium on the microstructure and ageing behaviour of cast Al–6Mg alloy", Mater. Charact., vol. 59, no. 11, pp. 1661-1666, Nov 2008.
[http://dx.doi.org/10.1016/j.matchar.2008.03.006]
[6]
M.S. Kaiser, S. Datta, and A.M.K. Roychowdhury, "Age hardening behavior of wrought Al–Mg–Sc alloy", Mater. Manuf, vol. 23, no. 1, pp. 74-81, 2007.
[7]
S. Banerjee, S. Poria, G. Sutradhar, and Prasanta Sahoo, "Dry sliding tribological behavior of AZ31-WC nano-composites", J. Magnes. Alloy., vol. 7, no. 2, pp. 315-327, 2019.
[http://dx.doi.org/10.1016/j.jma.2018.11.005]
[8]
A. El-Morsy, and A. Farahat, "Microstructure variation and mechanical behavior of aged AZ61 wrought magnesium alloy", Life Sci. J., vol. 10, no. 3, pp. 568-574, 2013.
[9]
J. Song, J. She, and D. Chen, "Latest research advances on magnesium and magnesium alloys worldwide", J. Magnes. Alloy., vol. 8, no. 1, pp. 1-41, 2020.
[http://dx.doi.org/10.1016/j.jma.2020.02.003]
[10]
E. Karakulak, "A review: Past, present and future of grain refining of magnesium castings", J. Magnes. Alloy., vol. 7, no. 3, pp. 355-369, 2019.
[http://dx.doi.org/10.1016/j.jma.2019.05.001]
[11]
R. Zeng, Y. Chi, L. Cui, B. Zhang, X. Yang, Z. Fen, and S. Li, "Preparation method for micro-arc oxidation aluminum oxide composite coating of magnesium/magnesium alloy", CN Patent - 108315800-A, 2018.
[12]
J. Li, D. Mei, C. Ding, and Y. Xu, "Preparation method of superhydrophobic film on surface of magnesium alloy", Patent CN108930042 (A), 2018.
[13]
H. Liu, L. Cui, R. Zeng, and S. Li, "Multi-coating composite material taking magnesium/magnesium alloy as matrix and preparation method of multi-coating composite material", CN Patent 106835130 (A), 2017.
[14]
Y. Wang, Y. Wu, L. Guo, D. Jia, and Z. Yu, "Template-3D etching preparation method of magnesium metal surface micro-nano composite hierarchical hole material", CN Patent CN105483715 (A), 2016.
[15]
S. Dan, G. Wang, X. Zhuo, J. Jiang, A. Ma, and Q. Chao, "Li Yuhua Method for constructing super-hydrophobic corrosion-resistant conversion film on surface of magnesium-lithium alloy and magnesium-lithium alloy with super-hydrophobic corrosion resistance", CN Patent 110592569, 2019.
[16]
Y. Qingzhen, W. Dong, R.Y. Gu, and Z. Wang, " Junping, "Preparation method of semi-solid B4Cp/AZ61 composite material", CN Patent 101880787B, 2012.
[17]
I. Veeranjaneyulu, V.C. Das, and S. Karumuri, "Investigation of mechanical properties and microstructure of AZ31-SiC-graphite hybrid nanocomposites fabricated by bottom pouring-type stir casting machines", Adv. Mater. Sci. Eng., 2023.
[http://dx.doi.org/10.1155/2023/3402348]
[18]
M. Subramani, S-J. Huang, and K. Borodianskiy, "Effect of SiC nanoparticles on AZ31 Magnesium Alloy", Materials, vol. 15, no. 3, p. 1004, 2022.
[http://dx.doi.org/10.3390/ma15031004]
[19]
R. Venkatesh, K.C. Ramesh, S. Manivannan, M. Vivekanandan, and K.J. Phani, "Synthesis and experimental investigations of tribological and corrosion performance of AZ61 magnesium alloy hybrid composites", J. Nanomater., vol. 2022, p. 12, 2022.
[http://dx.doi.org/10.1155/2022/6012518]
[20]
S.J. Huang, M. Subramani, and A.N. Ali, "The effect of micro-sicp content on the tensile and fatigue behavior of AZ61 magnesium alloy matrix composites", Inter Metalcast, vol. 15, pp. 780-793, 2021.
[http://dx.doi.org/10.1007/s40962-020-00508-0]
[21]
H. Song-Jeng, S. Murugan, and C. Chao-Ching, "Effect of hybrid reinforcement on microstructure and mechanical properties of AZ61 magnesium alloy processed by stir casting method", Compos. Commun., vol. 25, p. 100772, 2021.
[http://dx.doi.org/10.1016/j.coco.2021.100772]
[22]
W. Liu, B. Jiang, and S. Luo, "Mechanical properties and failure behavior of AZ61 magnesium alloy at high temperatures", J. Mater. Sci., vol. 53, pp. 8536-8544, 2018.
[http://dx.doi.org/10.1007/s10853-018-2125-7]
[23]
S. Mohammad, M. Khurram, W. Cuie, and L. Yuncang, "Magnesium-based composites reinforced with graphene nanoplatelets as biodegradable implant materials", J. Alloys Compd., vol. 828, p. 154461, 2020.
[http://dx.doi.org/10.1016/j.jallcom.2020.154461]
[24]
A. Saberi, H.R. Bakhsheshi-Rad, E. Karamian, M. Kasiri-Asgarani, and H. Ghomi, "Magnesium-graphene nano-platelet composites: Corrosion behavior, mechanical and biological properties", J. Alloys Compd., vol. 821, no. d, p. 153379, 2020.
[http://dx.doi.org/10.1016/j.jallcom.2019.153379]

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