Effect of Solution Treatment Temperature on Microstructure and Mechanical Properties of A356 Alloy

M. Ishak(1*), A. Amir(2), A. H. Ahmad(3)

(1) Faculty of Mechanical Engineering in Universiti Malaysia Pahang (UMP), Malaysia
(2) Ye Chiu Metal Smelting Sdn Bhd, Malaysia
(3) School of Mechanical and Manufacturing Engineering, Dublin City University (DCU), Ireland
(*) Corresponding author


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Abstract


Over the years, aluminum content in a vehicle part is increasing due to the needs to reduce weight as well as increase fuel efficiency. Most of the cast product in a vehicle part is mostly cast from A356 alloy. It is used because A356 alloy posses’ excellent characteristics over other type of alloy such as cas ability, high strength to weight ratio, good corrosion resistance and good weldability. Most of the cast component in vehicle such as cylinder head favors hardness over tensile strength. Most of the solution treatments studied was done on sample having α-Al with dendritic structure. The objective of this research is to investigate the effect of solution treatment temperature on microstructure and mechanical properties of A356 (Al7Si0.3Mg) aluminum alloy. Heat treatment was done to harness the full potential of cast A356 alloy and T6 heat treatment is the commonly used treatment for this alloy. In the present study, the specimen was cast using low pouring temperature method which produces equiaxed α-Al structure. The specimen undergone solution treatment for two (2) hours at three different temperatures (530 °C, 540 °C, and 550 °C), quenched in water at room temperature, followed artificial aged for six (6) hours at 170 °C. Mechanical properties of A356 aluminum alloy were investigated by tensile test and hardness test. The relation between size, shape, and distribution of Si particle and the alloy’s mechanical properties were investigated. Si particle size, shape, and dispersion affect the mechanical properties of cast A356 alloy. Higher solution treatment temperature produce smaller and more globular Si particle before completing T6 heat treatment. Elongations decrease while ultimate tensile strength (UTS) increase as solution temperature increased from 530 °C to 550 °C. A356 aluminum alloy specimen solution treated at 530 °C have comparable hardness compared with specimen solution treatment at 540 °C before and after artificial ageing - complete T6 heat treatment - with higher elongation and lower energy usage as added benefit
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Keywords


Solution Treatment Temperature; Equiaxed Α-Al; Hardness; A356 Aluminum Alloy

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References


Campbell, J. 2003. Castings Third Edition, Butterworth-Heinemann, London.

Wisam M. Abu Jadayil, Experimental Investigation of Solidification Time Effects on Surface and Subsurface Aluminum Casting Defects, May 2011 Vol. 5 N. 4 pp. 569-576

Sjölander, E. & Seifeddine, S. 2010. The heat treatment of Al–Si–Cu–Mg casting alloys. Journal of Materials Processing Technology 210, 1249-1259.

Möller, H., Govender, G. & Stumpf, W. E. 2008. The T6 Heat Treatment of Semi-Solid Metal Processed Alloy A356. The Open Materials Science Journal, 2, 6-10.

Cavaliere, P., Cerri, E., & Leo, P. 2004. Effect of heat treatments on mechanical properties and fracture behavior of a thixocast A356 aluminum alloy. Journal of Materials Science, 39: 1653-1658.

Shabestari, S. G. & Shahri, F. 2004. Influence of Modification, Solidification Conditions and Heat Treatment on the Microstructure and Mechanical Properties of A356 Aluminum Alloy. Journal of Materials Science, 39, 2023-2032.

Davidson, C. J., Griffiths, J. R. & Machin, A. S. 2002. The effect of solution heat-treatment time on the fatigue properties of an Al-Si-Mg casting alloy. Engineering Material Structure, 46, 223-230

Möller, H., Govender, G., & Stumpf, W. E. 2008. The T6 Heat Treatment of Semi-Solid Metal Processed Alloy A356. The Open Materials Science Journal, 2: 6-10

Sjölander, E. & Seifeddine, S. 2008. Optimisation of solution treatment of cast Al–Si–Cu alloys. The Open Materials Science Journal, 2, 6-10

Caceres, C. H., Davidson, C. J., Griffiths, J. R., & Wang, Q. C. 1999. The effect of Mg on the microstructure and mechanical behavior of Al-Si-Mg casting alloys. Metallurgical and Material Transaction A, 30: 2611-2618.

Kuntongkum, S., Wisutmethangoon, S., Plookphol, T. & Wannasin, J. 2008. Influence of Heat Treatment Processing Parameters on the Hardness and the Microstructure of Semi-Solid Aluminum Alloy A356. Journal of Metals, Materials and Minerals, 18, 93-97.

Sjölander, E. & Seifeddine, S. 2011. Artificial ageing of Al-Si-Cu-Mg casting alloys. Materials Science and Engineering A, 528, 7402-7409.

Ran, G., Zhou, J. E. & Wang, Q. G. 2008. Precipitates and tensile fracture mechanism in a sand cast A356 aluminum alloy. Journal of Materials Processing Technology 207, 46-52.

Goulart, P. R., Spinelli, J. E., Os´Orio, W. R. & A.Garcia 2006. Mechanical properties as a function of microstructure and solidification thermal variables of Al–Si castings. Materials Science and Engineering A 421, 245-253.


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