Process parameter-microstructure-mechanical property relations of SiCp-reinforced aluminum composites produced by powder-injection casting
Keywords:Aluminum Composites, SiCp Reinforcement, Powder – Injection Casting, and Mechanical Properties
AbstractAluminum composites are of interest for engineering applications such as electrical and especially automotive applications and their final physical and mechanical properties are usually determined by fabrication techniques. This research aimed to study effects of process parameters, which are i) argon gas flow rates at 5 and 10 l/min, and ii) casting temperatures at 620 and 680°C, on integrity of the SiCp-reinforced 356 aluminum composites fabricated by powder-injection casting using a modified flux injection degassing machine. The SiCp additions are 0, 10 and 15 wt.%. Microstructure - mechanical property relations were constructed based on the predetermined process parameters. Aluminum 356 alloy was melted at 700ºC and injected with pre-heat-treated SiCp at 590°C. The injection was carried out via the argon gas for 15 minutes at a rotational speed of 1000 rpm using the modified SiCp injection degassing machine prior to pouring into cylindrical permanent molds for microstructure and mechanical property investigation. Experimental results showed that hydrogen degassing at 5 l/min of argon gas flow rate helped to produce good distribution of SiCp within the aluminum matrix and to decrease porosity in aluminum composites. Casting temperature at 680ºC in the liquid state was found to be a key factor in improving density and hardness properties.
Hull, D. and Clyne, T.W. (1996). An Introduction to composite materials. Cambridge: University Press
Van Paisarn Doungjak na Ayutthaya, (2004). Mechanical Properties of Silicon Carbide - Aluminum Tetroxycarbide Nanofibers- Reinforced Aluminum Matrix Comp. Chiang Mai: University.
Hashim, J., Looney, L. Hashmi, M.S.J. (1999). Metal matrix composites production by stir casting method. J. Mater. Pro. Technol.:92-93.
Aigbodion, V. S. and Hassan, S. B. (2007). Effects of silicon carbide reinforcement on microstructure and properties of cast Al-Si-Fe / SiC particulate composite. J. Mater. Sci. Eng. :355-360.
Huashun, Y., Hongmei, C., Rendian, M. A. and Guanghui, M. (2006).Frabrication of AlN - TiC/Al composites by gas injection processing .Rare Met. 25 :6.
Amirkhanlou, S. and Niroumand, B. (2010). Synthesis and characterization of 356 - SiCp composites by stir casting and compocasting methods. Trans. Nonferrous. Met. Soc. China: s788-s793.
Maleki, A., Meratian, M., Niroumand, B. and Gupta, M. (2008). In-Situ aluminum matrix composite using a new activated powder injection method. Metall. Mater. Trans.39 : 3034-3039.
Peach-Canul, M. I., Ortega-Celaya, F. and Peach-Canul, M. A. (2006). Influence of SiO2 in SiCp on microstructure and impact strength of Al/SiCp composites fabricated by pressureless infiltration. Mech. Compos. Mater. 42 (3): 401-418.
Emamy, M., Razaghian, A., Lashgari, H. R. and Abbasi, R. (2008). The effect of Al- 5Ti- 1B on the microstructure, hardness and tensile properties of Al2O3 and SiC - containing metal – matrix composites. J. Mater. Sci. Eng.: 210-217.
Akhlaghi, F., Lajevardi, A. and Maghanaki, H.M. (2004). Effects of casting temperature on the microstructure and wear resistance of compocast A356 / SiCp composites : comparison between SS and SL route. J. Mater. Pro. Technol. :155- 156, 1874-1880
Mohamed, A. T. (2001). Practicalization of cast metal matrix composites (MMCCs). J. Mater. Design. 22: 431- 441.
Hashim, K. J. (2001). The production of cast metal matrix composite by a modified stir casting method. J. Tekhnologi. 35(A):9-20.
Aqida, S. N., Ghazali, M. I. and Hashim, J. (2004). Effects of porosity on mechanical properties of metal matrix composite:an overview. J. Tekhnologi. 40(A): 17-32.
Samuel, A.M., Gotmare, A. and Samuel, F.H. (1995). Effects of solidification rate and metal feedability on porosity and SiC/ Al2O3 particle distribution in an Al-Si-Mg (359) alloy. Comp. Sci. Technol. 53 :301- 315.
Ravi, K. R., Pillai, R. M., Amaranathan, K. R., Pai, B. C. and Chakraborty, M. (2008). Fluidity of aluminum alloys and composites : A review. J. Alloys. Compd. 456 :201-210.
How to Cite
Copyright (c) 2017 Journal of Metals, Materials and Minerals
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Authors who publish in this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.