Fabrication and Characterization of Aluminum Matrix Composite (AMCs) Reinforced Graphite by Stir Casting Method for Automotive Application

Abstract:

The effects of graphite and magnesium (Mg) addition on mechanical properties and microstructure of aluminum matrix composites (AMCs) have been investigated in this work. Aluminum alloy (ADC-12) was combined with graphite and Mg produced by stir casting. The effect of addition of graphite into the matrix has been studied with variation 2, 4 and 6 wt-% for each composite. The addition of Mg as wetting agent was introduced wit 0.4, 0.6 and 0.8 wt-% to promote wettability between ADC-12 and graphite. All composites were characterized both microstructures analysis and mechanical properties include tensile strength and hardness. The higher reinforcement content, the higher porosity formed, due to the tendency of de-wetting as well as particles agglomeration. One of the main intermetallic phase present evenly in aluminum matrix is Mg₂Si. The addition of magnesium in the material that will form Mg₂Si primary phases which have a high hardness value of these composites.

• Periodical: Materials Science Forum (Volume 988)
• Pages: 17-22
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.988.17
• Online since: April 2020
• Authors: Suryana Suryana*, Indah Uswatun Hasanah, Muhammad Fikri Fadhillah, Yordan Valentino Putra
• Keywords: Aluminum Matrix Composite, Graphite Reinforcement, Stir Casting, Wetting Agent

References

[1] H. Sudjana, Foundry Technology for Vocational School, Directorate of Vocational High Scool Development, Jakarta, (2008).

[2] H. Purwanto, Suyitno and P.T. Iswanto, Effect of Mold Temperature on Squeeze Casting on Physical and Mechanical Properties of Recycled Aluminum (Al-6.4%Si-1.9%Fe) (2011), Information on https://www.researchgate.net/publication/277029823.

[3] Sulardjaka, D.B. Wibowo, Arijanto and E.F. Setiaji, The Effect of Pouring Temperature on the Stir Casting Process on Density and Porosity of Aluminum Reinforced Iron Composites, ROTASI 13(3) (2011) 19-21, Information on http://ejournal.undip.ac.id/index.php/rotasi.

[4] Z. Liu, G. Zu, H. Luo, Y. Liu and G. Yao, Influence of Mg Addition on Graphite Particle Distribution in the Al Alloy Matrix Composites, J. Mater. Sci. Technol. 26(3) (2010) 244-250.

DOI: 10.1016/s1005-0302(10)60041-2

[5] J. Hashim, L. Looney, M.S.J. Hashmi, Metal matrix composites: production by the stir casting method, J. Mater. Process. Technol. 92/93(1999) 1-7.

DOI: 10.1016/s0924-0136(99)00118-1

[6] V. Mohanavel, K. Rajan, S. Suresh Kumar, G. Vijayan, M.S. Vijayanand, Study on mechanical properties pf graphite particulates reinforced aluminum matrix composite fabricated by stir casting technique, Materials Today: Proceeding 5 (2018) 2945-2950.

DOI: 10.1016/j.matpr.2018.01.090

[7] Sadi, V. Malau, M.W. Wildan, Suyitno, Effect of Stir Casting Parameter Factors on Porosity of Al-SiC Composites, ROTOR 7(1) (2014) 1-7, Information on https://jurnal.unej.ac.id/index.php/RTR/article).