Experimental study of fracture mechanics in the aluminum matrix composites containing Fifteen percent silicon carbide particles

Document Type : Persian


1 Assistant Porfessor, Rajai University

2 M.Sc. Student, Rajai University

3 Assistant Porfessor , Shiraz university


In this investigation ‚the fracture toughness of A356 containing15%SiC composite was studied. Al/SiC composites have been considered because of their mechanical and erosion properties .Low fracture toughness in Al/SiC as compared with Aluminium alloys is one of its disadvantage. In this study at first A356 alloy was melted in a smelting electrical furnace then poured into the mould. A356-15% SiC were composed by melting method and mixing continuously (in order not to precipitate SiC  to the bottom) in the presence of a nature gas. The melt was poured in a metallic mould, then specimens were cut from the products bars in order to calculate fracture toughness according to ASTM. Obtained results for different specimens compared together. In this study Crack Opening Displacement (COD) is used to determine fracture toughness rate. KIc was calculated in composites and compared with that of base alloy. As a result KIc in composite samples were decreased significantly, debris, cracks, gas cavity.                    


 [1] Cocen U., Onel k., Failure Criteria in Fibr Reinforced - Polymer Composites, journal Composite Science and Technology, Volume. 62, 2002, pp.275-283
 [2] Wang M.T, Song .H, Liu. Ch. M., Corrosionof Al/SiC Metal Matrix Composites, Journal Materials in technologe, Volume. 22,2006, pp.350-359
 [3] Subrata Kumar Ghosh, Partha Saha, Crack and wear behavior of SiC particulate reinforced aluminium based metal matrix composite fabricated by direct metal laser sintering Aproce, Journal of Materials and Design, Volume .32, 2011, pp.139 –145.
[4] Shabastari S.‚ Shahri F.‚ Influence of modification, solidification conditions and heat treatment on the microstructure and mechanical properties of A356 aluminum alloy, Journal of material Science, Volume. 39,2004, pp. 2023-2032.                    
[5] Agarwala V.‚ Satyana.K.G.‚  Gaewala. R.C Agaewala‚ Studies on the development of aluminium alloy Mild steel reinforced composite‚ Jjournal of material Science‚ 1999‚ pp.210-218.
[6] Kim Nelson. P., Victor C. Li., Kamada. T, Fracture Toughness of Microfibe Reinforced Cement Composites, Jorunal  of  material in civilEngineering , vol .17 ,  2002, pp. 391-400.
[7] Juan N. , A Review of Fracture Toughness, Pittsburg State  University, August 9, 2006.
 [8] Lord  J. , Fracture Toughness estMethodsfor MMC, MMC-Assess Thematic Network,  Volume .10 , 2007, pp.1-16.
[9] Hui Z., Zhong Z. ,Jing Li .,Yang  K., Temperature dependence of crack initiation fractureToughness of various nanoparticles  filled polyamide 66, Journal of Polymer, Vol 47, 2006, pp. 679-68.
[10] Vazquez Villar. M. , Romero-Romo, A. Altamira- Torres and Rocha-Rangel, Microstructureevolution and fracture toughness of Al2O3/Ti composites, Journal of Ceramic Processing Research,Vol. 9,2008, pp. 330-333.
[11] Department of Applied Mechanics‚ Overview of the Experimental Investigations of the Fracture Toughness in Composite, Budapest University of Technology‚ Budapest, Hungary, 2005.
[12] Rittle. D,  Rosakis  A.J, Dynamic fracture of beryllium-bearing bulk metalli glass systems, journal of Engineering Fracture Mechanics, vol .72, 2005, pp .1905-1910
[13] Arsenault R., Shi N., Dislocation Generation Due to Differences Between the coefficient of Thermal Expansion, Material science and Engineering, vol .81, 1986,pp.175-198.
[14] Naoki N., Kyosuke N., Enhancement of strength of Sic by heat-treatment in air ,Journal of ceramic processing,vol.10, 2009, pp.319-32.
]15[باغچه سرازاده. محمد، بهار وندی. حمیدرضا،تولید کامپوزیت زمینه  Al با فاز تقویت کننده  ZrO2توسط روش اختلاط مستقیم وبررسی ریزساختار آن، مجلهفنیمهندسیدانشگاهآزاداسلامیمشهد، دوره دوم، شماره اول، پاییز 1387صص 13-19.
[16] Valdez S, Campillo B, Perez R, Martinez L, Garcia A. Synthesis, microstructural characterization of Al–Mg alloy–SiC particle composite., Journal of Mater Lett, Volume.29, 2008, pp. 2623-2635.
[17] Labib.A, Liu.H  , F.H.samuel, mechanical properties and fractography of two Al-Si-10
vol.% SiC particle composite castings, Materials science and Engineering, Vol.160,1993, pp.81-90
 [18] Amirkhanlou S., Rezaei M., Niroumand B., Toroghinejad M., High-strength highly-uniform composites produced by compocasting and cold rolling processes, Materials and Design,
Vol.32, 2011, pp. 2085–2090
[19] Annual Book of ASTM Standard, Metals test Methoods and Analytical procedures‚ ASTM Pablications‚ Philadelphi, 1987‚pp.522-525.
[20] chavala.n,Metal matrix composite, 2006,
[21] Oveisi E., Akhlaghi F., Effect of Holding Timeand Temperature for HypereutecticAlloy on the Segregation of Primary  SI particles in producing a Functionally Graded Material, Journal Foundarymens Society‚2009‚ pp.50-56.