Issue 39

S. Doddamani et alii, Frattura ed Integrità Strutturale, 39 (2017) 274-281; DOI: 10.3221/IGF-ESIS.39.25 280 Sl.No Weight percentage Fracture Toughness (K IC ) MPa m 1/2 Al-SiC Al-Graphite 1 3% 6.61 13.92 2 6% 6.59 15.25 3 9% 5.63 15.85 4 12% 6.71 15.69 Table 2: Comparison of fracture toughness of Al-SiC [3] and Al-Gr. C ONCLUSIONS ased on the experimental study of Al6061-graphite MMCs the following conclusions are made. The experimental study of the fracture toughness of the Al6061-graphite was conducted in this work. From experimental results it was observed that, except 12% graphite, the fracture toughness of Al6061-graphite was observed to increase with an increase in weight percent of graphite. This increase in fracture toughness is the effect of percentage increment of graphite particulates which act as barricade to internal cracks in the microstructure. From the comparison it is found that the fracture toughness of the aluminium graphite is more compared to aluminium silicon carbide. Based on the conclusions made here, one can consider the Al6061-graphite particulate MMC for automobile applications such as: Bearing surfaces, cylinder liners, pistons, cam shafts, brake components, etc., and aerospace applications such as internal aerospace engine components, exhaust systems, wing and fuselage (main body) of aircraft structure. F UNDING his research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors. R EFERENCES [1] ASM International, ASM Handbook of Composites, 21 (2001). [2] Saheb, D. A., Aluminum silicon carbide and aluminum graphite particulate composites, ARPN Journal of Engineering and Applied Sciences, 6(10) (2011). [3] Alaneme, K.K., Aluko, A.O., Fracture toughness (K IC ) and tensile properties of as-cast and age-hardened aluminium (6063)–silicon carbide particulate composites, Scientia Iranica A, 19 (4) (2012) 992–996. [4] Alaneme, K.K., Fracture toughness (K IC ) Evaluation for dual phase medium carbon low alloy steels using Circumferential Notched Tensile (CNT) specimens, Materials Research, 14(2) (2011) 155-160. [5] Agboola, O. P., Sarioglu, F., Kızılors, C., Validation of Circumferential Notched Tensile (CNT) test procedure for K ISCC Determination, Proceedings of the World Congress on Engineering, London, U.K., III (2013). [6] Nath, S. K., Kr Das, U., Effect of microstructure and notches on the fracture toughness of medium carbon steel, Journal of Naval Architecture and Marine Engineering, (2006). [7] ASM International, ASM Handbook - Fatigue and fracture, 19 (1996). [8] Neelima Devi, C, Mahesh, V., Selvaraj, N., Mechanical characterization of Al/SiC composite, International Journal of Applied Engineering Research, Dindigul, 1 (4) (2011). [9] Anderson, T. L., Fracture mechanics-fundamentals and applications, 3 rd Edition, (2013). [10] European Aviation Safety Agency (EASA), The Airbus A380 wing cracks: an engineer’s perspective, http://www.theconversation.com . February 10, (2012). B T