SiCp are one of the most used types ofreinforcement to reinforce Aluminum (Al) alloy in order to produce compositematerials that have the desired properties. SiC enhances the tensile strength,hardness, density and wear resistance of Al alloy (Murty S. V.
S. N. et al.,2003; Iqbal A. A.; 2016). T. Ozben (2008) found that the increasein the ratio of SiCp in Al-SiCp composites enhance the tensile strength,hardness and density whereas the impact toughness decreased.
In addition, particlesclustering, particle cracking and weak matrix-reinforcement bonding are thefactors affecting the impact behavior of SiC (Ozden S. et al., 2007; Iqbal A.A.
; 2016). P. Zhang and L. Fuguo (2010) studied theimpact of reinforcement particles agglomeration on the flow behavior of SiCpreinforced AMMCs. They concluded that the particle agglomeration has greatereffects on the mechanical response of the matrix during the tensile deformationcompared to the elastic response. They also revealed that the agglomerationregion has higher number of fractured particles compared to the particle randomdistribution region (Zhang P.
, & Fuguo L., 2010; Iqbal A. A.; 2016). K.
L. Meena et al. (2013) have studiedthe impact of SiCp volume in the Al-SiCp composites. The study used 5%, 10%,15% and 20% by weight of SiC to investigate tensile strength, hardness, densityand impact strength. In addition the study found that all of these propertiesincrease with the increase in the weight percentage of SiCp. Furthermore, Srinivasa K. et al. (2014) fabricateAl LM6-SiCp composites using stir casting method.
They fabricated Al LM-6-SiCpwith varying composition of 0%, 5%, 10% and 15% by weight of SiC. Theyconcluded that as the ratio of SiC content increase the hardness of Al LM6-SiCpcomposite increases. However the wear resistance decreases gradually with theincrease of SiC content. Inaddition, N. S. Kalyankar et al.
(2016) did a study that was focusing on thechange in the mechanical properties of Al LM25-SiCp composites and fabricatedby stir casting method. Al LM25 matrix material was reinforced with 10%, 15%and 20% by weight of SiC. They found that wear resistance of the fabricatedcomposite increased with increasing SiC weight percentage and hardnessdecreased with SiC content. Also they concluded that the tensile strength,yield strength and percentage of elongation increased with the increase in theweight percentage of SiC. Different studies have been conducted tostudy and understand the fatigue and fracture behavior of Al-SiCp composites.
A. A. Iqbal et al. found in two separate studies on the hybrid AMMCs that theparticle-matrix interface is the place where the fatigue damage initiates. Theyalso concluded that the fatigue damage propagates by the particle fracture andinterface de-bonding (Iqbal A. A. et al.,2003; Iqbal A.
A. et al., 2004). G.G.
Hosamani et al. (2016) investigatedthe wear characteristics, microstructure and the mechanical properties of SiCreinforced AMMCs. They fabricated AMMCs with 0, 3, and 7 weight % of SiCcontent by stir casting process. They experimentally concluded that theaddition of SiC reinforcements in Al matrix increased wear resistance, tensilestrength and compressive strength. The maximum weight percentage of SiCreinforcement at which the fabricated AMMCs showed maximum wear resistance,tensile strength and compressive strength was 7%. They also found from themicrostructure analysis that clustering and non-homogeneous distribution of SiCparticles. They attributed this to the improper time given for contact betweenSiC particle and Al matrix and the poor wetting of SiC particle in molten Al.