To estimate the increase in Tensile strength of the aluminium alloy AA5083 when reinforced with silicon carbide nanoparticles and carbonized eggshell powder (ESP). The experimental samples of the reinforced aluminium alloy metal matrix composite were prepared by stir-casting method. A G-Power calculation of 80% was used to determine the number of samples per group to be 20. The twenty sample specimens of as cast aluminium alloy AA5083 were the control group, twenty sample specimens of aluminium alloy AA5083 reinforced with 10% carbonized eggshell powder and 2% & 4% nano silicon carbide made up the experimental groups. The ASTM E8-95 standard was followed for the tensile strength testing. The average tensile strength of as cast AA5083 was found to be 233.15 MPa. The mean tensile strength for AA5083+10%ESP+2%SiC novel metal matrix composite was found to be 252.70 MPa. The mean tensile strength for AA5083+10%ESP+4%SiC novel metal matrix composite was found to be 263.70 MPa. Within the limitations of this study, the metal matrix composite with 4% weight percent of nano silicon carbide microparticles and 10% weight percent of eggshell powder as filler materials had a 13% relative increase in tensile strength compared to the as cast AA5083.
This experimental study aims to relate the hardness strength of the as cast aluminium alloy AA5083 and the metal matrix composite AA5083 reinforced with eggshell powder and silicon carbide nanoparticles. Composites were produced in three groups using the stir-casting method. The as cast aluminium alloy AA5083 having 20 sample specimens were used as the control group. The aluminium alloy AA5083 metal matrix reinforced with 10% carbonized eggshell powder (ESP) and 2% & 4% silicon carbide nanoparticle each having 20 sample specimens were used as the two experimental groups. The ASTM E10-15 standard was followed for the brinell hardness testing specimen. The G-Power used for determining sample size is 80%. The as cast AA5083 shows a mean surface hardness of 57.06 BHN. The metal matrix composites AA5083+10%ESP+2%SiC and AA5083+10%ESP+4%SiC were measured with mean surface hardness of 73.35 BHN and 82.85 BHN respectively. Within the limits of the study and the results obtained from the t-test, the hardness of the AA5083+10%ESP+4%SiC metal matrix composite shows significant increase by 45% compared with the as cast aluminium alloy AA5083.
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