PSI - Issue 14

Puneeth N et al. / Procedia Structural Integrity 14 (2019) 53–59 Structural Integrity Procedia 00 (2018) 000 – 000

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Fig 4 Shows SEM photographs of B4 MMC Contains Al 6082 reinforced with 6 wt. % of Al 2 O 3 and 4 wt. % of Al 2 SiO 5

Fig 5 Shows SEM photographs of B7 MMC Contains Al 6082 reinforced with 9 wt. % of Al 2 O 3 and 4 wt. % of Al 2 SiO 5

4. Conclusion

In the present work, Hardness, Tensile, Impact and the Fracture toughness tests were conducted on Al6082 based Al 2 O 3 and Al 2 SiO 5 hybrid metal matrix composites fabricated via stir casting technique by involving ANOVA method by varying three different parameters wt. % of Al 2 O 3 , stir speed and stir time. Effects of these parameters on mechanical properties were analyzed. i) Composites were successfully obtained using stir casting technique. ii) Addition of reinforcement helped to improvise on the Mechanical properties of the hybrid composites when compared with the base alloy. iii) Maximum hardness value of Al6068- Al 2 O 3 / Al 2 SiO 3 hybrid composite material was obtained for 6 wt. % of Al 2 O 3 , 250 rpm stir speed and 15 min of stirring. iv) Tensile strength, hardness and impact energy of Al 6082 base alloy was found to be 108.7 N/mm 2 , 65 RHN and 4J respectively and that for Al 6082 reinforced with Al 2 O 3 and Al 2 SiO 3 hybrid composites was found to be 194.96N/mm2, 96 RHN and 27 J; with an increase in 44.2%, 32.29% and 85.18% respectively v) The maximum tensile strength of Al6082- Al 2 O 3 / Al 2 SiO 3 hybrid composite material was obtained for 6 wt. % of Al 2 O 3 , 250 rpm stir speed and 15 min of stirring. vi) The maximum impact strength of Al6082- Al 2 O 3 / Al 2 SiO 3 hybrid composite material can be obtained for 6 wt. % of Al 2 O 3 , 250 rpm stir speed and 10 min of stirring. vii) The maximum fracture toughness of Al6082- Al 2 O 3 / Al 2 SiO 3 hybrid composite material can be obtained for 6 wt. % of Al 2 O 3 , 4 wt. % of Al 2 SiO 5 with 200rpm stir speed and 15 min stir time.