Research Article
Synthesis and Characterization of Mechanical Properties of AA8014 + Si3N4/ ZrO2 Hybrid Composites by Stir Casting Process
Table 9
Analysis of Variance for microhardness test.
| Source | Df | Seq SS | Contribution (%) | Adj SS | Adj MS | F-value | P-value |
| Regression | 4 | 2156.94 | 24.11 | 2156.94 | 539.24 | 1.75 | 0.176 | % of reinforcement | 1 | 98.00 | 1.10 | 98.00 | 98.00 | 0.32 | 0.579 | Stir speed (rpm) | 1 | 364.50 | 4.07 | 364.50 | 364.50 | 1.18 | 0.289 | Stir time (min) | 1 | 696.89 | 7.79 | 696.89 | 696.89 | 2.26 | 0.147 | Molten temperature (oC) | 1 | 997.56 | 11.15 | 997.56 | 997.56 | 3.23 | 0.086 |
|
|
Microhardness (VHN) = 51.5 + 1.17% of reinforcement − 0.0450 Stir speed (rpm) + 1.244 Stir time (min) + 0.0744 Molten temperature (oC).
|