Table 11 Optimal parameters and validation result.

From: Optimization studies of stir casting parameters and mechanical properties of TiO2 reinforced Al 7075 composite using response surface methodology

Optimal parameters

Temperature

Speed

Time

779.3 °C

574.2 rpm

22.5 min

 

Predicted values

Experimental value

Deviation (%)

Compressive strength

495.1 MPa

487.7 MPa

1.49

Elastic modulus

97.1 GPa

99.8 GPa

2.78

Impact strength

5.3 kJ/m2

5.53 kJ/m2

4.34

Microhardness

119.3 HV

116.8 HV

2.10

Ultimate tensile strength

658.4 MPa

641.3 MPa

2.60

  1. Composite desirability = 0.94.
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