International Journal of Manufacturing Engineering / 2014 / Article / Tab 5

Research Article

Optimization of Fusion Zone Grain Size, Hardness, and Ultimate Tensile Strength of Pulsed Current Microplasma Arc Welded AISI 304L Sheets Using Genetic Algorithm

Table 5

ANOVA table.

SourceDFSeq SSAdj SSAdj MS

Grain size
Regression14249.023249.02317.78736.100.000
 Linear465.20765.20716.30185.590.005
 Square491.44391.44322.86087.840.001
 Interaction692.37292.37215.39545.280.004
Residual error1646.63946.6392.9149
 Lack of fit109.7509.7500.97500.160.994
 Pure error636.88936.8896.1481
Total30295.661

Hardness
Regression14228.18228.1816.2995.670.001
 Linear461.1761.1715.2925.320.006
 Square483.6483.6420.9107.270.002
 Interaction683.3883.3813.8964.830.005
Residual error1646.0146.012.876
 Lack of fit1010.5810.581.0580.180.991
 Pure Error635.4335.435.905
Total30274.19

Ultimate tensile strength
Regression14676.218676.21848.30136.870.000
 Linear4205.667205.66751.41677.310.002
 Square4210.551210.55152.63797.480.001
 Interaction6260.000260.00043.33336.160.002
Residual error16112.524112.5247.0327
 Lack of fit101.6671.6670.16670.011.000
 Pure error6110.857110.85718.4762
Total30788.742

DF: degrees of freedom, SS: sum of squares, MS: mean squares, and : Fishers ratio.