Table 5 Analysis of variance of surface roughness of PMEDM samples.

From: Effect of powder particle concentration, pulse duration, and pulse current on machined surface characterization produced via EDM of biocompatible WE-43Mg alloy

Source

DF

Adj SS

Adj MS

F-Value

P-Value

 

A: Ton (µs)

2

8.461

4.23

1.74

0.185

Not significant

B: I (A)

2

6.167

3.083

1.26

0.289

Not significant

C: Cp (g/l)

2

5.08

2.54

1.04

0.359

Not significant

B*A

4

48.449

12.112

4.97

0.002*

Significant

B*C

4

44.382

11.095

4.55

0.003*

Significant

A*C

4

52.177

13.044

5.35

0.001*

Significant

Error

62

151.142

2.438

  

-

Lack-of-Fit

8

41.635

5.204

2.57

0.019

-

Pure Error

54

109.507

2.028

  

Total

80

315.857

   
  1. * Significant at 95% confidence level.
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