Parameter Design in Carbonitriding of EN36, 16MnCr5, and AISI 4140 Steels Using Principal Component-Based Grey Incidence (PGI)

Table 5

Analysis of variance on DPI values.

Factors	Sum of square	Degrees of freedom	Mean sum of square	F-ratio	% Contribution
A	0.0232	2	0.012	7.975	18.725
B	0.0383	2	0.019	13.184	30.953
C	0.0273	2	0.014	9.402	22.073
D	0.0219	2	0.011	7.532	17.684
Error	0.0131	9	0.001		10.565
Total	0.1238	17			100