Effect of Friction Coefficient in Friction Stir Welding of B4C Reinforced AA5083 Metal Matrix Composites and Use of Fuzzy Clustering Technique for Weld Strength Prediction

Table 3

ANOVA test results of UTS.

Particulars		Tool coating
		TiN	AlCrN	DLC
Sum of squares	Regression	79.32	21.96	52.35
	Residual	2.25	1.07	0.8173
Mean squares	Regression	8.81	2.44	5.82
	Residual	0.4496	0.2141	0.1635
Degrees of freedom	Regression	9	9	9
	Residual	5	5	5
F ratio		19.60	11.39	35.58
value		0.0022	0.0077	0.0005
value		97.24	93.35	98.46
Adjusted value		92.28	86.95	95.70
Remarks		Significant	Significant	Significant