Study of Microstructure and Properties of 316L with Selective Laser Melting Based on Multivariate Interaction Influence

Table 4

Analysis of variance of surface roughness.

Source	Sum of squares	DF	Mean square	F value	value prob > F
Model	1172.94	27	43.44	10.47	<0.0001
A	1.71	1	1.71	0.41	0.5263
B	1.153  10^−3	1	1.153  10^−3	2.778  10^−4	0.9868
C	2.044  10^−3	1	2.044  10^−3	4.927  10^−4	0.9825
D	119.63	1	119.63	28.83	<0.0001
E	4.67	1	4.67	1.13	0.2983
F	767.11	1	767.11	184.88	<0.0001
AB	1.02	1	1.02	0.24	0.6248
AC	17.07	1	17.07	4.11	0.0529
AD	0.13	1	0.13	0.031	0.8620
AE	0.11	1	0.11	0.027	0.8698
AF	0.19	1	0.19	0.045	0.8331
BC	2.00	1	2.00	0.48	0.4934
BD	0.53	1	0.53	0.13	0.7236
BE	3.59	1	3.59	0.86	0.3610
BF	0.49	1	0.49	0.12	0.7334
CD	7.34	1	7.34	1.77	0.1949
CE	0.84	1	0.84	0.20	0.6556
CF	1.12	1	1.12	0.27	0.6076
DE	0.22	1	0.22	0.052	0.8217
DF	91.57	1	91.57	22.07	<0.0001
EF	16.06	1	16.06	3.87	0.0599
Residual	107.88	26	4.15
Lack of fit	97.78	21	4.66	2.31	0.1801
Pure error	10.10	5	2.02
Cor total	1280.82	53