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

Table 6

Analysis of variance of tensile strength.

Source	Sum of squares	DF	Mean square	F value	value prob > F
Model	1.227  10^6	27	45454.48	14.31	<0.0001
A	30861.77	1	30861.77	9.72	0.0044
B	44371.38	1	44371.38	13.97	0.0009
C	8444.14	1	8444.14	2.66	0.1150
D	6.023  10^5	1	6.023  10^5	189.67	<0.0001
E	686.54	1	686.54	0.22	0.6458
F	50015.45	1	50015.45	15.75	0.0005
AB	0.16	1	0.16	4.947  10^−5	0.9944
AC	4936.40	1	4936.40	1.55	0.2236
AD	25955.86	1	25955.86	8.17	0.0083
AE	3.46	1	3.46	1.089  10^−3	0.9739
AF	5545.85	1	5545.85	1.75	0.1978
BC	2596.73	1	2596.73	0.82	0.3741
BD	22248.05	1	22248.05	7.01	0.0136
BE	5530.04	1	5530.04	1.74	0.1985
BF	7718.38	1	7718.38	2.43	0.1311
CD	577.70	1	577.70	0.18	0.6732
CE	686.80	1	686.80	0.22	0.6458
CF	594.23	1	594.23	0.19	0.6689
DE	2029.53	1	2029.53	0.64	0.4313
DF	113.57	1	113.57	0.036	0.8515
EF	11412.79	1	11412.79	3.59	0.0692
Residual	82562.08	26	3175.46
Lack of fit	77877.06	21	3708.43	3.96	0.0663
Pure error	4685.02	5	937.00
Cor total	1.310  10^6	53