Statistical Study of the Effects of the Composition on the Oxidation Resistance of Ni-Based Superalloys

Table 2

Results of regression analysis for mass gain after oxidation tests ( = 0.07235, -square = 87.5%, and -square (adjusted) = 70.7%).

Term	Coefficient	SE coefficient
Constant	1.09641	0.398121	2.754	0.011
Co	−0.00155	0.016121	−0.096	0.924
Cr	−0.03997	0.043708	−0.914	0.369
Mo	−0.02271	0.048362	−0.47	0.643
W	−0.04579	0.024181	−1.894	0.069
Al	−0.12666	0.053758	−2.356	0.026
Ti	0.02162	0.048362	0.447	0.659
Ta	−0.01862	0.024181	−0.77	0.448
CoCo	0.00048	0.00035	1.373	0.181
CrCr	0.0011	0.001608	0.687	0.498
MoMo	−0.00319	0.003151	−1.011	0.321
WW	−0.00024	0.000788	−0.307	0.761
AlAl	0.00677	0.003151	2.15	0.041
TiTi	0.00448	0.003151	1.422	0.167
TaTa	0.00083	0.000788	1.055	0.301
CoCr	−0.00002	0.000974	−0.021	0.983
CoMo	0.00024	0.001364	0.174	0.864
CoW	0.00079	0.000682	1.153	0.26
CoAl	−0.00037	0.001364	−0.271	0.789
CoTi	−0.00016	0.001364	−0.12	0.905
CoTa	−0.00156	0.000682	−2.293	0.03
CrMo	0.00168	0.002923	0.574	0.571
CrW	0.00451	0.001462	3.086	0.005
CrAl	−0.00141	0.002923	−0.482	0.634
CrTi	0.0027	0.002923	0.924	0.364
CrTa	−0.00125	0.001462	−0.858	0.399
MoW	0.00152	0.002046	0.741	0.465
MoAl	0.00558	0.004093	1.363	0.185
MoTi	0.00346	0.004093	0.845	0.406
MoTa	−0.00237	0.002046	−1.16	0.257
WAl	−0.0005	0.002046	−0.244	0.809
WTi	−0.00199	0.002046	−0.971	0.341
WTa	−0.00076	0.001023	−0.742	0.465
AlTi	−0.0071	0.004093	−1.734	0.095
AlTa	0.00575	0.002046	2.808	0.009
TiTa	0.00068	0.002046	0.331	0.743