Table 2: The chemical compositions (at.%) on the different oxidation layers of specimens oxidized for 100 hours at 800°C. Observation number indicates the position assigned in the Figure 4.
Alloy Position Al Nb Fe Mo W Ti
Ti-22Al-27Nb
1 19.0 31.2 - - - 49.4
2 19.1 32.1 - - - 48.9
3 26.6 36.3 - - - 37.0
4 21.2 34.3 - - - 44.5
5 15.3 32.8 - - - 51.8
Ti-22Al-20Nb-2W
1 21.6 22.4 - - 3.7 51.9
3 21.5 29.6 - - 6.6 42.3
4 21.2 38.6 - - 7.7 32.6
5 19.9 31.9 - - 6.3 41.9
6 20.4 24.2 - - 4.4 51.0
7 15.5 26.0 - - 5.3 53.3
8 17.7 24.2 - - 4.2 54.0
Ti-25Al-14Nb-2Mo-1Fe
1 22.0 19.1 1.0 0.85 - 57.3
3 21.8 19.2 1.4 0.85 - 56.7
4 21.1 19.3 0.9 2.2 - 56.5
5 21.0 20.3 1.1 0.29 - 57.3
6 18.2 21.1 0.7 0 - 60.5
7 24.7 23.5 0.9 0 - 52.0
8 10.4 24.6 0.7 0 - 65.8