60 Table 3.1 Alloy Compositions RSR 197 RSR 209 RSR 185 //17 at% wt% at% wt% at% wt% at7o wtT, Ni 76.0 73.9 74.0 72.6 73.8 72.6 77.0 A1 13.0 5.8 15.0 6.8 15.0 6.7 14.0 Mo 9.0 14.3 9.0 14.4 9.0 14.4 9.0 Ta 2.0 6.0 W 2.0 6.1 2.0 6.0 Y .015 LO I1 o C .2 --