HIGHLIGHTS
SUMMARY
As it does not partition strongly to the c¢, Nb additions usually have a limited effect on the c-c¢ lattice misfit.[22] Nb also increases the anti-phase boundary (APB) energy of the c¢, as well as acting as a solid solution strengthener in both the c matrix and c¢ precipitates.[22,23] Regarding elemental partitioning to the c-c¢-c¢¢ phases, Fe clearly partitions to the matrix c-phase, albeit with low levels found in both the c¢ and c¢¢ precipitate phases. A reduction of the overall Al content by 10 pct . . .
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