Ductility microalloyed NiAl intermetallic compounds

Details Ductility microalloyed NiAl intermetallic compounds Ductility microalloyed NiAl intermetallic compounds

1991-03-04

1992-05-26

Dean, R.

Stock material or miscellaneous articles

All metal or with adjacent metals

Laterally noncoextensive components

420445, 420450, 420460, 148404, 416241R, 415200, C22C 109, C22C 1905

Patent

active

051166917

ABSTRACT:
A NiAl nickel aluminide alloyed with yttrium, optionally gallium, and an element selected from the group consisting of chromium, molybdenum and combinations thereof, having improved room temperature ductility and plastic strain. NiAl nickel aluminide intermetallics alloyed with no more than about 5 atomic percent of additional elements have significantly improved room temperature ductility over conventional unalloyed beta phase nickel aluminides or beta phase nickel aluminides alloyed with higher percentages of additional elements. The NiAl nickel aluminide comprises, in atomic percent, at least 50% nickel, about 0.01% to about 0.25% yttrium, about 0 to about 0.15% gallium, about 0.05% to about 4% of an element selected from the group consisting of chromium, molybdenum and combinations thereof, and balance from about 40% to about 49.85% aluminum and trace impurities.

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