Assertion: hafnium's alloy | /r/ObjectUse | used in engine
Facets:
value: for the f-15
type: TRANSITIVE-OBJECT
value: for f-16
type: TRANSITIVE-OBJECT
Source sentences:
text: Second-generation alloys contain 3%; these alloys were used in the engines for the F-15 and F-16, whereas the newer single-crystal third-generation alloys contain 6% of rhenium; they are used in the F-22 and F-35 engines.