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Rapidly solidified aluminum based silicon containing, alloys for elevated temperature applications
| Details |
Inventors: Adam, Colin M.; Bye, Richard L.; Das, Santosh K.; Skinner, David J.;
Assignee: Allied-Signal Inc. (Morris Township, Morris County, NJ)
Primary Examiner: Dean; R.
Assistant Examiner:
Attorney, Agent or Firm: Buff; Ernest D., Fuchs; Gerhard H.
A rapidly solidified aluminum-base alloy consists essentially of the formula Al.sub.bal Fe.sub.a Si.sub.b V.sub.c, wherein "a" ranges from 3.0 to 7.1 atom percent, "b" ranges from 1.0 to 3.0 atom percent, "c" ranges from 0.25 to 1.25 atom percent and the balance is aluminum plus incidental impurities, with the provisos that (i) the ratio (Fe+V): Si ranges from about 2.33:1 to 3:33:1 and (ii) the ratio Fe:V ranges from 11.5:1 to 5:1. The alloy exhibits high strength, ductility and fracture toughness and is especially suited for use in high temperature structural applications such as gas turbine engines, missiles, airframes and landing wheels. |
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DETAILED DESCRIPTION We claim: 1.
A rapidly solidified aluminum-base alloy consisting essentially of the formula Al.
sub.
bal Fe.
sub.
a Si.
sub.
b V.
sub.
c, wherein "a" ranges from 3.
0 to 7.
1 at %, "b" ranges from 1.
0 to 3.
0 at %, "c" ranges from 0.
25 to 1.
25 at % and the balance is aluminum plus incidental impurities, with the provisos that (i) the ratio (Fe+V):Si ranges from about 2.
33:1 to 3.
33:1, and (ii) the ratio Fe:V ranges from 11.
5:1 to 5:1.
2.
A method for making a rapidly solidified aluminum-based alloy, comprising the steps of: (a) forming a melt of the alloy recited in claim 1; and (b) quenching the melt at a cooling rate of at least 10.
sup.
5 .
degree.
C.
/sec.
3.
A method for forming a consolidated metal alloy article wherein particles composed of an aluminum-base alloy consisting essentially of the formula Al.
sub.
bal Fe.
sub.
a Si.
sub.
b V.
sub.
c, wherein "a" ranges from 3.
0 to 7.
1 at %, "b" ranges from 1.
0 to 3.
0 at %, "c" ranges from 0.
25 to 1.
25 at % and the balance is aluminum plus incidental impurities, with the provisos that (i) the ratio (Fe+V):Si ranges from about 2.
33:1 to 3.
33:1, and (ii) the ratio Fe:V ranges from 11.
5:1 to 5:1 are heated in a vacuum to a temperature ranging from about 300.
degree.
to 500.
degree.
C.
and compacted.
4.
A method as recited in claim 3, wherein said heating step comprises heating said particles to a temperature ranging from 325.
degree.
to 450.
degree.
C.
5.
A method for forming a consolidated metal alloy article wherein: (a) particles composed of an aluminum-base alloy consisting essentially of the formula Al.
sub.
bal Fe.
sub.
a Si.
sub.
b V.
sub.
c, wherein "a" ranges from 3.
0 to 7.
1 at %, "b" ranges from 1.
0 to 3.
0 at %, "c" ranges from 0.
25 to 1.
25 at % and the balance is aluminum plus incidental impurities, with the provisos that (i) the ratio (Fe+V):Si ranges from about 2.
33:1 to 3.
33:1, and (ii) the ratio Fe:V ranges from 11.
5:1 to 5:1 are placed in a container, heated to a temperature ranging from about 300.
degree.
to 500.
degree.
C.
, evacuated and sealed under vacuum, and (b) said container and contents are heated to a temperature ranging from 300
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