Claims
- 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.degree. to 500.degree. C. and compacted.
- 6. A method as recited in claim 5, wherein said heating step comprises heating said container and contents to a temperature ranging from 325.degree. C. to 450.degree. C.
- 7. A consolidated metal article compacted from particles of an aluminum base alloy consisting essentially of the formula Al.sub.bal Fe.sub.a Si.sub.b V.sub.c, "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 said consolidated article being composed of an aluminum solid solution phase containing therein a substantially uniform distribution of dispersed, intermetallic phase precipitates, each said precipitates measuring less than about 100 nm. in any dimension thereof.
- 8. A consolidated metal article as recited in claim 7, wherein said article has the form of a sheet having a width of at least 0.5" and a thickness of at least 0.010".
- 9. A consolidated metal article as recited in claim 8, wherein said particles of aluminum-base alloy are compacted at a temperature of about 400.degree. to 550.degree. C. and each of the said dispersed intermetallic precipitates measures less than 100 nm. in any dimension thereof.
- 10. A consolidated metal article as recited in claim 7, wherein the volume fraction of said fine intermetallic precipitates ranges from about 16 to 45%.
- 11. A consolidated metal article as recited in claim 7, wherein said article is compacted by forging without substantial loss of its mechanical properties.
- 12. A consolidated metal article as recited in claim 7, wherein said article is compacted by extruding through a die into bulk shapes.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of U.S. Ser. No. 782,774, filed Oct. 2, 1985, abandoned for "Rapidly Solidified Aluminum based silicon containing alloys for elevated temperature applications."
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
782774 |
Oct 1985 |
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