Nickel-based superalloy and articles
First Claim
Patent Images
1. A composition of matter comprising:
- about 6.0 wt % aluminum;
about 6.5 wt % tantalum;
about 4.5 wt % chromium;
about 5.0 wt % tungsten;
about 2.5 wt % molybdenum;
about 4 wt % rhenium;
about 12 wt % cobalt;
from about 0.2 to about 0.6 wt % hafnium;
from about 0.01 to about 0.03 wt % carbon;
from about 0.002 to about 0.006 wt % boron; and
balance nickel and incidental impurities,wherein the composition exhibits a sustained peak low cycle fatigue life at 1800°
F./45 ksi of at least 4000 cycles.
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Abstract
A nickel-based superalloy composition includes from about 5 to about 7 wt % aluminum, from about 4 to about 8 wt % tantalum, from about 3 to about 8 wt % chromium, from about 3 to about 7 wt % tungsten, from 1 to about 5 wt % molybdenum, from 1.5 to about 5 wt % rhenium, from 5 to about 14 wt % cobalt, from about 0 to about 1 wt % hafnium, from about 0.01 to about 0.03 wt % carbon, from about 0.002 to about 0.006 wt % boron, and balance nickel and incidental impurities. The composition may exhibit a sustained peak low cycle fatigue life at 1800° F./45 ksi of at least about 4000 cycles. The nickel-based superalloy composition may be used in single-crystal or directionally solidified superalloy articles, such as a blade, nozzle, a shroud, a splash plate, and a combustor of a gas turbine engine.
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Citations
19 Claims
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1. A composition of matter comprising:
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about 6.0 wt % aluminum; about 6.5 wt % tantalum; about 4.5 wt % chromium; about 5.0 wt % tungsten; about 2.5 wt % molybdenum; about 4 wt % rhenium; about 12 wt % cobalt; from about 0.2 to about 0.6 wt % hafnium; from about 0.01 to about 0.03 wt % carbon; from about 0.002 to about 0.006 wt % boron; and balance nickel and incidental impurities, wherein the composition exhibits a sustained peak low cycle fatigue life at 1800°
F./45 ksi of at least 4000 cycles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A composition of matter comprising:
- about 6.4 wt % aluminum, about 5.5 wt % tantalum, about 6.0 wt % chromium, about 4.0 wt % tungsten, about 2.0 wt % molybdenum, about 4.0 wt % rhenium, about 7.5 wt % cobalt, from about 0.2 to about 0.6 wt % hafnium, from about 0.01 to about 0.03 wt % carbon, from about 0.002 to about 0.006 wt % boron, and balance nickel and incidental impurities, wherein the composition exhibits a sustained peak low cycle fatigue life at 1800°
F./45 ksi of at least 4000 cycles. - View Dependent Claims (11)
- about 6.4 wt % aluminum, about 5.5 wt % tantalum, about 6.0 wt % chromium, about 4.0 wt % tungsten, about 2.0 wt % molybdenum, about 4.0 wt % rhenium, about 7.5 wt % cobalt, from about 0.2 to about 0.6 wt % hafnium, from about 0.01 to about 0.03 wt % carbon, from about 0.002 to about 0.006 wt % boron, and balance nickel and incidental impurities, wherein the composition exhibits a sustained peak low cycle fatigue life at 1800°
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12. A composition of matter comprising:
- about 5.8 wt % aluminum, about 7.0 wt % tantalum, about 4.5 wt % chromium, about 6.0 wt % tungsten, about 2.5 wt % molybdenum, about 3.5 wt % rhenium, about 10.0 wt % cobalt, from about 0.2 to about 0.6 wt % hafnium, from about 0.01 to about 0.03 wt % carbon, from about 0.002 to about 0.006 wt % boron, and balance nickel and incidental impurities, wherein the composition exhibits a sustained peak low cycle fatigue life at 1800°
F./45 ksi of at least 4000 cycles. - View Dependent Claims (13)
- about 5.8 wt % aluminum, about 7.0 wt % tantalum, about 4.5 wt % chromium, about 6.0 wt % tungsten, about 2.5 wt % molybdenum, about 3.5 wt % rhenium, about 10.0 wt % cobalt, from about 0.2 to about 0.6 wt % hafnium, from about 0.01 to about 0.03 wt % carbon, from about 0.002 to about 0.006 wt % boron, and balance nickel and incidental impurities, wherein the composition exhibits a sustained peak low cycle fatigue life at 1800°
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14. An article comprising a composition comprising:
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about 6.0 wt % aluminum; about 6.5 wt % tantalum; about 4.5 wt % chromium; about 5.0 wt % tungsten; about 2.5 wt % molybdenum; about 4 wt % rhenium; about 12 wt % cobalt; from about 0.2 to about 0.6 wt % hafnium; from about 0.01 to about 0.03 wt % carbon; from about 0.002 to about 0.006 wt % boron; and balance nickel and incidental impurities, wherein the composition exhibits a sustained peak low cycle fatigue life at 1800°
F./45 ksi of at least 4000 cycles. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification
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Current AssigneeGeneral Electric Company
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Original AssigneeGeneral Electric Company
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InventorsKonitzer, Douglas Gerard, Miller, Joshua Leigh, Zhang, Wei-Jun
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Primary Examiner(s)Roe, Jessee
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Application NumberUS13/665,280Publication NumberTime in Patent Office713 DaysField of Search420/445US Class Current420/445CPC Class CodesC22C 19/057 with the maximum Cr content...C30B 11/00 Single-crystal growth by no...C30B 29/52 AlloysF01D 5/28 Selecting particular materi...F05C 2201/0466 Nickel
