Patent EP0170984A2 successfully refreshed from Google Patents.
Patent EP0738966A2 successfully refreshed from Google Patents.
Patent EP0158769A1 successfully refreshed from Google Patents.
EP0158769A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Low density aluminum alloys
Assignee: Honeywell International Inc
•
Filing: 1985-01-18
•
Granted: —
•
Expires: 2005-01-18
Abstract
Abstract The present invention provides a low density aluminum-base alloy, consisting essentially ofAt least one element selected from the group consisting of Cu, Si, Sc, Ti, V, Hf, Be, Cr, Mn, Fe, Co, Ni 0,5 - 5 wt % Al balanceThe alloy has a primary, cellular-dendritic, fine-grained, supersaturated aluminum alloy solid solution phase with intermetallic phases of the constituent elements uniformly dispersed therein. A consolidated article can be produced by compacting together particles composed of the aluminum alloy of the invention in a vacuum at elevated temperature. The compacted alloy is solutionized by heat treatment, quenched in a fluid bath, and optionally, stretched and aged. The microstructure of the consolidated article is composed of an aluminum solid solution containing a substantially uniform distribution of fine intermetallic precipitates.
Inventors
- 👤 David John Skinner
- 👤 Kenji Okazaki
- 👤 Colin Mclean Adam
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 22:28
CPC Classifications
C; C22; C22C; C22C21/00; C22C1/00; C22C1/04; C22C1/0408; C22C1/0416; C22C21/06; Y; Y10; Y10S; Y10S420/00; Y10S420/902
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
76 words
A low density aluminum-base alloy, consisting essentially of the formula Al bal Zr a Li b Mg c T d , wherein T is at least one element selected from the group consisting of Cu, Si, Sc, Ti, V, Hf, Be, Cr, Mn, Fe, Co and Ni, "a" ranges from about 0.25-2 wt%, "b" ranges from about 2.7-5 wt%, "c" ranges from about 0.5-8 wt %, "d" ranges from about 0.5-5% and the balance is aluminum.
Claim 2
Dependent Claim
76 words
A low density aluminum-base alloy, consisting essentially of the formula Al bal Zr a Li b Mg c T d , wherein T is at least one element selected from the group consisting of Cu, Si, Sc, Ti, V, Hf, Be, Cr, Mn, Fe, Co and Ni, "a" ranges from about 0.25-2 wt%, "b" ranges from about 2.7-5 wt%, "c" ranges from about 0.5-8 wt %, "d" ranges from about 0.5-5% and the balance is aluminum.
Claim 3
Dependent Claim
45 words
An alloy as recited in claim 1, wherein said alloy is composed of a primary, cellular-dendritic, fine-grain, supersaturated aluminum alloy solid solution phase with filamentary intermetallic phases of the constituent elements dispersed therein, said intermetallic phases having width dimensions of not more than about 100nm.
Claim 4
Dependent Claim
19 words
An alloy as recited in claim 1, wherein "T" consists of Cu and "d" ranges from about 1.5-3 wt%.
Claim 5
Dependent Claim
14 words
An alloy as recited in claim 1, wherein "b" ranges from about 3-4.5 wt%.
Claim 6
Dependent Claim
14 words
An alloy as recited in claim 3, wherein "b" ranges from about 3-4.5 wt%.
Claim 7
Dependent Claim
15 words
An alloy as recited in claim 1, wherein "c" ranges from about 0.5-6 wt %.
Claim 8
Independent Claim
203 words
A method for producing a low-density, aluminum alloy, consolidated articles, comprising the steps of: compacting particles composed of a low density aluminum-base alloy, consisting essentially of the formula Al bal Zr a Li b Mg c T d , wherein T is at least one element selected from the group consisting of Cu, Si, Sc, Ti, V, Hf, Be, Cr, Mn, Fe, Co and Ni, "a" ranges from about 0.25-2 wt%, "b" ranges from about 2.7-5 wt%, "c" ranges from about 0.5-8 wt %, "d" ranges from about 0.5-5% and the balance is aluminum, said alloy having a primary, cellular dendritic, fine-grain, supersaturated aluminum alloy solid solution phase with filamentary, intermetallic phases of the constituent elements dispersed therein, and said intermetallic phases having width dimensions of not more than about 10C nm; heating said alloy during said compacting step to a temperature of not more than about 400°C to minimize coarsening of said intermetallic phases; solutionizing said compacted alloy by heat treatment at a temperature ranging from about 500 to 550°C for a period of approximately 0.5 to 5 hrs to convert elements from micro-segregated and precipitated phases into said aluminum solid solution phase; and quenching said compacted alloy in a fluid bath.
Claim 9
Independent Claim
203 words
A method for producing a low-density, aluminum alloy, consolidated articles, comprising the steps of: compacting particles composed of a low density aluminum-base alloy, consisting essentially of the formula Al bal Zr a Li b Mg c T d , wherein T is at least one element selected from the group consisting of Cu, Si, Sc, Ti, V, Hf, Be, Cr, Mn, Fe, Co and Ni, "a" ranges from about 0.25-2 wt%, "b" ranges from about 2.7-5 wt%, "c" ranges from about 0.5-8 wt %, "d" ranges from about 0.5-5% and the balance is aluminum, said alloy having a primary, cellular dendritic, fine-grain, supersaturated aluminum alloy solid solution phase with filamentary, intermetallic phases of the constituent elements dispersed therein, and said intermetallic phases having width dimensions of not more than about 10C nm; heating said alloy during said compacting step to a temperature of not more than about 400°C to minimize coarsening of said intermetallic phases; solutionizing said compacted alloy by heat treatment at a temperature ranging from about 500 to 550°C for a period of approximately 0.5 to 5 hrs to convert elements from micro-segregated and precipitated phases into said aluminum solid solution phase; and quenching said compacted alloy in a fluid bath.
Claim 10
Dependent Claim
31 words
A method as recited in claim 6, further comprising the step of ageing said compacted alloy at a temperature ranging from about 100-250°C for a period ranging from about 1-40 hr.
Claim 11
Dependent Claim
27 words
A method as recited in claim 6 further comprising the step of stretching said compacted alloy to enhance the number of potential dislocation sites within said alloy.
Claim 12
Dependent Claim
117 words
A consolidated article composed of an alloy consisting essentially of the formula Al bal Zr a Li b Mg c T d , wherein T is at least one element selected from the group consisting of Cu, Si, Sc, Ti, V, Hf, Be, Cr, Mn, Fe, Co and Ni, "a" ranges from about 0.25-2 wt%, "b" ranges from about 2.7-5 wt%, "c" ranges from about 0.5-8 wt %, "d" ranges from about 0.5-5 wt% and the balance is aluminum, said alloy having a microstructure composed of an aluminum solid solution phase containing therein a substantially uniform dispersion of fine intermetallic precipitates, and said precipitates measuring not more than about 20 nm along the largest linear dimension thereof.
Claim 13
Dependent Claim
117 words
A consolidated article composed of an alloy consisting essentially of the formula Al bal Zr a Li b Mg c T d , wherein T is at least one element selected from the group consisting of Cu, Si, Sc, Ti, V, Hf, Be, Cr, Mn, Fe, Co and Ni, "a" ranges from about 0.25-2 wt%, "b" ranges from about 2.7-5 wt%, "c" ranges from about 0.5-8 wt %, "d" ranges from about 0.5-5 wt% and the balance is aluminum, said alloy having a microstructure composed of an aluminum solid solution phase containing therein a substantially uniform dispersion of fine intermetallic precipitates, and said precipitates measuring not more than about 20 nm along the largest linear dimension thereof.
Claim 14
Dependent Claim
23 words
A consolidated article as recited in claim 10, wherein said alloy group T consists of Cu and "d" ranges from about 1.5-3 wt%.
Claim 15
Dependent Claim
15 words
A consolidated article as recited in claim 10, wherein "b" ranges from about 3-4.5 wt%.
Claim 16
Dependent Claim
15 words
A consolidated article as recited in claim 11, wherein "b" ranges from about 3-4.5 wt%.
Claim 17
Dependent Claim
49 words
A consolidated article as recited in claim 10 having a density of not more than 2.6 gm/cc, an ultimate tensile strength of at least about 450 x 10 3 KPa and an ultimate strain at fracture of at least about 5% elongation, measured at a temperature of about 20°C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.