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US4629505A
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Aluminum base alloy powder metallurgy process and product
Assignee: Alcoa Corp
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Filing: 1985-04-02
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Granted: 1986-12-16
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Expires: 2005-04-02
Abstract
Abstract A metallurgical method including cooling molten aluminum particles and consolidating resulting solidified particles into a multiparticle body, wherein the improvement comprises the provision of greater than 0.15% of a metal which diffuses in the aluminum solid state at a rate less than that of Mn. Aluminum containing greater than 0.15% of a metal which diffuses in the aluminum solid state at a rate less than that of Mn.
Inventors
- 👤 Henry G. Paris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:27
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/04; C22C1/0408; C22C1/0416
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
A metallurgical method including cooling molten aluminum particles and consolidating resulting solidified particles into a multi-particle body, wherein the improvement comprises provision in the particles of an elemental composition consisting essentally of 3-4.5 wt % Cu, 1.25-2.25 wt % Mg, up to 0.5 wt % Mn, and greater than 0.15% of a metal which diffuses in the aluminum solid state at a rate less than that of Mn, the body being based on an average particle size (APD) of about 15 micrometers, whereby, in 1.9×7.6 cm extrusions, toughness increases with increasing strength and toughness K r values above 100 MPa·m 1/2 at longitudinal yield strengths above 450 MPa may be achieved.
Claim 2
Dependent Claim
111 words
A metallurgical method including cooling molten aluminum particles and consolidating resulting solidified particles into a multi-particle body, wherein the improvement comprises provision in the particles of an elemental composition consisting essentally of 3-4.5 wt % Cu, 1.25-2.25 wt % Mg, up to 0.5 wt % Mn, and greater than 0.15% of a metal which diffuses in the aluminum solid state at a rate less than that of Mn, the body being based on an average particle size (APD) of about 15 micrometers, whereby, in 1.9×7.6 cm extrusions, toughness increases with increasing strength and toughness K r values above 100 MPa·m 1/2 at longitudinal yield strengths above 450 MPa may be achieved.
Claim 3
Dependent Claim
23 words
A method as claimed in claim 1, said metal being selected from the group consisting of Zr, Ti, Hf, W, Ta and V.
Claim 4
Dependent Claim
28 words
A method as claimed in claim 1, grain refining elements of diffusion rate of Mn or above being present about only to their solubility limit at room temperature.
Claim 5
Dependent Claim
14 words
A method as claimed in claim 2, the particles containing 0.2-1 wt % Zr.
Claim 6
Dependent Claim
18 words
A method as claimed in claim 4, the Zr content falling in the range 0.3-0.8 wt % Zr.
Claim 7
Dependent Claim
66 words
An aluminum base alloy powder of average particle size (APD) of about 15 micrometers, consisting essentially of aluminum, 3-4.5 wt % Cu, 1.25-2.25 wt % Mg, 0.3-0.8 wt % Zr and up to 0.5 wt % Mn, whereby, in 1.9×7.6 cm extrusions, toughness increases with increasing strength and toughness K r values above 100 MPa·m 1/2 at longitudinal yield strengths above 450 MPa may be achieved.
Claim 8
Dependent Claim
66 words
An aluminum base alloy powder of average particle size (APD) of about 15 micrometers, consisting essentially of aluminum, 3-4.5 wt % Cu, 1.25-2.25 wt % Mg, 0.3-0.8 wt % Zr and up to 0.5 wt % Mn, whereby, in 1.9×7.6 cm extrusions, toughness increases with increasing strength and toughness K r values above 100 MPa·m 1/2 at longitudinal yield strengths above 450 MPa may be achieved.
Claim 9
Dependent Claim
67 words
A consolidated aluminum alloy metal particle composition consisting essentially of aluminum, 3-4.5 wt % Cu, 1.25-2.25 wt % Mg, 0.3-0.8 wt % Zr and up to 0.5 wt % Mn, the average particle size (APD) being about 15 micrometers, the composition providing, in 1.9×7.6 cm extrusions, increasing toughness with increasing strength and toughness K r values above 100 MPa·m 1/2 at longitudinal yield strengths above 450 MPa.
Claim 10
Dependent Claim
67 words
A consolidated aluminum alloy metal particle composition consisting essentially of aluminum, 3-4.5 wt % Cu, 1.25-2.25 wt % Mg, 0.3-0.8 wt % Zr and up to 0.5 wt % Mn, the average particle size (APD) being about 15 micrometers, the composition providing, in 1.9×7.6 cm extrusions, increasing toughness with increasing strength and toughness K r values above 100 MPa·m 1/2 at longitudinal yield strengths above 450 MPa.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |