Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Consolidation of powder prior to sintering
Reexamination Certificate
2005-06-07
2005-06-07
Jenkins, Daniel (Department: 1742)
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Consolidation of powder prior to sintering
C419S041000
Reexamination Certificate
active
06902699
ABSTRACT:
High strength aluminum alloy powders, extrusions, and forgings are provided in which the aluminum alloys exhibit high strength at atmospheric temperatures and maintain high strength and ductility at extremely low temperatures. The alloy is produced by blending about 89 atomic % to 99 atomic % aluminum, 1 atomic % to 11 atomic % of a secondary metal selected from the group consisting of magnesium, lithium, silicon, titanium, zirconium, and combinations thereof, and up to about 10 atomic % of a tertiary metal selected from the group consisting of Be, Ca, Sr, Ba, Ra, Sc, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, W, and combinations thereof. The alloy is produced by nanostructure material synthesis, such as cryomilling, in the absence of refractory dispersoids. The synthesized alloy is then canned, degassed, consolidated, extruded, and optionally forged into a solid metallic component. Grain size within the alloy is less than 0.5 μm, and alloys with grain size less than 0.1 μm may be produced.
REFERENCES:
patent: 3172546 (1965-03-01), Schreiner
patent: 3740210 (1973-06-01), Bomford et al.
patent: 3771729 (1973-11-01), Frable
patent: 3960607 (1976-06-01), Manzonelli et al.
patent: 4090874 (1978-05-01), Kaufman
patent: 4113472 (1978-09-01), Fister et al.
patent: 4129443 (1978-12-01), Kaufman
patent: 4239159 (1980-12-01), Johns
patent: 4647304 (1987-03-01), Petkovic-Luton et al.
patent: 4772342 (1988-09-01), Polmear
patent: 4818481 (1989-04-01), Luton et al.
patent: 4853179 (1989-08-01), Shiina
patent: 4992242 (1991-02-01), Faure
patent: 5565169 (1996-10-01), Webster
patent: 5728479 (1998-03-01), Childree et al.
patent: 5775603 (1998-07-01), Kohler et al.
patent: 5902943 (1999-05-01), Schaffer et al.
patent: 6027582 (2000-02-01), Shahani et al.
patent: 6248188 (2001-06-01), Smolej et al.
patent: 6315842 (2001-11-01), Shahani et al.
patent: 6402860 (2002-06-01), Hashikura et al.
patent: 6468468 (2002-10-01), Neubing et al.
Liao, X.Z. et al., Deformation mechanisms at different grain sizes in a cryogenically ball-milled A1 -Mg alloy, Ultrafine Grained Materials II (2002), 323-330, Photomicrographs, Diffraction Patterns, 16 Ref. Minerals, Metals and Materials Society/Aime, Warrendale, PA; Conference: Ultrafine Grained Materials II.
Aikin, B..J.M. et al, Improvements in cryomill processing. Advanced Particulate Materials & Processes 1997 (1997), 287-294, Graphs, 6 Ref. Metal Powder Industries Federation, Princeton, NJ: Conference: 5th International Conference on Advanced Particulate Materials & Proce.
Lee, Z. et al., Microstructural evolution of cryomilled nanocrystalline A1-Ti-Cu alloy, Ultrafine Grained Materials II (2002), 653-659, Diffraction Patters, Photomicrographs, Graphs, 10 Ref. Minerals, Metals and Materials Society/Aime, Warrendale, PA; Conference: Ultrafine Grained Materials II.
Choi, J.H. et al., Consolidation behavior of nanocrystalline A1 -Sat.%Ti alloys synthesized by cryogenic milling, Journal of Alloys and Compounds (Feb. 9, 2001) 315, (1-2), 178-186, Diffraction Patterns, Photomicrographs, Graphs, 22 Ref. ISSN: 0925-8388.
Fritzemeier Leslie G.
Matejczyk Daniel E.
Van Daam Thomas J.
LandOfFree
Method for preparing cryomilled aluminum alloys and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for preparing cryomilled aluminum alloys and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preparing cryomilled aluminum alloys and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3491361