US1620082A - Aluminum alloy containing lithium - Google Patents
Aluminum alloy containing lithium Download PDFInfo
- Publication number
- US1620082A US1620082A US679262A US67926223A US1620082A US 1620082 A US1620082 A US 1620082A US 679262 A US679262 A US 679262A US 67926223 A US67926223 A US 67926223A US 1620082 A US1620082 A US 1620082A
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- US
- United States
- Prior art keywords
- alloy
- aluminum
- lithium
- aluminum alloy
- containing lithium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
- Y10S411/914—Coated bolt
Definitions
- My invention relates to aluminum alloys containing lithium. ol' the type described in' application Scr. No. 302,404, filed June 28, 1920, by myself and George Welter. Al- 5 loys of this type are especially adapted for mechanical or constructional purposes, anteriorularly if they have been subjected to suitable heat treatment.
- the alloys areto have ahigh tensile strength as-well as ductility and great capacity for clongation,'zinc or tin should be added.
- Such an alloy especially suited for the manufacture of sheets comprises zinc, 8 to 12%, lithium, from more traces up to 0.5%, and the rest aluminum.
- the zinc can, in this alloy, be wholly or partly replaced by tin.
- high tensile strength may have advantageously the following composition: zinc, 1 to 12%; copper, up to 4%; lithium, from a trace up to 0.5%.
- the copper may be wholly or partly replaced by nickel, cobalt, manganesc, tin, chromium, or silver.
- These alloys may be made by melting in a crucible the pure aluminum. and then adding the copper and/or other metals, either separately or in the form of-previously made alloys. The crucible is then removed from the furnace and the lithium metal added, preferably by enclosing it in an aluminum jacket, and submerging it under the surface of the molten metal.
- Products such as rods, bars, wire, sheets, shapes of all kinds, rivets, etc., can be made from such. aluminum alloys b pressing, rolling, forging, drawing, orot er such opera! tions. These products can be 'greatly improved it after-they have been manufaccontaining 8% onmore of silicon. My al- Thus, an alloy of Application filed December 7, 1923. Serial No. 679,262.
- a heat-treatment which consists in heating them to a temperature above 100 C. and then permitting them to cool slowly or rapidly chilling them. It is not possible to specify a definite maximum temperature for this heating but it should not in general be above 500 C.) as it varies according to the composition of thealloy, and can read- 11y be determined by test for each particular alloyf So also, the characteristics of the product as to tensile strength or elongation can be varied according to' the manner of 5 cooling. Rapid chilling tends toproduce alloy products of higher tensile strength, while y slow cooling, alloy products capable of greater elongation and ductility are obtained. f
- the cooling or chilling may be carried out m an oil or water bath, in an air current,
- the temperature of the cooling medium may be varied according torequirement; an the heat-treatment may be repeated if necessary or desired.
- loy contains no silicon except perhaps that small amount which sometimes occurs as an impurity in commercially pure aluminum. My alloy is therefore substantially free 'from silicon.
- the .hereindescribed alloy consisting predominantly of aluminum and substantially free from silicon, and containing an appreciable amount of lithium in less pro: portion than one-half of orie per centum.
- the hereindescribed alloy consisting predominantly of aluminum, with a minor proportion of a metal having the properties 'hereinabove described of zinc and tin, and
- Articles of manufacture made from an aluminum alloy containing zinc, 1 to 12%, lithium in quantity varying; from a trace to one-half of one perccntum and the balance chiefly aluminum, which articles have been subjected to a heat-treatment comprising the ste 75 of heating to a temperature above 100 and then cooling them.
Description
Patented Mar. 8, 1927.
JOHANN CZOCHRALSKI, OF FRANKFORT-ON-THE-MAIN,
"* V ATENT GERMANY, ASSIGNOR, BY
MESNE ASSIGNMENTS. T ALLIEDPROCESS CORPORATION, OF NEW YORK, N. Y-, A
CORPORATION OF NEW YORK.
ALUMINUM ALLOY CONTAINING LITHIUM.
No Drawing.
My invention relates to aluminum alloys containing lithium. ol' the type described in' application Scr. No. 302,404, filed June 28, 1920, by myself and George Welter. Al- 5 loys of this type are especially adapted for mechanical or constructional purposes, partieularly if they have been subjected to suitable heat treatment.
I have discovered that the hardening of aluminum drydithimn can be produced by the addition of exceedingly small quantities of lithium, such as from mere'traccs up to one-hall of one per centum.
By adding other metals it is possible to further improve the qualities of the aluminum alloys containing lithium. The effects produced depend upon the metals used.
Thus, it the alloys areto have ahigh tensile strength as-well as ductility and great capacity for clongation,'zinc or tin should be added. Such an alloy, especially suited for the manufacture of sheets comprises zinc, 8 to 12%, lithium, from more traces up to 0.5%, and the rest aluminum.
The zinc can, in this alloy, be wholly or partly replaced by tin.
If the main desideratum is an alloy having a high tensile strength with less ductility and capacity for elongation, then other metals should he added. high tensile strength may have advantageously the following composition: zinc, 1 to 12%; copper, up to 4%; lithium, from a trace up to 0.5%.
In this alloy, the copper may be wholly or partly replaced by nickel, cobalt, manganesc, tin, chromium, or silver.
These alloys may be made by melting in a crucible the pure aluminum. and then adding the copper and/or other metals, either separately or in the form of-previously made alloys. The crucible is then removed from the furnace and the lithium metal added, preferably by enclosing it in an aluminum jacket, and submerging it under the surface of the molten metal.
Products such as rods, bars, wire, sheets, shapes of all kinds, rivets, etc., can be made from such. aluminum alloys b pressing, rolling, forging, drawing, orot er such opera! tions. These products can be 'greatly improved it after-they have been manufaccontaining 8% onmore of silicon. My al- Thus, an alloy of Application filed December 7, 1923. Serial No. 679,262.
tured, they are subsequently subjected to a heat-treatment which consists in heating them to a temperature above 100 C. and then permitting them to cool slowly or rapidly chilling them. It is not possible to specify a definite maximum temperature for this heating but it should not in general be above 500 C.) as it varies according to the composition of thealloy, and can read- 11y be determined by test for each particular alloyf So also, the characteristics of the product as to tensile strength or elongation can be varied according to' the manner of 5 cooling. Rapid chilling tends toproduce alloy products of higher tensile strength, while y slow cooling, alloy products capable of greater elongation and ductility are obtained. f
The cooling or chilling may be carried out m an oil or water bath, in an air current,
or in any other suitable medium. The temperature of the cooling medium ma be varied according torequirement; an the heat-treatment may be repeated if necessary or desired.
I am aware of the patent to Pacz, No. 1,387,900, patented Aug. 16, 1921, which describes an alloy of aluminum and silicon,
loy contains no silicon except perhaps that small amount which sometimes occurs as an impurity in commercially pure aluminum. My alloy is therefore substantially free 'from silicon.
Ielaim:
'1. The .hereindescribed alloy consisting predominantly of aluminum and substantially free from silicon, and containing an appreciable amount of lithium in less pro: portion than one-half of orie per centum.
2. The hereindescribed alloy consisting predominantly of aluminum, with a minor proportion of a metal having the properties 'hereinabove described of zinc and tin, and
containing an appreciable amountof lithium in less proportion than one-half of one per centum. 3. Aluminum alloys containing zinc, 1 to 12%; lithium in quantity varying from a trace to one-half .of one percentum and thebalance chiefly aluminum. 4. Alloys according to claim 3 containing up to 4% of additional alloying metal whose presence tends to increase the tensile strength of the alloy.
5. Alloy according to claim 3, containing up to 4% of copper.
6. Articles of manufacture made from an aluminum alloy containing zinc, 1 to 12%, lithium in quantity varying; from a trace to one-half of one perccntum and the balance chiefly aluminum, which articles have been subjected to a heat-treatment comprising the ste 75 of heating to a temperature above 100 and then cooling them.
7. Articles as claimed in claim (3 in which the alloy contains up to 4% of an additional alloying metal whose plcscncc tends to increase the tensile strength of the alloy.
8. Articles as claimed in claim 6 in which the alloy contains up to 4% of copper.
In testimony whereof, I aflix my sigma 20 ture.
J OHANN CZOCHRALSKI.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US679262A US1620082A (en) | 1923-12-07 | 1923-12-07 | Aluminum alloy containing lithium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US679262A US1620082A (en) | 1923-12-07 | 1923-12-07 | Aluminum alloy containing lithium |
Publications (1)
Publication Number | Publication Date |
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US1620082A true US1620082A (en) | 1927-03-08 |
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US679262A Expired - Lifetime US1620082A (en) | 1923-12-07 | 1923-12-07 | Aluminum alloy containing lithium |
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Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2509281A (en) * | 1948-01-17 | 1950-05-30 | Molybdenum Corp | Production of a ferrous composition and article therefor |
US4172181A (en) * | 1977-05-10 | 1979-10-23 | Furukawa Aluminum Co., Ltd. | Composite material for vacuum brazing |
US4409038A (en) * | 1980-07-31 | 1983-10-11 | Novamet Inc. | Method of producing Al-Li alloys with improved properties and product |
US4532106A (en) * | 1980-07-31 | 1985-07-30 | Inco Alloys International, Inc. | Mechanically alloyed dispersion strengthened aluminum-lithium alloy |
US4648913A (en) * | 1984-03-29 | 1987-03-10 | Aluminum Company Of America | Aluminum-lithium alloys and method |
US4795502A (en) * | 1986-11-04 | 1989-01-03 | Aluminum Company Of America | Aluminum-lithium alloy products and method of making the same |
US4806174A (en) * | 1984-03-29 | 1989-02-21 | Aluminum Company Of America | Aluminum-lithium alloys and method of making the same |
WO1989001531A1 (en) * | 1987-08-10 | 1989-02-23 | Martin Marietta Corporation | Ultra high strength weldable aluminum-lithium alloys |
US4816087A (en) * | 1985-10-31 | 1989-03-28 | Aluminum Company Of America | Process for producing duplex mode recrystallized high strength aluminum-lithium alloy products with high fracture toughness and method of making the same |
US4838988A (en) * | 1986-11-05 | 1989-06-13 | Pechiney | Process for obtaining crystals of intermetallic compounds, in particular isolated monocrystals, by cooling alloys in the molten state |
US4915747A (en) * | 1985-10-31 | 1990-04-10 | Aluminum Company Of America | Aluminum-lithium alloys and process therefor |
US4921548A (en) * | 1985-10-31 | 1990-05-01 | Aluminum Company Of America | Aluminum-lithium alloys and method of making same |
US5032359A (en) * | 1987-08-10 | 1991-07-16 | Martin Marietta Corporation | Ultra high strength weldable aluminum-lithium alloys |
US5085830A (en) * | 1989-03-24 | 1992-02-04 | Comalco Aluminum Limited | Process for making aluminum-lithium alloys of high toughness |
US5122339A (en) * | 1987-08-10 | 1992-06-16 | Martin Marietta Corporation | Aluminum-lithium welding alloys |
US20090142222A1 (en) * | 2007-12-04 | 2009-06-04 | Alcoa Inc. | Aluminum-copper-lithium alloys |
-
1923
- 1923-12-07 US US679262A patent/US1620082A/en not_active Expired - Lifetime
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2509281A (en) * | 1948-01-17 | 1950-05-30 | Molybdenum Corp | Production of a ferrous composition and article therefor |
US4172181A (en) * | 1977-05-10 | 1979-10-23 | Furukawa Aluminum Co., Ltd. | Composite material for vacuum brazing |
US4409038A (en) * | 1980-07-31 | 1983-10-11 | Novamet Inc. | Method of producing Al-Li alloys with improved properties and product |
US4532106A (en) * | 1980-07-31 | 1985-07-30 | Inco Alloys International, Inc. | Mechanically alloyed dispersion strengthened aluminum-lithium alloy |
US4648913A (en) * | 1984-03-29 | 1987-03-10 | Aluminum Company Of America | Aluminum-lithium alloys and method |
US4844750A (en) * | 1984-03-29 | 1989-07-04 | Aluminum Company Of America | Aluminum-lithium alloys |
US4806174A (en) * | 1984-03-29 | 1989-02-21 | Aluminum Company Of America | Aluminum-lithium alloys and method of making the same |
US4816087A (en) * | 1985-10-31 | 1989-03-28 | Aluminum Company Of America | Process for producing duplex mode recrystallized high strength aluminum-lithium alloy products with high fracture toughness and method of making the same |
US4915747A (en) * | 1985-10-31 | 1990-04-10 | Aluminum Company Of America | Aluminum-lithium alloys and process therefor |
US4921548A (en) * | 1985-10-31 | 1990-05-01 | Aluminum Company Of America | Aluminum-lithium alloys and method of making same |
US4795502A (en) * | 1986-11-04 | 1989-01-03 | Aluminum Company Of America | Aluminum-lithium alloy products and method of making the same |
US4838988A (en) * | 1986-11-05 | 1989-06-13 | Pechiney | Process for obtaining crystals of intermetallic compounds, in particular isolated monocrystals, by cooling alloys in the molten state |
WO1989001531A1 (en) * | 1987-08-10 | 1989-02-23 | Martin Marietta Corporation | Ultra high strength weldable aluminum-lithium alloys |
US5032359A (en) * | 1987-08-10 | 1991-07-16 | Martin Marietta Corporation | Ultra high strength weldable aluminum-lithium alloys |
US5122339A (en) * | 1987-08-10 | 1992-06-16 | Martin Marietta Corporation | Aluminum-lithium welding alloys |
US5085830A (en) * | 1989-03-24 | 1992-02-04 | Comalco Aluminum Limited | Process for making aluminum-lithium alloys of high toughness |
US20090142222A1 (en) * | 2007-12-04 | 2009-06-04 | Alcoa Inc. | Aluminum-copper-lithium alloys |
US8118950B2 (en) | 2007-12-04 | 2012-02-21 | Alcoa Inc. | Aluminum-copper-lithium alloys |
US9587294B2 (en) | 2007-12-04 | 2017-03-07 | Arconic Inc. | Aluminum-copper-lithium alloys |
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