EP0208631A1 - Aluminiumlegierungen mit hohem Lithium- und Siliziumgehalt und Verfahren zu ihrer Herstellung - Google Patents

Aluminiumlegierungen mit hohem Lithium- und Siliziumgehalt und Verfahren zu ihrer Herstellung Download PDF

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Publication number
EP0208631A1
EP0208631A1 EP86420166A EP86420166A EP0208631A1 EP 0208631 A1 EP0208631 A1 EP 0208631A1 EP 86420166 A EP86420166 A EP 86420166A EP 86420166 A EP86420166 A EP 86420166A EP 0208631 A1 EP0208631 A1 EP 0208631A1
Authority
EP
European Patent Office
Prior art keywords
phase
alloy
hot
alloys
solidification
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.)
Granted
Application number
EP86420166A
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English (en)
French (fr)
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EP0208631B1 (de
Inventor
Bruno Dubost
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cegedur Societe de Transformation de lAluminium Pechiney SA
Original Assignee
Cegedur Societe de Transformation de lAluminium Pechiney SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cegedur Societe de Transformation de lAluminium Pechiney SA filed Critical Cegedur Societe de Transformation de lAluminium Pechiney SA
Priority to AT86420166T priority Critical patent/ATE45189T1/de
Publication of EP0208631A1 publication Critical patent/EP0208631A1/de
Application granted granted Critical
Publication of EP0208631B1 publication Critical patent/EP0208631B1/de
Expired legal-status Critical Current

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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
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C22C21/04—Modified aluminium-silicon alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0408—Light metal alloys
    • C22C1/0416—Aluminium-based alloys
    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting

Definitions

  • the field of the invention relates to alloys based on Al on high Li and Si contents and having an average to high mechanical strength, a very low density and a high Young modulus; a process for obtaining it uses rapid solidification (atomization, hyper quenching on a metal substrate, etc.) densification and hot shaping.
  • metallurgists have proposed additions of a few% of hardening elements such as Cu, Mg, Zn and other minor elements controlling the recrystallization or the grain size of the alloy, such as Mn, Cr, Ti, etc ...
  • These alloys also contain very low Fe and Si contents (less than 0.1% by weight).
  • the Applicant has found that it is possible to obtain sane specific modulus much greater than 25% on Al-Li-Si alloys containing large amounts of Si and Li, while retaining acceptable mechanical characteristics, resistance satisfactory spontaneous corrosion, and good formability.
  • This objective is achieved by the choice of a specific composition, the use of rapid solidification and techniques of powder metallurgy, and finally a shaping at controlled temperature.
  • the alloys according to the invention contain (% by weight): the total amount of these optional secondary elements being less than 5%, Al and impurities remain (each ⁇ 0.05%, total ⁇ 0.15%.
  • the Li content is preferably linked to the Si content by the following formula: with and preferably
  • the Li content is preferably kept between 4 and 7%
  • the total content of secondary elements is preferably kept below 2X.
  • the properties of the products obtained are only satisfactory if the alloys sc..t produced by rapid solidification at cooling rates from the liquid state greater than 1000 ° C / sec. by any known means (solidification on a wheel, atomization, etc.) This operation preferably takes place under an inert atmosphere, for example argon or helium.
  • the alloys thus obtained are then consolidated by the known techniques of powder metallurgy, for example according to the range: possible grinding, cold compaction, degassing under possible vacuum, hot compression and drawing by spinning, forging, stamping or any other technique. , with a wrought rate (initial cross-section / final cross-section) generally greater than 8.
  • the product temperature must remain below 400 ° C, and preferably 350 ° C, to obtain acceptable mechanical characteristics.
  • the products are generally used, as indicated, in the raw state of hot transformation, or after a slight additional deformation at a lower temperature, which makes it possible to improve both the flatness, the straightness or the dimensional tolerances and the mechanical resistance characteristics.
  • the products thus obtained have a large volume fraction, between 15 and 60%, preferably between 20 and 50%, of particles essentially consisting of a phase of cubic structure, with a parameter close to 0 , 59 at 0.60 nm, identified as phase T -Al 2 Li 3 Si 2 or Al Li Si, according to the authors.
  • This phase distributed homogeneously, has a size of between 0.01 and 10 ⁇ m, more generally between 0.01 and 5 ⁇ m: it is believed that this phase contributes to cold hardening and to the average temperatures of the alloy, its fine and homogeneous precipitation being accentuated by an income between room temperature and 350 ° C, preferably between 150 and 250 ° C.
  • the microstructure may optionally include a very fine globular precipitation of phase ⁇ '(Al 3 Li) whose diameter is less than 50 nm and also a slight precipitation of free Si or of phase 6 Al Li.
  • phase representatives are less than 10% (by volume).
  • the products thus obtained are characterized by an extremely fine grain whose size is less than 20 ⁇ m, and generally less than 10 ⁇ m.
  • the Applicant has on the other hand, found that, for an equal composition, the hardness of the products is higher the smaller the size of the phase T particles (Al, Li, Si); in particular the very rapid solidification of the thin ribbons (20 to 30 ⁇ m thick) on a metallic substrate ("melt spinning") leads, on the substrate side, to T-phase particle sizes of 0.01 to 0.5 ⁇ m.
  • microhardness is then greater than about 40% than that obtained on the outer face of the thicker ribbons or on powders obtained by atomization, for which the size of phase T particles is of the order of 0.5 to 5 ⁇ m.
  • Alloys the composition of which is given in Table 1, were obtained in the form of powder, by centrifugal spraying with helium, the latter being sieved to 200 ⁇ m maximum.
  • These powders were made from cast ingots, made with a pure base having an Fe content ⁇ 0.05%.
  • the outlet temperature being approximately 330 ° C.
  • the bars obtained were air-cooled, and characterized by density measurement, Young's modulus, tensile tests (long sense) and micrographic examinations.
  • Table I brings together the targeted chemical compositions determined by atomic absorption and the results obtained (average of 5 tests).
  • the oxygen content is around 0.5%.
  • phase T present was coarse (average size 2 ⁇ m, maximum size 5 ⁇ m), but homogeneously dispersed except for a few large particles of phase T (100 to 200 ⁇ m) whose presence explains the low elongations observed (primers premature rupture).
  • phase T coarse (average size 2 ⁇ m, maximum size 5 ⁇ m), but homogeneously dispersed except for a few large particles of phase T (100 to 200 ⁇ m) whose presence explains the low elongations observed (primers premature rupture).
  • Alloys Al, Li, Si including the compositions given in Example 1 were cast in strips of 10 mm x 40 ⁇ m approximately, of cross section, on a copper wheel 0 480 mm rotating at 1000 rpm, since 730 to 830 ° C they were characterized by Vickers microhardness under 10 g micrographic examination by optical microscopy, electron and X-ray diffraction in the raw casting state, and after heat treatment of tempering from 1 to 10 h between 200 and 350 ° C, to assess the hot stability and the structural evolution.
  • the external part of the ribbons B, C, D and the entire thickness of the ribbons (E, F) had a coarse structure of the order of 1 ⁇ m on average (maximum size of 4 ⁇ m) in the raw state of casting and after income.
  • the volume fraction of the precipitates did not vary significantly during the incomes.
  • the hardness increases with the contents of Li and Si, and the volume fraction of phase T, at least as long as it remains in the form of fine particles.
  • the fine structures give the alloys according to the invention a very high level of hardness after tempering at 200 ° C, and this remains high even after tempering at 350 ° C, unlike the alloys outside the invention.
  • phase T Al, Li, Si
  • phase ⁇ Al Li The microstructure of these products presents in particular very coarse particles of phase T (Al, Li, Si) of very heterogeneous sizes, rather coarse, of several ⁇ m to several hundreds of ⁇ m, and clearly higher than 10 ⁇ m on average, associated with a small amount of phase ⁇ Al Li.
  • This example shows the need to use a method involving rapid solidification for the alloys according to the invention.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Conductive Materials (AREA)
  • Silicon Compounds (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Ceramic Products (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Materials For Medical Uses (AREA)
EP86420166A 1985-06-28 1986-06-25 Aluminiumlegierungen mit hohem Lithium- und Siliziumgehalt und Verfahren zu ihrer Herstellung Expired EP0208631B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86420166T ATE45189T1 (de) 1985-06-28 1986-06-25 Aluminiumlegierungen mit hohem lithium- und siliziumgehalt und verfahren zu ihrer herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8510375A FR2584095A1 (fr) 1985-06-28 1985-06-28 Alliages d'al a hautes teneurs en li et si et un procede de fabrication
FR8510375 1985-06-28

Publications (2)

Publication Number Publication Date
EP0208631A1 true EP0208631A1 (de) 1987-01-14
EP0208631B1 EP0208631B1 (de) 1989-08-02

Family

ID=9321039

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86420166A Expired EP0208631B1 (de) 1985-06-28 1986-06-25 Aluminiumlegierungen mit hohem Lithium- und Siliziumgehalt und Verfahren zu ihrer Herstellung

Country Status (10)

Country Link
US (1) US4804423A (de)
EP (1) EP0208631B1 (de)
JP (1) JPS627828A (de)
AT (1) ATE45189T1 (de)
BR (1) BR8602980A (de)
CA (1) CA1274107A (de)
DE (1) DE3664789D1 (de)
ES (1) ES2000175A6 (de)
FR (1) FR2584095A1 (de)
IL (1) IL79198A0 (de)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282421A2 (de) * 1987-02-18 1988-09-14 Pechiney Rhenalu Zugspannungsbeständiges Lithium enthaltendes Aluminiumlegierungs-Erzeugnis und Verfahren zu seiner Herstellung
FR2637914A1 (fr) * 1988-10-17 1990-04-20 Pechiney Rhenalu Procede permettant de diminuer le taux de recristallisation de l'aluminium et de ses alliages
EP0558957A2 (de) * 1992-02-13 1993-09-08 Ykk Corporation Hochfestige und verschleissfestige Aluminiumlegierung
EP0558977A2 (de) * 1992-02-14 1993-09-08 Ykk Corporation Hochfestige, rasch erstarrte Legierung
US5458700A (en) * 1992-03-18 1995-10-17 Tsuyoshi Masumoto High-strength aluminum alloy
EP2112242A1 (de) * 2008-04-18 2009-10-28 United Technologies Corporation Wärmebehandlungsfähige L12 Aluminium-Legierungen
US7871477B2 (en) 2008-04-18 2011-01-18 United Technologies Corporation High strength L12 aluminum alloys
US7875133B2 (en) 2008-04-18 2011-01-25 United Technologies Corporation Heat treatable L12 aluminum alloys
US7875131B2 (en) 2008-04-18 2011-01-25 United Technologies Corporation L12 strengthened amorphous aluminum alloys
US7879162B2 (en) 2008-04-18 2011-02-01 United Technologies Corporation High strength aluminum alloys with L12 precipitates
US7909947B2 (en) 2008-04-18 2011-03-22 United Technologies Corporation High strength L12 aluminum alloys
US8002912B2 (en) 2008-04-18 2011-08-23 United Technologies Corporation High strength L12 aluminum alloys
US8017072B2 (en) 2008-04-18 2011-09-13 United Technologies Corporation Dispersion strengthened L12 aluminum alloys
US8409497B2 (en) 2009-10-16 2013-04-02 United Technologies Corporation Hot and cold rolling high strength L12 aluminum alloys
US8409496B2 (en) 2009-09-14 2013-04-02 United Technologies Corporation Superplastic forming high strength L12 aluminum alloys
US8409373B2 (en) 2008-04-18 2013-04-02 United Technologies Corporation L12 aluminum alloys with bimodal and trimodal distribution
US8728389B2 (en) 2009-09-01 2014-05-20 United Technologies Corporation Fabrication of L12 aluminum alloy tanks and other vessels by roll forming, spin forming, and friction stir welding
US8778099B2 (en) 2008-12-09 2014-07-15 United Technologies Corporation Conversion process for heat treatable L12 aluminum alloys
US9127334B2 (en) 2009-05-07 2015-09-08 United Technologies Corporation Direct forging and rolling of L12 aluminum alloys for armor applications
US9194027B2 (en) 2009-10-14 2015-11-24 United Technologies Corporation Method of forming high strength aluminum alloy parts containing L12 intermetallic dispersoids by ring rolling
US9611522B2 (en) 2009-05-06 2017-04-04 United Technologies Corporation Spray deposition of L12 aluminum alloys

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4758273A (en) * 1984-10-23 1988-07-19 Inco Alloys International, Inc. Dispersion strengthened aluminum alloys
GB2196647A (en) * 1986-10-21 1988-05-05 Secr Defence Rapid solidification route aluminium alloys
US5091019A (en) * 1990-02-12 1992-02-25 Allied-Signal, Inc. Rapidly solidified aluminum lithium alloys having zirconium
US5045125A (en) * 1990-04-02 1991-09-03 Allied-Signal Inc. Case toughening of aluminum-lithium forgings
JP2002144018A (ja) * 2000-11-02 2002-05-21 Yorozu Corp 軽量高強度部材の製造方法
JP2004204836A (ja) * 2002-12-13 2004-07-22 Sanyo Electric Co Ltd 電弧溶接により組み立てられるアルミニウム部材及び圧縮機
CN109423564A (zh) * 2017-08-28 2019-03-05 昭和电工株式会社 磁记录介质用铝合金基板、磁记录介质用基板、磁记录介质和硬盘驱动器
CN107699747B (zh) * 2017-09-26 2019-05-21 沈阳航空航天大学 一种高Cu含量Al-Si-Li-Cu铸造合金及其制备方法
CN107587012B (zh) * 2017-09-26 2019-04-23 沈阳航空航天大学 一种轻质铸造Al-Si-Li合金材料及其制备方法
CN107675038B (zh) * 2017-09-26 2019-04-23 沈阳航空航天大学 一种轻质铸造Al-Si-Li-Cu合金材料及其制备方法
WO2019161137A1 (en) * 2018-02-14 2019-08-22 Arconic Inc. Aluminum alloy products and methods for producing the same
CN114058912B (zh) * 2022-01-17 2022-04-08 北京理工大学 一种高比强度、比刚度铝锂合金厚壁环形件及其制备方法
US11739395B1 (en) * 2022-05-05 2023-08-29 The United States Of America As Represented By The Secretary Of The Navy Embrittled aluminum alloys for powder manufacturing

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH216204A (de) * 1937-10-29 1941-08-15 Kommanditgesellschaft Mahle Aluminium-Legierung, insbesondere für Kolben von Brennkraftmaschinen.
FR1148719A (fr) * 1955-04-05 1957-12-13 Stone & Company Charlton Ltd J Perfectionnements aux alliages à base d'aluminium
EP0143727A2 (de) * 1983-11-29 1985-06-05 Cegedur Societe De Transformation De L'aluminium Pechiney Legierungen auf Aluminiumbasis mit guter Härteerhaltung bei Hochtemperatur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4661172A (en) * 1984-02-29 1987-04-28 Allied Corporation Low density aluminum alloys and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH216204A (de) * 1937-10-29 1941-08-15 Kommanditgesellschaft Mahle Aluminium-Legierung, insbesondere für Kolben von Brennkraftmaschinen.
FR1148719A (fr) * 1955-04-05 1957-12-13 Stone & Company Charlton Ltd J Perfectionnements aux alliages à base d'aluminium
EP0143727A2 (de) * 1983-11-29 1985-06-05 Cegedur Societe De Transformation De L'aluminium Pechiney Legierungen auf Aluminiumbasis mit guter Härteerhaltung bei Hochtemperatur

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282421A2 (de) * 1987-02-18 1988-09-14 Pechiney Rhenalu Zugspannungsbeständiges Lithium enthaltendes Aluminiumlegierungs-Erzeugnis und Verfahren zu seiner Herstellung
EP0282421A3 (en) * 1987-02-18 1989-01-18 Cegedur Societe De Transformation De L'aluminium Pechiney Aluminium alloy product containing lithium resistant to corrosion under tension and process for production
FR2626009A2 (fr) * 1987-02-18 1989-07-21 Cegedur Produit en alliage d'al contenant du li resistant a la corrosion sous tension
FR2637914A1 (fr) * 1988-10-17 1990-04-20 Pechiney Rhenalu Procede permettant de diminuer le taux de recristallisation de l'aluminium et de ses alliages
EP0558957A2 (de) * 1992-02-13 1993-09-08 Ykk Corporation Hochfestige und verschleissfestige Aluminiumlegierung
EP0558957B1 (de) * 1992-02-13 1997-05-28 Ykk Corporation Hochfestige und verschleissfestige Aluminiumlegierung
EP0558977A2 (de) * 1992-02-14 1993-09-08 Ykk Corporation Hochfestige, rasch erstarrte Legierung
EP0558977A3 (en) * 1992-02-14 1993-11-10 Yoshida Kogyo Kk High-strength, rapidly solidified alloy
US5458700A (en) * 1992-03-18 1995-10-17 Tsuyoshi Masumoto High-strength aluminum alloy
US7875131B2 (en) 2008-04-18 2011-01-25 United Technologies Corporation L12 strengthened amorphous aluminum alloys
US8409373B2 (en) 2008-04-18 2013-04-02 United Technologies Corporation L12 aluminum alloys with bimodal and trimodal distribution
US7875133B2 (en) 2008-04-18 2011-01-25 United Technologies Corporation Heat treatable L12 aluminum alloys
EP2112242A1 (de) * 2008-04-18 2009-10-28 United Technologies Corporation Wärmebehandlungsfähige L12 Aluminium-Legierungen
US7879162B2 (en) 2008-04-18 2011-02-01 United Technologies Corporation High strength aluminum alloys with L12 precipitates
US7883590B1 (en) 2008-04-18 2011-02-08 United Technologies Corporation Heat treatable L12 aluminum alloys
US7909947B2 (en) 2008-04-18 2011-03-22 United Technologies Corporation High strength L12 aluminum alloys
US8002912B2 (en) 2008-04-18 2011-08-23 United Technologies Corporation High strength L12 aluminum alloys
US8017072B2 (en) 2008-04-18 2011-09-13 United Technologies Corporation Dispersion strengthened L12 aluminum alloys
US7871477B2 (en) 2008-04-18 2011-01-18 United Technologies Corporation High strength L12 aluminum alloys
US8778099B2 (en) 2008-12-09 2014-07-15 United Technologies Corporation Conversion process for heat treatable L12 aluminum alloys
US9611522B2 (en) 2009-05-06 2017-04-04 United Technologies Corporation Spray deposition of L12 aluminum alloys
US9127334B2 (en) 2009-05-07 2015-09-08 United Technologies Corporation Direct forging and rolling of L12 aluminum alloys for armor applications
US8728389B2 (en) 2009-09-01 2014-05-20 United Technologies Corporation Fabrication of L12 aluminum alloy tanks and other vessels by roll forming, spin forming, and friction stir welding
US8409496B2 (en) 2009-09-14 2013-04-02 United Technologies Corporation Superplastic forming high strength L12 aluminum alloys
US9194027B2 (en) 2009-10-14 2015-11-24 United Technologies Corporation Method of forming high strength aluminum alloy parts containing L12 intermetallic dispersoids by ring rolling
US8409497B2 (en) 2009-10-16 2013-04-02 United Technologies Corporation Hot and cold rolling high strength L12 aluminum alloys

Also Published As

Publication number Publication date
DE3664789D1 (en) 1989-09-07
CA1274107A (fr) 1990-09-18
JPS627828A (ja) 1987-01-14
ATE45189T1 (de) 1989-08-15
FR2584095A1 (fr) 1987-01-02
IL79198A0 (en) 1986-09-30
BR8602980A (pt) 1987-02-17
EP0208631B1 (de) 1989-08-02
JPH0328500B2 (de) 1991-04-19
ES2000175A6 (es) 1988-01-01
US4804423A (en) 1989-02-14

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