EP0164294A1 - Lithium-, kupfer- und magnesiumhaltige Legierungen auf Aluminiumbasis - Google Patents

Lithium-, kupfer- und magnesiumhaltige Legierungen auf Aluminiumbasis Download PDF

Info

Publication number
EP0164294A1
EP0164294A1 EP85420044A EP85420044A EP0164294A1 EP 0164294 A1 EP0164294 A1 EP 0164294A1 EP 85420044 A EP85420044 A EP 85420044A EP 85420044 A EP85420044 A EP 85420044A EP 0164294 A1 EP0164294 A1 EP 0164294A1
Authority
EP
European Patent Office
Prior art keywords
alloys
alloy
tempering
quenching
homogenization
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
EP85420044A
Other languages
English (en)
French (fr)
Other versions
EP0164294B1 (de
Inventor
Bruno Dubost
Philippe Meyer
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
Publication of EP0164294A1 publication Critical patent/EP0164294A1/de
Application granted granted Critical
Publication of EP0164294B1 publication Critical patent/EP0164294B1/de
Expired legal-status Critical Current

Links

Images

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
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium

Definitions

  • the present invention relates to alloys based on Al, containing essentially Li, Cn and Mg: and having high specific characteristics and high ductility.
  • lithium alloys It is known to metallurgists that the addition of lithium decreases the density and increases the modulus of elasticity and the mechanical resistance of aluminum alloys. This explains the designers' interest in these alloys for applications in the aeronautical industry, and more particularly, for lithium aluminum alloys containing other addition elements such as magnesium or copper.
  • lithium alloys must imperatively have ductility and toughness at least equivalent, with mechanical strength equal to that of conventional aeronautical alloys such as alloys 2024-T4 or T351, 2214T6 (51), 7175-T73 (51 ) or T7652 and 7150-T651 (according to the nomenclature of the Aluminum Association), which is not the case for known lithium alloys.
  • the resistance and elongation levels obtained on thin sheets in the T8 state and on thick sheets in the T651 state are however still lower than those of aeronautical alloys of the 2000 to 7000 series, as for the other alloys of the AlLiCu and AlLiCuMg with a lithium content greater than 1.7% known to date, whether these are products obtained by ingot metallurgy (for example, in semi-continuous casting) or by powder metallurgy.
  • the content of main elements is preferably held individually or in combination, between 1.7 and 2.5% for Li, between 1.2 and 2.2% for Mg and 1.7 and 3.0% for Cu.
  • the Cu value can be limited between 2 and 2.7%.
  • the Zr content is preferably between 0.10 and 0.18%. Iron and silicon are preferably kept below 0.10 and 0.06% respectively.
  • Homogenization can be done in a temperature range between ⁇ + 10 (° C) and ⁇ - 20 (° C); the dissolution is preferably carried out between 0 + 10 ° C.
  • the optimal durations of heat treatment for homogenization at temperature ⁇ are 0.5 to 8 hours for alloys produced by rapid solidification (atomization - splat cooling - or any other means) and 12 to 72 hours for molded products or produced in semi-continuous casting.
  • alloys have their optimal mechanical properties after tempering of durations of 8 to 48 hours at temperatures between 170 and 220 ° C (preferably between 180 and 200 ° C) and it is preferable to subject the products to adequate form (sheets , bars, widgets) work hardening giving rise to a plastic deformation of 1 to 5% (preferably 2 to 4%) between quenching and tempering, which makes it possible to further improve the mechanical resistance of the products without degrading their ductility.
  • the alloys according to the invention have a higher mechanical strength and ductility than those of the well known alloy AlLiMgMn 01420 (Al - 5% Mg - 2% Li - 0.6% Mn) and have a compromise between higher mechanical strength and ductility than known AlLiCuMg alloys (low magnesium contents). They also have excellent resistance to laminating corrosion.
  • alloys are therefore particularly advantageous for the manufacture of molded or wrought semi-finished products (produced by semi-continuous casting, atomization or splat cooling, etc.) whether they are, for example, extruded, rolled, forged or stamped.
  • Figure 1 shows, in perspective, a stamped part relating to Example 2 given below.
  • Billet ⁇ 200 mm were poured semi-continuously and have the analyzes shown in Table I (a). Unless otherwise indicated, the Fe and Si contents of the flows used are less than 0.04% and 0.03% respectively. These correspond either to conventional alloys (C, D), or to a known lithium alloy (E), or to alloys according to the invention (A, F) or outside the invention (B). These billets have been homogenized and spun into largets 100 x 13 mm. These were then dissolved, soaked in water and returned under the conditions given in Table I (b). The results of the mechanical tensile characteristics obtained in the long direction and through long direction are reported in Table I (c) with measurements of Ferracity (factor Kic) in the direction (LT).
  • alloys according to the invention (A and F) have higher elongations and toughness than those of the known Li alloy (E) with equivalent elastic limits.
  • the mechanical tensile properties obtained on alloys A and F are, moreover, close to those of conventional alloys.
  • Billet ⁇ 200 mm were poured semi-continuously, homogenized, then transformed by spinning and stamping into precision stamps, the shape of which is shown in fig. 1.
  • These consist of a flat bottom rectangular (1) of dimensions 489 x 70 x 3 mm, bordered, on its two longitudinal edges and a transverse edge, with three ribs (2) perpendicular to the bottom, 40 to 60 mm high and 3 to 5 mm thick, the longitudinal edges being separated by three small spacers (3) 1.5 mm thick.
  • the heat treatments carried out are reported in Table II (b) and the results of the mechanical characteristics obtained in the long and long transverse directions are reported in Table II (c).
  • alloys according to the invention (A and F) lead on precision stamps (not hardened between quenching and tempering) at levels of mechanical resistance and ductility at least equal to those of alloy 7175 (H ) normally used for this type of product, but more dense.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Conductive Materials (AREA)
  • Powder Metallurgy (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
EP85420044A 1984-03-15 1985-03-13 Lithium-, kupfer- und magnesiumhaltige Legierungen auf Aluminiumbasis Expired EP0164294B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8404482A FR2561261B1 (fr) 1984-03-15 1984-03-15 Alliages a base d'al contenant du lithium, du cuivre et du magnesium
FR8404482 1984-03-15

Publications (2)

Publication Number Publication Date
EP0164294A1 true EP0164294A1 (de) 1985-12-11
EP0164294B1 EP0164294B1 (de) 1989-01-18

Family

ID=9302351

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85420044A Expired EP0164294B1 (de) 1984-03-15 1985-03-13 Lithium-, kupfer- und magnesiumhaltige Legierungen auf Aluminiumbasis

Country Status (9)

Country Link
US (1) US4752343A (de)
EP (1) EP0164294B1 (de)
JP (2) JPS60215735A (de)
BR (1) BR8501143A (de)
CA (1) CA1268643A (de)
DE (1) DE3567677D1 (de)
ES (1) ES8606516A1 (de)
FR (1) FR2561261B1 (de)
IL (1) IL74562A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008141420A1 (en) * 2007-05-18 2008-11-27 Research In Motion Limited Method and system for discontinuous reception de-synchronization detection

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62297433A (ja) * 1986-06-18 1987-12-24 Sumitomo Light Metal Ind Ltd 構造用Ａｌ―Ｃｕ―Ｍｇ―Ｌｉ系アルミニウム合金材料の製造方法
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
US5455003A (en) * 1988-08-18 1995-10-03 Martin Marietta Corporation Al-Cu-Li alloys with improved cryogenic fracture toughness
US5512241A (en) * 1988-08-18 1996-04-30 Martin Marietta Corporation Al-Cu-Li weld filler alloy, process for the preparation thereof and process for welding therewith
US5259897A (en) * 1988-08-18 1993-11-09 Martin Marietta Corporation Ultrahigh strength Al-Cu-Li-Mg alloys
US5462712A (en) * 1988-08-18 1995-10-31 Martin Marietta Corporation High strength Al-Cu-Li-Zn-Mg alloys
US5085830A (en) * 1989-03-24 1992-02-04 Comalco Aluminum Limited Process for making aluminum-lithium alloys of high toughness
US5211910A (en) * 1990-01-26 1993-05-18 Martin Marietta Corporation Ultra high strength aluminum-base alloys
US5133931A (en) * 1990-08-28 1992-07-28 Reynolds Metals Company Lithium aluminum alloy system
US5198045A (en) * 1991-05-14 1993-03-30 Reynolds Metals Company Low density high strength al-li alloy
CA2579224C (en) * 2004-09-06 2010-04-06 Federalnoe Gosudarstvennoe Unitarnoe Predpriyatie "Vserossiysky Nauchno- Issledovatelsky Institut Aviatsionnykh Materialov" Aluminium-based alloy and the article made thereof
EP2829623B1 (de) 2007-12-04 2018-02-07 Arconic Inc. Verbesserte Aluminium-Kupfer-Lithium-Legierungen
FR3065012B1 (fr) * 2017-04-10 2022-03-18 Constellium Issoire Produits en alliage aluminium-cuivre-lithium a faible densite
CN108823519B (zh) * 2018-07-02 2021-10-01 鼎镁新材料科技股份有限公司 一种高Mg含量中强高延变形铝锂合金及其热处理方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0090583A2 (de) * 1982-03-31 1983-10-05 Alcan International Limited Wärmebehandlung von Aluminiumlegierungen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0088511B1 (de) * 1982-02-26 1986-09-17 Secretary of State for Defence in Her Britannic Majesty's Gov. of the United Kingdom of Great Britain and Northern Ireland Aluminiumlegierungen
CA1198656A (en) * 1982-08-27 1985-12-31 Roger Grimes Light metal alloys
JPS59118848A (ja) * 1982-12-27 1984-07-09 Sumitomo Light Metal Ind Ltd 電気抵抗を高めた構造用アルミニウム合金

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0090583A2 (de) * 1982-03-31 1983-10-05 Alcan International Limited Wärmebehandlung von Aluminiumlegierungen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ALUMINUM-LITHIUM ALLOYS II, PROCEEDINGS OF THE SECOND INTERNATIONAL ALUMINUM-LITHIUM CONFERENCE SPONSORED BY THE NONFERROUS METALS COMMITTE OF THE MTALLUGICAL SOCIETY OF AIME, 12-14 avril 1983, Monterey, California, pages 255-285, The Metallurgical Society of AIME; R.J. KAR et al.: "Correlation of microstructures, aging treatments" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008141420A1 (en) * 2007-05-18 2008-11-27 Research In Motion Limited Method and system for discontinuous reception de-synchronization detection

Also Published As

Publication number Publication date
JPS63290252A (ja) 1988-11-28
JPS60215735A (ja) 1985-10-29
IL74562A0 (en) 1985-06-30
JPH0440418B2 (de) 1992-07-02
EP0164294B1 (de) 1989-01-18
DE3567677D1 (en) 1989-02-23
ES8606516A1 (es) 1986-04-16
FR2561261A1 (fr) 1985-09-20
US4752343A (en) 1988-06-21
ES541146A0 (es) 1986-04-16
FR2561261B1 (fr) 1992-07-24
IL74562A (en) 1988-11-15
CA1268643A (fr) 1990-05-08
BR8501143A (pt) 1985-11-12

Similar Documents

Publication Publication Date Title
EP0164294B1 (de) Lithium-, kupfer- und magnesiumhaltige Legierungen auf Aluminiumbasis
EP0162096B1 (de) Legierungen auf aluminiumbasis mit lithium, magnesium und kupfer
EP0158571B1 (de) Al-Cu-Li-Mg-Legierungen mit sehr hohem spezifischen mechanischen Widerstand
CA2143551C (fr) Alliage 7000 a haute resistance mecanique et procede d'obtention
KR100754039B1 (ko) 다이캐스팅합금
AU2005269483B2 (en) An Al-Si-Mg-Zn-Cu alloy for aerospace and automotive castings
US7625454B2 (en) Al-Si-Mg-Zn-Cu alloy for aerospace and automotive castings
RU2406773C2 (ru) Деформированный алюминиевый сплав системы алюминий-цинк-магний-скандий и способ его получения
US6511555B2 (en) Cylinder head and motor block castings
EP2675933B1 (de) Aluminium-lithium-legierungen der serie 2xxx
JP6871990B2 (ja) アルミニウム合金板及びその製造方法
EP4162089B1 (de) Verwendung von produkten aus einer bei hoher temperatur gut ausbildenden aluminium-kupfer-magnesium-legierung
US20230175103A1 (en) New 6xxx aluminum alloys and methods for producing the same
EP0157711B1 (de) Verfahren zur Herstellung von Gegenständen aus Al-Li-Mg-Cu Legierungen mit hoher Duktilität und Isotropie
RU2237098C1 (ru) Сплав на основе алюминия и изделие, выполненное из него
EP0173632B1 (de) Hochfeste Aluminiumlegierung des A-SG-Typs für stranggepresste oder im Gesenk geschmiedete Gegenstände
ES2286556T3 (es) Aleacion de aluminio forjado.
EP2783020B1 (de) Kornfeinung, aluminiumgusslegierungen
JP2003277868A (ja) 耐応力腐食割れ性に優れたアルミニウム合金鍛造材および鍛造材用素材
JP2007277660A (ja) マグネシウム合金及びダイカスト製品
RU2560485C1 (ru) Высокопрочный сплав на основе алюминия и изделие, выполненное из него
RU2001150C1 (ru) Сплав на основе алюмини
Allen et al. A calorimetric evaluation of the role of impurities in the nucleation of secondary phases in 1xxx Al alloys
RU2030477C1 (ru) Литейный сплав на основе алюминия
RU2117713C1 (ru) Сплав на основе алюминия

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19851224

17Q First examination report despatched

Effective date: 19860805

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE FR GB IT LI NL SE

ITF It: translation for a ep patent filed

Owner name: ING. A. GIAMBROCONO & C. S.R.L.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3567677

Country of ref document: DE

Date of ref document: 19890223

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19910331

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19920218

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19920320

Year of fee payment: 8

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19921001

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19930314

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19930331

BERE Be: lapsed

Owner name: CEGEDUR SOC. DE TRANSFORMATION DE L'ALUMINIUM PEC

Effective date: 19930331

EUG Se: european patent has lapsed

Ref document number: 85420044.1

Effective date: 19931008

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19960226

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970214

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970219

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19970311

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19970331

Ref country code: CH

Effective date: 19970331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980313

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19980331

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980313

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST