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    Al—Zn—Cu—Mg alloys and their manufacturing process
    32.
    发明授权
    Al—Zn—Cu—Mg alloys and their manufacturing process 有权

    公开(公告)号：US11976347B2

    公开(公告)日：2024-05-07

    申请号：US16627970

    申请日：2018-06-28

    Applicant: CONSTELLIUM ISSOIRE

    Inventor： Ricky Whelchel ,  Erembert Nizery ,  Diana Koschel ,  Jean-Christophe Ehrstrom ,  Alireza Arbab

    IPC: C22F1/053 ,  C22C21/10

    CPC classification number: C22F1/053 ,  C22C21/10

    Abstract: The invention concerns an extruded, rolled and/or forged aluminum-based alloy product having a thickness of at least 25 mm comprising (in weight %): Zn 6.70-7.40; Mg 1.50-1.80; Cu 2.20-2.60, with a Cu to Mg ratio of at least 1.30; Zr 0.04-0.14; Mn 0-0.5; Ti 0-0.15; V 0-0.15; Cr 0-0.25; Fe 0-0.15; Si 0-0.15; impurities ≤0.05 each and ≤0.15 total. The invention also concerns a method of making such a product. Products according to the invention are particularly advantageous because they exhibit simultaneously a low sensitivity to environmentally assisted cracking under conditions of high stress and humid environment, high strength and high toughness properties.

    WROUGHT PRODUCTS MADE OF 2XXX ALLOY HAVING AN OPTIMIZED CORROSION RESISTANCE, AND METHOD FOR OBTAINING SAME
    33.
    发明公开
    WROUGHT PRODUCTS MADE OF 2XXX ALLOY HAVING AN OPTIMIZED CORROSION RESISTANCE, AND METHOD FOR OBTAINING SAME 审中-公开

    公开(公告)号：US20240035137A1

    公开(公告)日：2024-02-01

    申请号：US18254386

    申请日：2021-12-16

    Applicant: CONSTELLIUM ISSOIRE

    Inventor： Melanie OLLAT ,  Jean-Christophe EHRSTROM

    IPC: C22F1/057 ,  C22C21/14 ,  C22C21/16 ,  C22C21/18 ,  C22F1/00

    CPC classification number: C22F1/057 ,  C22C21/14 ,  C22C21/16 ,  C22C21/18 ,  C22F1/002

    Abstract: A method for thermomechanical treatment of wrought products made of a 2000 series aluminum alloy comprising, in % by weight, Cu 3.5-5.8; Mg 0.2-1.5; Mn≤0.9; Fe≤0.15; Si≤0.15; Zr≤0.25; Ag≤0.8; Zn≤0.8; Ti 0.02-0.15; unavoidable impurities≤0.05 each and ≤0.15 total; remainder aluminum, enabling an improvement in the resistance to corrosion under stress. It includes a tempering consisting of two sequences. The first sequence is defined by a maximum temperature T1max comprised between 130° C. and 180° C. and by a hold time at a temperature comprised between 130° C. and 180° C. which equates to an equivalent duration t1eq160+ C. calculated at 160° C. comprised between 10 h and 80 h. The second sequence is defined by a temperature T2° C.(t) lower than T1max and a hold time t2 at a temperature comprised between 100° C. and 130° C., which equates to an equivalent time t2eq160° C. calculated at 160° C. such that t2eq160° comprised between 0.3% and 15% of the equivalent duration t1eq160° calculated for the first sequence.

    METHOD FOR TESTING A DAMAGE TOLERANCE PROPERTY OF A PART MADE OF AN ALUMINIUM ALLOY
    36.
    发明申请
    METHOD FOR TESTING A DAMAGE TOLERANCE PROPERTY OF A PART MADE OF AN ALUMINIUM ALLOY 有权

    公开(公告)号：US20210396636A1

    公开(公告)日：2021-12-23

    申请号：US17421355

    申请日：2019-12-19

    Applicant: CONSTELLIUM ISSOIRE

    Inventor： Pablo LORENZINO ,  Nicolas BAYONA-CARRILLO

    IPC: G01N3/08 ,  G01N33/20

    Abstract: The invention involves a method for testing a damage tolerance property in an aluminum alloy part with the following steps: measure at least one property representative of a the part's tensile strength; use the property measured in step a) as input datum (xi) of a neural network estimator; estimate, using the estimator, the representative property of the part's tensile strength; the method being characterized in that it includes: consideration of an acceptance threshold and comparison of the property estimated at step c) to the acceptance threshold, taking into account a confidence interval; based on the comparison: consider that the part passes the test; or consider that the part does not pass the test.

    ALUMINIUM-COPPER-LITHIUM PRODUCTS
    40.
    发明申请
    ALUMINIUM-COPPER-LITHIUM PRODUCTS 审中-公开

    公开(公告)号：US20190136356A1

    公开(公告)日：2019-05-09

    申请号：US16213328

    申请日：2018-12-07

    Applicant: Constellium Issoire

    Inventor： Fabrice HEYMES ,  Frank EBERL ,  Gaelle POUGET

    IPC: C22F1/057 ,  C22F1/04 ,  C22C21/00 ,  C22C21/16

    Abstract: The present invention relates to extruded, rolled and/or forged products. Also provided are methods of making such products based on aluminum alloy wherein a liquid metal bath is prepared comprising 2.0 to 3.5% by weight of Cu, 1.4 to 1.8% by weight of Li, 0.1 to 0.5% by weight of Ag, 0.1 to 1.0% by weight of Mg, 0.05 to 0.18% by weight of Zr, 0.2 to 0.6% by weight of Mn and at least one element selected from Cr, Sc, Hf and Ti, the quantity of said element selected, being 0.05 to 0.3% by weight for Cr and for Sc, 0.05 to 0.5% by weight for Hf and 0.01 to 0.15% by weight for Ti, the remainder being aluminum and inevitable impurities. The products and methods of the present invention offer an advantageous compromise between static mechanical strength and damage tolerance and are useful in aeronautical design.

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