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    Transformation process of Al—Cu—Li alloy sheets
    3.
    发明授权
    Transformation process of Al—Cu—Li alloy sheets 有权

    公开(公告)号：US11667994B2

    公开(公告)日：2023-06-06

    申请号：US16184046

    申请日：2018-11-08

    Applicant: CONSTELLIUM ISSOIRE

    Inventor： Frank Eberl ,  Bernard Bes

    IPC: C22C21/12 ,  C22C21/16 ,  C22F1/057

    CPC classification number: C22C21/12 ,  C22C21/16 ,  C22F1/057

    Abstract: The invention concerns a process to manufacture a flat-rolled product, notably for the aeronautic industry containing aluminum alloy, in which, notably a flattening and/or stretching is performed with a cumulated deformation of at least 0.5% and less than 3%, and a short heat-treatment is performed in which the sheet reaches a temperature between 130° C. and 170° C. for a period of 0.1 to 13 hours. The invention notably makes it possible to simplify the forming process of fuselage skins and to improve the balance between static mechanical strength properties and damage tolerance properties.

    AL-ZN-CU-MG ALLOYS WITH HIGH STRENGTH AND METHOD OF FABRICATION
    4.
    发明申请
    AL-ZN-CU-MG ALLOYS WITH HIGH STRENGTH AND METHOD OF FABRICATION 有权

    公开(公告)号：US20230012938A1

    公开(公告)日：2023-01-19

    申请号：US17943827

    申请日：2022-09-13

    Applicant: CONSTELLIUM ISSOIRE

    Inventor： Ricky WHELCHEL ,  Erembert NIZERY ,  Diana KOSCHEL ,  Jean-Christophe EHRSTROM ,  Timothy WARNER

    IPC: C22C21/10 ,  B64C3/18 ,  C22F1/053

    Abstract: The invention relates to a rolled product made of aluminum alloy with a thickness of at least 50 mm comprising (in weight %): Zn 6.9-7.5; Mg 1.8-2.2; Cu 1.8-2.2, where the sum Cu+Mg is between 3.8 and 4.2; Zr 0.04-0.14; Mn 0-0.1; Ti 0-0.15; V 0-0.1; Fe≤0.15; If ≤0.15; impurities ≤0.05 each and ≤0.15 total, balance aluminum. The invention also relates to the method of manufacturing such a product. The products according to the invention are particularly advantageous because they have a very favorable compromise between static mechanical strength, toughness and environmental-assisted cracking performance under conditions of high stress and humid environment.

    Extrados structural element made from an aluminium copper lithium alloy
    5.
    发明授权
    Extrados structural element made from an aluminium copper lithium alloy 有权

    公开(公告)号：US11472532B2

    公开(公告)日：2022-10-18

    申请号：US14899743

    申请日：2014-06-18

    Applicant: CONSTELLIUM ISSOIRE

    Inventor： Armelle Danielou ,  Gaelle Pouget ,  Christophe Sigli

    IPC: B64C3/26 ,  C22F1/057 ,  C22C21/12 ,  B22D21/00 ,  C21D1/30 ,  C21D8/00 ,  C22C1/02 ,  C22C21/14 ,  C22C21/16

    Abstract: Extrados structural element made from an aluminum, copper and lithium alloy and method for manufacturing same. An alloy with composition (in wt %) 4.2-5.2 Cu, 0.9-1.2 Li, 0.1-0.3 Ag, 0.1-0.25 Mg, 0.08-0.18 Zr, 0.01-0.15 Ti, an Fe and Si content level less than or equal to 0.1% each, and other element with content level less than or equal to 0.05% each and 0.15% in total, is poured, homogenized, deformed hot, placed in a solution at a temperature of at least 515° C., pulled from 0.5 to 5% and annealed. The combination of magnesium, copper and manganese content with the temperature in solution can reach an advantageous elasticity under compression limit. Products having a thickness of at least 12 mm have, in the longitudinal direction, an elasticity under compression limit of at least 645 MPa and an elongation of at least 7%.

    AL-ZN-CU-MG ALLOYS AND THEIR MANUFACTURING PROCESS
    6.
    发明申请
    AL-ZN-CU-MG ALLOYS AND THEIR MANUFACTURING PROCESS 有权

    公开(公告)号：US20220081740A1

    公开(公告)日：2022-03-17

    申请号：US17415590

    申请日：2019-12-18

    Applicant: CONSTELLIUM ISSOIRE

    Inventor： Erembert NIZERY ,  Ricky WHELCHEL ,  Jean-Christophe EHRSTROM

    IPC: C22C21/10 ,  C22F1/053 ,  C21D9/46

    Abstract: The invention relates to a rolled aluminum-based alloy product having a thickness of at least 80 mm comprising, (in weight %): Zn 6.85-7.25, Mg 1.55-1.95, Cu 1.90-2.30, Zr 0.04-0.10, Ti 0-0.15, Fe 0-0.15, Si 0-0.15, other elements ≤0.05 each and ≤0.15 total, remainder Al, wherein at mid-thickness more than 75% of grains are recrystallized or at mid-thickness 30 to 75% of grains are recrystallized and non-recrystallized grains have an aspect ratio in a L/ST cross section less than 3. A process for the manufacture of a rolled aluminum-based alloy product comprises the steps of: (a) casting an ingot made in an alloy according to the invention, (b) conducting an homogenization of the ingot (c) conducting hot rolling of said homogenized ingot in one or more stages by rolling, (d) conducting a solution heat treatment a quench, (e) conducting stress relieving, and, (f) conducting an artificial aging treatment. The products of the invention are suitable for aircraft construction and have advantageous fatigue crack growth properties.

    AL-ZN-CU-MG ALLOYS WITH HIGH STRENGTH AND METHOD OF FABRICATION
    10.
    发明申请
    AL-ZN-CU-MG ALLOYS WITH HIGH STRENGTH AND METHOD OF FABRICATION 审中-公开

    公开(公告)号：US20200232072A1

    公开(公告)日：2020-07-23

    申请号：US16650285

    申请日：2018-09-24

    Applicant: CONSTELLIUM ISSOIRE

    Inventor： Ricky WHELCHEL ,  Erembert NIZERY ,  Diana KOSCHEL ,  Jean-Christophe EHRSTROM ,  Timothy WARNER

    IPC: C22C21/10 ,  C22F1/053 ,  B64C3/18

    Abstract: The invention relates to a rolled product made of aluminum alloy with a thickness of at least 50 mm comprising (in weight %): Zn 6.9-7.5; Mg 1.8-2.2; Cu 1.8-2.2, where the sum Cu+Mg is between 3.8 and 4.2; Zr 0.04-0.14; Mn 0-0.1; Ti 0-0.15; V 0-0.1; Fe≤0.15; If≤0.15; impurities ≤0.05 each and ≤0.15 total, balance aluminum. The invention also relates to the method of manufacturing such a product. The products according to the invention are particularly advantageous because they have a very favorable compromise between static mechanical strength, toughness and environmental-assisted cracking performance under conditions of high stress and humid environment.

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