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    WROUGHT PRODUCTS MADE OF 2XXX ALLOY HAVING AN OPTIMIZED CORROSION RESISTANCE, AND METHOD FOR OBTAINING SAME
    1.
    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.

    AL-ZN-CU-MG ALLOYS WITH HIGH STRENGTH AND METHOD OF FABRICATION
    2.
    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.

    AL-ZN-CU-MG ALLOYS AND THEIR MANUFACTURING PROCESS
    3.
    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
    4.
    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.

    PROCESS FOR MANUFACTURING A BIMETALLIC PART USING A DILATION-CAUSING THERMAL TREATMENT
    5.
    发明申请
    PROCESS FOR MANUFACTURING A BIMETALLIC PART USING A DILATION-CAUSING THERMAL TREATMENT 有权

    公开(公告)号：US20210238706A1

    公开(公告)日：2021-08-05

    申请号：US16973111

    申请日：2019-06-27

    Applicant: CONSTELLIUM ISSOIRE

    Inventor： Jean-Christophe EHRSTROM ,  Julien LAYE ,  Sylvie ARSENE ,  Timothy WARNER

    IPC: C21D9/50 ,  B23K20/233 ,  G16C60/00

    Abstract: A process for manufacturing a bimetallic part by means of a first component formed by a first aluminum alloy and a second component formed by a second aluminum alloy, said process involving: assembling the first component and the second component to obtain an assembled part; applying a thermal treatment to the assembled part at a temperature of 100 to 250° C., the thermal treatment causing the assembled part to deform, in particular as a result of a metallurgical deformation by a precipitation of hardening phases of the first component and/or the second component; cooling the part to ambient temperature, upon which the part remains deformed. The process involves, prior to the assembling step, an estimation of the degree of deformation that the assembled part will undergo under the effect of the thermal treatment.

    METHOD OF MANUFACTURING A STRUCTURAL ELEMENT
    6.
    发明申请
    METHOD OF MANUFACTURING A STRUCTURAL ELEMENT 审中-公开

    公开(公告)号：US20200078862A1

    公开(公告)日：2020-03-12

    申请号：US16466653

    申请日：2017-12-07

    Applicant: CONSTELLIUM ISSOIRE

    Inventor： Jean-Christophe EHRSTROM ,  Bechir CHEHAB

    IPC: B22F3/105 ,  B33Y10/00

    Abstract: The invention is a method of manufacturing, from a workpiece, a metallic structural element comprising a skin, from which stringers extend. According to the invention, some of the stringers are obtained by machining, while the others are obtained by addition of material. The material can be added by an additive manufacturing process.

    THICK PLATES MADE OF AL-CU-LI ALLOY WITH IMPROVED FATIGUE PROPERTIES
    9.
    发明公开
    THICK PLATES MADE OF AL-CU-LI ALLOY WITH IMPROVED FATIGUE PROPERTIES 审中-公开

    公开(公告)号：US20240035138A1

    公开(公告)日：2024-02-01

    申请号：US18448998

    申请日：2023-08-14

    Applicant: CONSTELLIUM ISSOIRE

    Inventor： Jean-Christophe EHRSTROM ,  Carla DA FONSECA BARBATTI

    IPC: C22F1/057 ,  C22C21/12 ,  C22C21/14 ,  C22C21/16 ,  C22C21/18

    CPC classification number: C22F1/057 ,  C22C21/12 ,  C22C21/14 ,  C22C21/16 ,  C22C21/18

    Abstract: The invention relates to a rolled product having a thickness of at least 50 mm made of aluminium alloy comprising, in % by weight, 2.2% to 3.9% of Cu, 0.7% to 1.8% of Li, 0.1% to 0.8% of Mg, 0.1% to 0.6% of Mn; 0.01% to 0.15% of Ti, at least one element chosen from Zn and Ag, the amount of said element, if it is chosen, being 0.2% to 0.8% for Zn and 0.1% to 0.5% for Ag, optionally at least one element chosen from Zr, Cr, Sc, Hf, and V, the amount of said element, if it is chosen, being 0.04% to 0.18% for Zr, 0.05% to 0.3% for Cr and for Sc, 0.05% to 0.5% for Hf and for V, less than 0.1% of Fe, less than 0.1% of Si, the remainder being aluminium and inevitable impurities, having a content of less than 0.05% each and 0.15% in total; characterized in that its granular structure is predominantly recrystallised between ¼ and ½ thickness. The invention also relates to the process for manufacturing such a product. The products according to the invention are advantageously used in aircraft construction, in particular for the production of an aircraft wing spar or rib.

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