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    IMPROVED LITHIUM ALUMINUM ALLOY SYSTEM
    1.
    发明申请
    IMPROVED LITHIUM ALUMINUM ALLOY SYSTEM 审中-公开
    改进的锂铝合金系统

    公开(公告)号：WO1992003583A1

    公开(公告)日：1992-03-05

    申请号：PCT/US1991006032

    申请日：1991-08-27

    Applicant: REYNOLDS METALS COMPANY

    Inventor： REYNOLDS METALS COMPANY ,  CHO, Alex

    IPC: C22C21/00

    CPC classification number: C22C21/06 ,  C22C21/00 ,  C22F1/04 ,  C22F1/047

    Abstract: An aluminum based alloy useful in aircraft and airframe structures which has low density and consists essentially of the following general formula: MgaLibZncAgdAlbal, wherein a ranges from 0.5 to 10 %, b ranges from 0.5 to 3.0 %, c ranges from 0.1 to 5.0 %, d ranges from 0.1 to 2.0 %, and bal indicates the balance of the alloy is aluminum, with the proviso that the total amount of alloying elements cannot exceed 12.0 %, with the further proviso that when a ranges from 7.0 to 10.0 %, b cannot exceed 2.5 % and c cannot exceed 2.0 %.

    IMPROVING MECHANICAL PROPERTIES OF ALUMINUM-LITHIUM ALLOYS
    2.
    发明申请
    IMPROVING MECHANICAL PROPERTIES OF ALUMINUM-LITHIUM ALLOYS 审中-公开
    改善铝合金的机械性能

    公开(公告)号：WO1994020646A1

    公开(公告)日：1994-09-15

    申请号：PCT/US1994002532

    申请日：1994-03-09

    Applicant: REYNOLDS METALS COMPANY

    Inventor： REYNOLDS METALS COMPANY ,  CHO, Alex

    IPC: C22F01/04

    CPC classification number: C22F1/04

    Abstract: Strength and ductility for aluminum-lithium alloy wrought product in the transverse direction is improved by subjecting these types of alloys to improved T8 temper practice. The wrought product, after solution heat treating and quenching is subjected to a multiple step stretching sequence prior to aging, the total percent reduction for the multiple step stretching sequence ranging between 1 and 20 percent reduction. In the multiple step stretching sequence, each of the stretching steps may have the same or different amounts of percent reduction to achieve the desired total percent reduction. An aluminum-lithium alloy wrought product subjected to the improved T8 temper practice has increased tensile yield stress and percent elongation in its transverse direction to facilitate commercial application of the product in high strength applications.

    Abstract translation: 通过使这些类型的合金改善T8回火实践，提高了铝 - 锂合金锻造产品在横向上的强度和延展性。 在固化热处理和淬火之后，锻造产品在老化之前经受多步拉伸程序，多步拉伸序列的总减少百分比范围在1％和20％之间。 在多步拉伸序列中，每个拉伸步骤可以具有相同或不同的百分比减少量以实现期望的总百分比降低。 经过改进的T8回火实践的铝锂合金锻造产品具有增加的拉伸屈服应力和其横向方向的百分比伸长率，以促进产品在高强度应用中的商业应用。

    STRENGTH ANISOTROPY REDUCTION IN ALUMINUM-LITHIUM ALLOYS BY COLD WORKING AND AGING
    3.
    发明申请
    STRENGTH ANISOTROPY REDUCTION IN ALUMINUM-LITHIUM ALLOYS BY COLD WORKING AND AGING 审中-公开
    通过冷加工和老化在铝合金中强度的均相还原

    公开(公告)号：WO1994008060A1

    公开(公告)日：1994-04-14

    申请号：PCT/US1993009505

    申请日：1993-10-05

    Applicant: REYNOLDS METALS COMPANY

    Inventor： REYNOLDS METALS COMPANY ,  CHO, Alex

    IPC: C22C21/00

    CPC classification number: C22F1/04

    Abstract: Strength anisotropy of aluminum-lithium alloy wrought products is reduced by subjecting these types of alloys to improved T8 temper practice. The wrought product, after solution heat treating and quenching, is subjected to a combination of cold rolling and stretching steps prior to aging. The cold rolling can range between 1 and 20 % reduction with the stretching step ranging between 0.5-10 %. The cold rolling step may be performed in one or a multiple of passes. When multiple passes are used, the cold rolling may be done in different directions to further enhance reductions in strength anisotropy for these types of alloys. Table X and Figure 8 summarize the results of inventive practive (D), (E) or (F) on the highest and the lowest (TYS) value and compares it with the conventional practice. The relative closeness of (TYS) by inventive practice suggests commercial exploitation of the wrought Al-Li alloys in high strength applications.

    Abstract translation: 通过使这些类型的合金改善T8回火实践，铝 - 锂合金锻造产品的强度各向异性降低。 在固化热处理和淬火之后，锻造产品在老化之前经受冷轧和拉伸步骤的组合。 拉伸步骤的范围在0.5-10％之间，冷轧可缩小1％至20％。 冷轧步骤可以以一次或多次通过进行。 当使用多道次时，可以在不同的方向进行冷轧，以进一步增强这些类型的合金的强度各向异性的降低。 表X和图8总结了本发明实践（D），（E）或（F）对最高和最低（TYS）值的结果，并将其与常规实践进行比较。 通过创新实践，（TYS）的相对接近度表明在高强度应用中对锻造的Al-Li合金的商业开发。

    IMPROVED LITHIUM ALUMINUM ALLOY SYSTEM
    6.
    发明授权
    IMPROVED LITHIUM ALUMINUM ALLOY SYSTEM 失效
    改进的铝锂合金系统

    公开(公告)号：EP0546103B1

    公开(公告)日：1996-02-07

    申请号：EP91917972.1

    申请日：1991-08-27

    Applicant: REYNOLDS METALS COMPANY

    Inventor： CHO, Alex

    IPC: C22C21/00 ,  C22F1/04

    CPC classification number: C22C21/06 ,  C22C21/00 ,  C22F1/04 ,  C22F1/047

    Abstract: An aluminum based alloy useful in aircraft and airframe structures which has low density and consists essentially of the following general formula: MgaLibZncAgdAlbal, wherein a ranges from 0.5 to 10 %, b ranges from 0.5 to 3.0 %, c ranges from 0.1 to 5.0 %, d ranges from 0.1 to 2.0 %, and bal indicates the balance of the alloy is aluminum, with the proviso that the total amount of alloying elements cannot exceed 12.0 %, with the further proviso that when a ranges from 7.0 to 10.0 %, b cannot exceed 2.5 % and c cannot exceed 2.0 %.

    IMPROVING MECHANICAL PROPERTIES OF ALUMINUM-LITHIUM ALLOYS
    9.
    发明公开
    IMPROVING MECHANICAL PROPERTIES OF ALUMINUM-LITHIUM ALLOYS 失效
    提高铝锂合金的力学性能

    公开(公告)号：EP0694085A1

    公开(公告)日：1996-01-31

    申请号：EP94911513.0

    申请日：1994-03-09

    Applicant: REYNOLDS METALS COMPANY

    Inventor： CHO, Alex

    IPC: C22C21 ,  C22F1

    CPC classification number: C22F1/04

    Abstract: Strength and ductility for aluminum-lithium alloy wrought product in the transverse direction is improved by subjecting these types of alloys to improved T8 temper practice. The wrought product, after solution heat treating and quenching is subjected to a multiple step stretching sequence prior to aging, the total percent reduction for the multiple step stretching sequence ranging between 1 and 20 percent reduction. In the multiple step stretching sequence, each of the stretching steps may have the same or different amounts of percent reduction to achieve the desired total percent reduction. An aluminum-lithium alloy wrought product subjected to the improved T8 temper practice has increased tensile yield stress and percent elongation in its transverse direction to facilitate commercial application of the product in high strength applications.

    Abstract translation: 通过对这些类型的合金进行改进的T8回火实践来改善铝 - 锂合金锻造产品的横向强度和延展性。 锻造产品在固溶热处理和淬火之后在老化之前经受多步骤拉伸序列，多步骤拉伸序列的总减少百分比范围在减少1％和20％之间。 在多步骤拉伸序列中，每个拉伸步骤可以具有相同或不同的减少百分比量以实现期望的总减少百分比。 经过改进的T8回火实践的铝锂合金锻造产品在其横向方向上具有增加的拉伸屈服应力和百分伸长率，以促进产品在高强度应用中的商业应用。

    IMPROVING MECHANICAL PROPERTIES OF ALUMINUM-LITHIUM ALLOYS
    10.
    发明授权
    IMPROVING MECHANICAL PROPERTIES OF ALUMINUM-LITHIUM ALLOYS 失效
    增铝 - 锂合金的机械性能

    公开(公告)号：EP0694085B1

    公开(公告)日：1998-08-26

    申请号：EP94911513.3

    申请日：1994-03-09

    Applicant: REYNOLDS METALS COMPANY

    Inventor： CHO, Alex

    IPC: C22F1/04 ,  C22C21/00

    CPC classification number: C22F1/04

    Abstract: Strength and ductility for aluminum-lithium alloy wrought product in the transverse direction is improved by subjecting these types of alloys to improved T8 temper practice. The wrought product, after solution heat treating and quenching is subjected to a multiple step stretching sequence prior to aging, the total percent reduction for the multiple step stretching sequence ranging between 1 and 20 percent reduction. In the multiple step stretching sequence, each of the stretching steps may have the same or different amounts of percent reduction to achieve the desired total percent reduction. An aluminum-lithium alloy wrought product subjected to the improved T8 temper practice has increased tensile yield stress and percent elongation in its transverse direction to facilitate commercial application of the product in high strength applications.

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