公开(公告)号：US10450640B2

公开(公告)日：2019-10-22

申请号：US13962696

申请日：2013-08-08

Applicant: ALCOA INC.

Inventor： Dhruba J. Chakrabarti ,  John Liu ,  Jay H. Goodman ,  Gregory B. Venema ,  Ralph R. Sawtell ,  Cynthia M. Krist ,  Robert W. Westerlund

IPC: C22F1/053 ,  B22D17/22 ,  C22C21/10

Abstract: Aluminum alloy products, such as plate, forgings and extrusions, suitable for use in making aerospace structural components like integral wing spars, ribs and webs, comprises about: 6 to 10 wt. % Zn; 1.2 to 1.9 wt. % Mg; 1.2 to 2.2 wt. % Cu, with Mg≤(Cu+0.3); and 0.05 to 0.4 wt. % Zr, the balance Al, incidental elements and impurities. Preferably, the alloy contains about 6.9 to 8.5 wt. % Zn; 1.2 to 1.7 wt. % Mg; 1.3 to 2 wt. % Cu. This alloy provides improved combinations of strength and fracture toughness in thick gauges. When artificially aged per the 3-stage method of preferred embodiments, this alloy also achieves superior SCC performance, including under seacoast conditions.

公开(公告)号：US20130312877A1

公开(公告)日：2013-11-28

申请号：US13962696

申请日：2013-08-08

Applicant: ALCOA INC.

Inventor： Dhruba J. Chakrabarti ,  John Liu ,  Jay H. Goodman ,  Gregory B. Venema ,  Ralph R. Sawtell ,  Cynthia M. Krist ,  Robert W. Westerlund

IPC: C22F1/053

CPC classification number: C22F1/053 ,  B22D17/2209 ,  C22C21/10

Abstract: Aluminum alloy products, such as plate, forgings and extrusions, suitable for use in making aerospace structural components like integral wing spars, ribs and webs, comprises about: 6 to 10 wt. % Zn; 1.2 to 1.9 wt. % Mg; 1.2 to 2.2 wt. % Cu, with Mg≦(Cu+0.3); and 0.05 to 0.4 wt. % Zr, the balance Al, incidental elements and impurities. Preferably, the alloy contains about 6.9 to 8.5 wt. % Zn; 1.2 to 1.7 wt. % Mg; 1.3 to 2 wt. % Cu. This alloy provides improved combinations of strength and fracture toughness in thick gauges. When artificially aged per the 3-stage method of preferred embodiments, this alloy also achieves superior SCC performance, including under seacoast conditions.

Abstract translation: 适合用于制造航空航天结构部件如整体翼梁，肋骨和腹板的铝合金产品，例如板，锻件和挤压件，包括：约6至10wt。 ％Zn; 1.2〜1.9重量％ ％Mg; 1.2〜2.2重量％ ％Cu，Mg @（Cu + 0.3）; 和0.05〜0.4重量％ ％Zr，余量为Al，附带元素和杂质。 优选地，合金含有约6.9至8.5wt。 ％Zn; 1.2〜1.7重量％ ％Mg; 1.3〜2重量％ ％Cu。 该合金提供了厚度计中强度和断裂韧性的改进组合。 当根据优选实施方案的3阶段方法人工老化时，该合金还实现了优异的SCC性能，包括在海岸条件下。