Heat treatable aluminum alloys having magnesium and zinc and methods for producing the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C22F-001/047
C22C-021/06
C22C-021/08
C22C-021/10
C22F-001/053
출원번호
US-0791988
(2013-03-09)
등록번호
US-9587298
(2017-03-07)
발명자
/ 주소
Lin, Jen C.
Newman, John M.
Sawtell, Ralph R.
Kamat, Rajeev G.
Boysel, Darl G.
Bray, Gary H.
Bryant, James Daniel
Connor, Brett P.
Greco, Mario
Iasella, Gino Norman
McNeish, David J.
Murtha, Shawn J.
Rioja, Roberto J.
Sullivan, Shawn P.
출원인 / 주소
ARCONIC INC.
대리인 / 주소
Greenberg Traurig, LLP
인용정보
피인용 횟수 :
1인용 특허 :
51
초록▼
New magnesium-zinc aluminum alloy bodies and methods of producing the same are disclosed. The new magnesium-zinc aluminum alloy bodies generally include 3.0-6.0 wt. % magnesium and 2.5-5.0 wt. % zinc, where at least one of the magnesium and the zinc is the predominate alloying element of the aluminu
New magnesium-zinc aluminum alloy bodies and methods of producing the same are disclosed. The new magnesium-zinc aluminum alloy bodies generally include 3.0-6.0 wt. % magnesium and 2.5-5.0 wt. % zinc, where at least one of the magnesium and the zinc is the predominate alloying element of the aluminum alloy bodies other than aluminum, and wherein (wt. % Mg)/(wt. % Zn) is from 0.6 to 2.40, and may be produced by preparing the aluminum alloy body for post-solutionizing cold work, cold working by at least 25%, and then thermally treating. The new magnesium-zinc aluminum alloy bodies may realize improved strength and other properties.
대표청구항▼
1. A method comprising: (a) preparing an aluminum alloy body for post-solutionizing cold working, the aluminum alloy body comprising 3.25-6.0 wt. % magnesium and 2.5-5.0 wt. % zinc, where at least one of the magnesium and the zinc is the predominate alloying element of the aluminum alloy body other
1. A method comprising: (a) preparing an aluminum alloy body for post-solutionizing cold working, the aluminum alloy body comprising 3.25-6.0 wt. % magnesium and 2.5-5.0 wt. % zinc, where at least one of the magnesium and the zinc is the predominate alloying element of the aluminum alloy body other than aluminum, and wherein a ratio of wt. % Mg, to wt. % Zn is from 0.6 to 2.40; (i) wherein the preparing comprises solutionizing by solution heat treating and then quenching the aluminum alloy body, where the quenching reduces the temperature of the aluminum alloy body to a temperature of not greater than 200° F. and a rate of at least 200° F. per second;(b) after the preparing step, cold working the aluminum alloy body, wherein the cold working induces at least 25% cold work in the aluminum alloy body;(c) after the cold working step, thermally treating the aluminum alloy body, wherein the thermally treating step comprises: (i) forming the aluminum alloy body into a predetermined shaped product, wherein, during the forming step, the aluminum alloy body is subjected to a temperature in the range of from at least 150° F. to below the recrystallization temperature of the aluminum alloy body. 2. The method of claim 1, wherein the thermally treating step comprises: heating the aluminum alloy body for a time and at a temperature sufficient to achieve a selected condition, wherein the heating step occurs before the forming step. 3. The method of claim 2, wherein the selected condition is an underaged condition, and wherein the method comprises: selecting the underaged condition, wherein the selecting step occurs prior to the thermally treating step;completing the heating step to achieve the underaged condition. 4. The method of claim 3, comprising after the completing step, performing the forming step, wherein, after the forming, the predetermined shaped product achieves at least one predetermined property. 5. The method of claim 4, wherein the at least one predetermined property is a predetermined strength. 6. The method of claim 4, wherein the at least one predetermined property is a predetermined combination of strength and ductility. 7. The method of claim 5, wherein the predetermined property is an underaged condition. 8. The method of claim 7, wherein the underaged condition is within 30% of peak strength. 9. The method of claim 7, wherein the underaged condition is within 10% of peak strength. 10. The method of claim 1, wherein the heating step is a first heating step, wherein the thermally treating step comprises: second heating of the aluminum alloy body, wherein the second heating occurs after the forming step. 11. The method of claim 10, wherein the second heating comprises heating the aluminum alloy body to achieve a second selected condition. 12. The method of claim 11, wherein the second selected condition is one of a second predetermined strength, a second predetermined ductility, and a second predetermined combination of strength and ductility. 13. The method of claim 12, wherein the second predetermined strength is peak strength. 14. The method of claim 12, wherein the predetermined strength is an overaged strength, wherein the overaged strength is at least 2% lower than the peak strength. 15. The method of claim 1, wherein, after the forming step (c)(i), the predetermined shaped product realizes higher long-transverse tensile yield strength relative to the long-transverse tensile yield strength of the aluminum alloy body in an as cold worked condition. 16. The method of claim 1, wherein, after the forming step, the predetermined shaped product is within 10% of peak strength. 17. The method of claim 1, wherein, after the forming step, the predetermined shaped product is within 5% of peak strength. 18. The method of claim 1, wherein the cold working comprises cold rolling the aluminum alloy body into a sheet or plate. 19. The method of claim 1, wherein the aluminum alloy body comprises 3.5-6.0 wt. % magnesium and 2.5-5.0 wt. % zinc, where at least one of the magnesium and the zinc is the predominate alloying element of the aluminum alloy body other than aluminum, and wherein the ratio of wt. % Mg to wt. % Zn is from 0.6 to 2.40. 20. The method of claim 1, wherein the aluminum alloy body comprises 3.75-6.0 wt. % magnesium and 2.5-5.0 wt. % zinc, where at least one of the magnesium and the zinc is the predominate alloying element of the aluminum alloy body other than aluminum, and wherein the ratio of wt. % Mg to wt. % Zn is from 0.6 to 2.40.
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