# US 10,119,183 B2 · Heat treatable aluminum alloys having magnesium and zinc

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- Number: US 10,119,183 B2
- Document ID: US10119183B2
- Status: Granted
- Kind: B2
- Application number: 15/419,855
- Filed: 2017-01-30
- Published: 2017-05-18
- Granted: 2018-11-06
- Earliest claimed: 2013-02-19
- Assignees: Arconic Inc.
- Applicants: Arconic Inc.
- Inventors: Jen C. Lin; John M. Newman; Ralph R. Sawtell; Rajeev G. Kamat; Darl G. Boysel; Gary H. Bray; James Daniel Bryant; Brett P. Connor; Mario Greco; Gino Norman Iasella; David J. McNeish; Shawn J. Murtha; Roberto J. Rioja; Shawn P. Sullivan
- Web page: https://patentgrep.com/patent/US10119183B2

## CPC

- C22C 21/06: with magnesium as the next major constituent
- C22C 21/08: with silicon
- C22C 21/10: with zinc as the next major constituent
- C22F 1/047: of alloys with magnesium as the next major constituent
- C22F 1/053: of alloys with zinc as the next major constituent
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- C22F: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass, C23F17/00)

## Abstract

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.

## Claims

### Claim 1

A wrought aluminum alloy product comprising:
3.0-6.0 wt. % magnesium and 2.5-5.0 wt. % zinc, where the magnesium is the predominate alloying element of the aluminum alloy product other than aluminum, and where a ratio of wt. % Mg to wt. % Zn is from greater than 1.0 to 2.40;
wherein the wrought aluminum alloy product is predominately unrecrystallized;
wherein the wrought aluminum alloy product achieves a long-transverse yield strength of at least 50 ksi and a long-transverse elongation of at least 8%; and
wherein the wrought aluminum alloy product contains not greater than 0.03 wt. % lithium.

### Claim 2 (depends on 1)

The wrought aluminum alloy product of claim 1, wherein the wrought aluminum alloy product is at least 75% unrecrystallized.

### Claim 3 (depends on 1)

The wrought aluminum alloy product of claim 1, wherein the wrought aluminum alloy product achieves a long-transverse elongation of at least 10%.

### Claim 4 (depends on 1)

The wrought aluminum alloy product of claim 1, wherein the wrought aluminum alloy product achieves a long-transverse tensile yield strength of at least 55 ksi.

### Claim 5 (depends on 1)

The wrought aluminum alloy product of claim 1, wherein the wrought aluminum alloy product achieves a long-transverse tensile yield strength of at least 58 ksi.

### Claim 6 (depends on 1)

The wrought aluminum alloy product of claim 1, wherein the wrought aluminum alloy product achieves a long-transverse tensile yield strength of at least 60 ksi.

### Claim 7 (depends on 6)

The wrought aluminum alloy product of claim 6, wherein the wrought aluminum alloy automotive component achieves a long-transverse elongation of at least 11%.

### Claim 8 (depends on 6)

The wrought aluminum alloy product of claim 6, wherein the wrought aluminum alloy automotive component achieves a long-transverse elongation of at least 12%.

### Claim 9 (depends on 1)

The wrought aluminum alloy product of claim 1, wherein the wrought aluminum alloy product is in the form of an automotive component, and wherein the automotive component is selected from the group consisting of hood panels, fender panels, door panels, roof panels, trunk lid panels, body-in-white pillars and body-in-white reinforcements.

### Claim 10 (depends on 1)

The wrought aluminum alloy product of claim 1, wherein the wrought aluminum alloy product is a sheet product.