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US 9,850,556 B2Granted
Heat treatable aluminum alloys having magnesium and zinc and methods for producing the same
AssigneeArconic Inc.
InventorJen Lin
Life of this patent
Estimating the term…
Abstract
New heat treatable aluminum alloys having magnesium and zinc are disclosed. The new aluminum alloys generally contain 3.0-6.0 wt. % Mg, 2.5-5.0 wt. % Zn, where (wt. % Mg)/(wt. % Zn) is from 0.60 to 2.40.
Claims20
An aluminum alloy sheet product consisting of:
- 3.75-6.0 wt. % Mg;
- 2.5-5.0 wt. % Zn;
- wherein (wt. % Mg)/(wt. % Zn) is from 0.75 to 2.40
- up to 1.0 wt. % Cu;
- up to 0.5 wt. % Si;
- optionally at least one secondary element selected from the group consisting of Zr, Sc, Cr, Mn, Hf, V, Ti, and rare earth elements, and in the following amounts:
- up to 0.20 wt. % Zr;
- up to 0.30 wt. % Sc;
- up to 0.50 wt. % Cr;
- up to 1.0 wt. % Mn;
- up to 0.25 wt. % each of any of Hf, V, and rare earth elements;
- up to 0.15 wt. % Ti;
- up to 0.35 wt. Fe;
- and
- the balance being aluminum and other elements, wherein the aluminum alloy sheet product includes not greater than 0.15 wt. % each of these other elements, and wherein the total of these other elements does not exceed 0.35 wt. %;
- wherein the aluminum alloy sheet product is in the form of an automotive product or an aerospace product.
13 more elements
A method comprising:
- (a) casting an aluminum alloy into an aluminum alloy body, wherein the aluminum alloy body consists of:
- 3.75-6.0 wt. % Mg;
- 2.5-5.0 wt. % Zn;
- wherein (wt. % Mg)/(wt. % Zn) is from 0.75 to 2.40
- up to 1.0 wt. % Cu;
- up to 0.5 wt. % Si;
- optionally at least one secondary element selected from the group consisting of Zr, Sc, Cr, Mn, Hf, V, Ti, and rare earth elements, and in the following amounts:
- up to 0.20 wt. % Zr;
- up to 0.30 wt. % Sc;
- up to 0.50 wt. % Cr;
- up to 1.0 wt. % Mn;
- up to 0.25 wt. % each of any of Hf, V, and rare earth elements;
- up to 0.15 wt. % Ti;
- up to 0.35 wt. Fe;
- and
- the balance being aluminum and other elements, wherein the aluminum alloy sheet product includes not greater than 0.15 wt. % each of these other elements, and wherein the total of these other elements does not exceed 0.35 wt. %;
- (b) processing the aluminum alloy body into one of a W temper and a T temper, wherein the processing step (b) comprises solution heat treating and then quenching the aluminum alloy body.
14 more elements
Dependencies are inferred from the claim text.