Arconic Corporation

Alcoa USA Corp.

Other

Alcoa Inc.

Arconic Technologies LLC

Howmet Aerospace Inc.

James Daniel Bryant

Jen C Lin

Xinyan Yan

Wenping Zhang

Dirk C Mooy

Ralph R Sawtell

Roberto J Rioja

John Newman

Rajeev G Kamat

Gary H Bray

Shawn J Murtha

Shawn Patrick Sullivan

David J McNeish

Darl G Boysel

Gino Norman Iasella

Mario Greco

Colleen Elizabeth Weller

Eider Simielli

Cyril F Bell, Ii

Barbara Lucille Hyde

Dana Clark

Brett P Connor

Colleen E Weller

Zachariah D Meissen

James Thomas Wilson

Coleen E Weller

New shape-cast 7xx aluminum alloys products are disclosed. The new shape-cast products may include from 3.0 to 8.0 wt. % Zn, from 1.0 to 3.0 wt. % Mg, where the wt. % Zn exceeds the wt. % Mg, from 0.35 to 1.0 wt. % Cu, where the wt. % Mg exceeds the wt. % Cu, from 0.05 to 0.30 wt. % V, from 0.01 to 1.0 wt. % of at least one secondary element (Mn, Cr, Zr, Ti, B, and combinations thereof), up to 0.50 wt. % Fe, and up to 0.25 wt. % Si, the balance being aluminum and other elements, wherein the aluminum casting alloy include not greater than 0.05 wt. % each of the other elements, and wherein the aluminum casting alloy includes not greater than 0.15 wt. % in total of the other elements.

7XX aluminum casting alloys, and methods for making the same

New 6xxx aluminum alloy sheet products and methods of making the same are disclosed. The new methods may include preparing a 6xxx aluminum alloy sheet product for solution heat treatment, solution heat treating and then quenching the 6xxx aluminum alloy sheet product, and then exposing the 6xxx aluminum alloy sheet product to a treatment temperature of from 30&#xb0; C. to 60&#xb0; C. for 0.2 to 300 seconds. After the exposing step, the 6xxx aluminum alloy sheet product may be coiled and then placed in an ambient environment. Due to the post-quench heating and subsequent exposure to ambient, a preselected amount of Newtonian cooling may be induced, thereby creating a unique and consistent microstructure within the 6xxx aluminum alloy sheet products.

6xxx aluminum alloys and methods of making the same

New 7xx aluminum casting alloys are disclosed. The aluminum casting alloys generally include from 3.0 to 8.0 wt. % Zn, from 1.0 to 3.0 wt. % Mg, where the wt. % Zn exceeds the wt. % Mg, from 0.35 to 1.0 wt. % Cu, where the wt. % Mg exceeds the wt. % Cu, from 0.05 to 0.30 wt. % V, from 0.01 to 1.0 wt. % of at least one secondary element (Mn, Cr, Zr, Ti, B, and combinations thereof), up to 0.50 wt. % Fe, and up to 0.25 wt. % Si, the balance being aluminum and other elements, wherein the aluminum casting alloy include not greater than 0.05 wt. % each of the other elements, and wherein the aluminum casting alloy includes not greater than 0.15 wt. % in total of the other elements.

7xx aluminum casting alloys, and methods for making the same

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.

Heat treatable aluminum alloys having magnesium and zinc

The present disclosure relates to methods for producing new 6xxx aluminum alloy sheet products having tailored precipitate phase particle size distributions. The tailored precipitate phase particle size distributions may be produced by preparing a 6xxx aluminum alloy sheet for precipitate phase modification, and then modifying an initial precipitate phase particle size distribution of the material. The modifying may include heating the intermediate gauge strip to a temperature of from 440&#xb0; C. (825&#xb0; F.) to 500&#xb0; C. (932&#xb0; F.) and for a time sufficient to create a modified strip product having a modified (tailored) precipitate phase particle size distribution. The modified strip product may realize improved properties.

6XXX aluminum alloy sheet products and methods for making the same

6xxx aluminum alloy sheet products and methods for making the same

New methods for aging aluminum alloys having zinc and magnesium are disclosed. The methods may include first aging the aluminum alloy at a first temperature of from about 310&#xb0; F. to 530&#xb0; F. and for a first aging time of from 1 minute to 6 hours, and then second aging the aluminum alloy at a second temperature for a second aging time of at least 30 minutes, with the second temperature being lower than the first temperature.

Methods for artificially aging aluminum-zinc-magnesium alloys, and products based on the same

Heat treatable aluminum alloys having magnesium and zinc and methods for producing the same

New methods for aging aluminum alloys having zinc and magnesium are disclosed. The methods may include first aging the aluminum alloy at a first temperature of from about 330&#xb0; F. to 530&#xb0; F. and for a first aging time of from 1 minute to 6 hours, and then second aging the aluminum alloy at a second temperature for a second aging time of at least 30 minutes, with the second temperature being lower than the first temperature.

A method is taught for converting metal contaminants in the soil to less toxic forms as well as permitting their removal from groundwater. A first reactive solution comprising ferrous sulfate and an acid selected from the group consisting of sulfuric acid and phosphoric acid is injected to decomplex contaminants and precipitate them as insoluble compounds. A second reactive solution comprising hydrogen peroxide, and an acid selected from the group consisting of sulfuric acid and phosphoric acid is then injected to destroy organic liquids and enhance decomplexation. The pH of the first solution may range from 3 to 5, and the pH of the second solution range from 3 to 7, preferably 5 to 7. The process is particularly effective where chromium compounds such as hexavalent chromium are the contaminants.

In-situ chemical oxidation-reduction and precipitation of heavy metals in soils and groundwater

Growing community of inventors

Murrysville, PA, United States of America

James Daniel Bryant