David J Shoemaker

US Patent:

20120247623, Oct 4, 2012

Filed:

Apr 4, 2011

Appl. No.:

13/079633

Inventors:

Robert A. Matuska - Heath OH, US
David J. Shoemaker - Heath OH, US
Mory Shaarbaf - Spokane WA, US
Steve M. Williams - Greenville TX, US

International Classification:

C21D 11/00
G06F 17/50
C21D 9/00

US Classification:

148503, 148511, 148559, 700104

Abstract:

The homogenization cycle of an alloy is optimized and controlled by defining a target degree of transformation to achieve at least one metallurgical property for an alloy. The desired metallurgical properties include, but are not limited to, dissolving precipitation hardening phases, transforming insoluble phases into preferred phases and precipitating the dispersoid phases to the proper size and distribution. Using regression analysis, a transformation model is obtained to predict the degree of transformation of an alloy by analyzing the degree of transformation of a plurality of sample alloys subjected to heating at predetermine temperatures for predetermined amounts of time.

US Patent:

20190233921, Aug 1, 2019

Filed:

Feb 1, 2018

Appl. No.:

15/886189

Inventors:

- Foothill Ranch CA, US
Philippe Lassince - Albi, FR
Robert A. Matuska - Heath OH, US
Florence Andrea Baldwin - Mead WA, US
David J. Shoemaker - Heath OH, US
Ravi Rastogi - Liberty Lake WA, US
Roy A. Nash - Spokane WA, US

Assignee:

Kaiser Aluminum Fabricated Products, LLC - Foothill Ranch CA

International Classification:

C22C 21/16
C22C 21/18
C22C 21/14
C22F 1/057

Abstract:

The present invention is directed to aluminum-lithium alloys, specifically aluminum—copper—lithium—magnesium—manganese alloys. The aluminum-lithium alloy of the present invention comprises from 3.6 to 4.1 wt. % Cu, 0.8 to 1.05 wt. % Li, 0.6 to 1.0 wt. % Mg, 0.2 to 0.6 wt. % Mn, up to 0.12 wt. % Si, up to 0.15 wt. % Fe, from 0.03 to 0.16 wt. % of at least one grain structure control element selected from the group consisting of Zr, Sc, Cr, V, Hf, and other rare earth elements, up to 0.10 wt. % Ti, up to 0.15 wt. % incidental elements with the total of incidental elements not exceeding 0.35 wt. %, and the balance being aluminum. Preferably, Ag is not intentionally added and should not be more than 0.05 wt. % as a non-intentionally added element. Preferably, Zn is not intentionally added and should not be more than 0.2 wt. % as a non-intentionally added element. The amount of Cu in weight percent is at least equal to or higher than four times the amount of Li in weight percent.

US Patent:

20190003025, Jan 3, 2019

Filed:

Jul 3, 2017

Appl. No.:

15/640722

Inventors:

- Foothill Ranch CA, US
Robert A. Matuska - Heath OH, US
David J. Shoemaker - Heath OH, US

Assignee:

Kaiser Aluminum Fabricated Products, LLC - Foothill Ranch CA

International Classification:

C22F 1/057
C22C 21/18
C22C 21/16
C22C 21/14

Abstract:

A substantially Pb-free aluminum alloy consisting essentially of (in weight percent) Si