The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 2015
Filed:
Feb. 04, 2011
Raymond F. Decker, Ann Arbor, MI (US);
Jack Huang, Ann Arbor, MI (US);
Sanjay G. Kulkarni, Livonia, MI (US);
Stephen E. Lebeau, Northville, MI (US);
Ralph E. Vining, Brooklyn, MI (US);
Raymond F. Decker, Ann Arbor, MI (US);
Jack Huang, Ann Arbor, MI (US);
Sanjay G. Kulkarni, Livonia, MI (US);
Stephen E. Lebeau, Northville, MI (US);
Ralph E. Vining, Brooklyn, MI (US);
Thixomat, Inc., Livonia, MI (US);
Abstract
A method of forming a wrought material having a refined grain structure is provided. The method comprises providing a metal alloy material having a depressed solidus temperature and a low temperature eutectic phase transformation. The metal alloy material is molded and rapidly solidified to form a fine grain precursor that has fine grains surrounded by a eutectic phase with fine dendritic arm spacing. The fine grain precursor is plastic deformed at a high strain rate to cause recrystallization without substantial shear banding to form a fine grain structural wrought form. The wrought form is then thermally treated to precipitate the eutectic phase into nanometer sized dispersoids within the fine grains and grain boundaries and to define a thermally treated fine grain structure wrought form having grains finer than the fine grains and the fine dendritic arm spacing of the fine grain precursor.