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:
Feb. 20, 2018
Filed:
Aug. 01, 2016
The United States of America, As Represented BY the Secretary of the Navy, Washington, DC (US);
Ronald L. Holtz, Lorton, VA (US);
Derek Horton, Alexandria, VA (US);
The United States of America, as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A non-destructive method for assessing the 'degree of sensitization' of ship structures formed from aluminum-magnesium marine service alloys. Features of the method include (1) selective etching of beta phase in a sensitized aluminum-magnesium alloy (2) metallographic recording of the etched surface; (3) image enhancement to produce high-contrast binary images of etched and unetched areas; (4) image analysis of the enhanced images using line segments along grain boundaries to provide statistical information about the grain boundary beta phase percentage and (5) calibration, whereby the grain boundary beta phase percentage is converted to an expression of the degree of sensitization in the sample.