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:
Mar. 06, 2001
Filed:
May. 04, 2000
Applicant:
Inventors:
Yuntian T. Zhu, Los Alamos, NM (US);
Terry C. Lowe, Santa Fe, NM (US);
Honggang Jiang, Los Alamos, NM (US);
Jianyu Huang, Los Alamos, NM (US);
Assignee:
The United States of America as represented by the United States Department of Energy, Washington, DC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 1/06 ; B21D 3/02 ; B21D 1/304 ;
U.S. Cl.
CPC ...
B21D 1/06 ; B21D 3/02 ; B21D 1/304 ;
Abstract
A method of refining the grain structure and improving the hardness and strength properties of a metal or metal alloy workpiece is disclosed. The workpiece is subjected to forces that corrugate and then straighten the workpiece. These steps are repeated until an ultrafine-grained product having improved hardness and strength is produced.