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. 18, 2003
Filed:
Dec. 17, 1998
Applicant:
Inventors:
Mohamed Nazmy, Fislisbach, CH;
Markus Staubli, Dottikon, CH;
Assignee:
Alstom, Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C 1/400 ;
U.S. Cl.
CPC ...
C22C 1/400 ;
Abstract
In a blade possessing a blade body and a blade foot consisting of an alloy based on a doped gamma-titanium aluminide, at least part of the surface layer of the blade has a finely-grained structure, and the core has a coarsely-grained structure. The ductility of the finely-grained surface layer is higher than that of the coarsely-grained core. In a method for producing the blade, the surface is deformed after casting and hot-isostatic pressing of the blade. The deformed surface layer undergoes recrystallization annealing.