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. 07, 2006
Filed:
Jun. 02, 2003
Rinze Benedictus, Delft, NL;
Christian Joachim Keidel, Montabaur, DE;
Guido Weber, Andernach, DE;
Alfred Johann Peter Haszler, Vallendar, DE;
Rinze Benedictus, Delft, NL;
Christian Joachim Keidel, Montabaur, DE;
Guido Weber, Andernach, DE;
Alfred Johann Peter Haszler, Vallendar, DE;
Corus Aluminium Walzprodukte GmbH, Koblenz, DE;
Abstract
The present invention relates to a method for producing high strength balanced Al—Mg—Si alloy with an improved fatigue crack growth resistance and a low amount of intermetallics, comprising the steps of The pre-heating is preferably performed for 6 to 18 hours with temperatures between 530° C. and 560° C. The alloy has a fatigue crack growth rate at ΔK=20 MPa√m of below 9.0E−04 and at ΔK=40 MPa√m of below 9.0E−03, wherein the amount of intermetallics within the finally worked alloy product, according to the measured specific energy Delta H associated with the DSC signal, is below 1.5 J/g.