Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
January 20, 2009
Patent Application Number
11200397
Date Filed
August 8, 2005
Patent Primary Examiner
Patent abstract
A damage tolerant microstructure for a lamellar alloy, such as a lamellar γTiAl alloy, is provided in accordance with the present invention. The alloy comprises a matrix and a plurality of grains or lamellar colonies, a portion of which exhibit a nonplanar morphology within said matrix. Each of the lamellar colonies contains a multitude of lamella with irregularly repeating order. The γTiAl platelets have a triangular (octahedral) unit cell and stack with γ twins. The α2Ti3Al platelets are irregularly interspersed. The unit cell for α2Ti3Al is hexagonal. Each of the layers has a curved, nonplanar structure for resisting crack formation and growth.
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