The Boeing Company

John Michael Comfort

John G Vollmer

Mark A Fischer

Michael Leslie Hand

Ali Yousefiani

Joseph Andrew Querin

David M Bezaire

Daniel G Sanders

Jack William Mauldin

Larry Dean Hefti

Max Robert Runyan

Jason Franklin Joel

Brent C Ludwig

Max R Runyan

Larry D Hefti

Pin tool assemblies for friction stir welding and apparatus and methods that include the pin tool assemblies. The pin tool assemblies include an outer member, an inner member, and a stop. The outer member includes an inner surface that defines an elongate internal cavity and an external shoulder that includes an opening to the elongate internal cavity. The inner member includes a welding end, extends at least partially within the elongate internal cavity, and projects from the opening such that the welding end is external the elongate internal cavity. The pin tool assembly is configured to permit motion of the inner member relative to the outer member. The stop defines a plurality of stop configurations. Each of the stop configurations restricts motion of the inner member relative to the outer member in a stop direction to define a corresponding stop distance between the welding end and the external shoulder.

Pin tool assemblies for friction stir welding and apparatus and methods including the same

An integrated composite structure with a graded coefficient of thermal expansion (CTE) is formed by selecting a plurality of layers of materials with a graded CTE and using build-up (bottom-up) fabrication approaches such as metal deposition or powder metallurgy to produce a CTE-graded layered composite preform, which is then consolidated and heat treated to create the CTE graded integrated composite billet or near net shape. The integrated composite billet or near net shape is then processed to produce a first surface for attachment of a first structural member having a first CTE and to produce a second surface of for attachment of a second structural member having a second CTE.

Built-up composite structures with a graded coefficient of thermal expansion for extreme environment applications

A hybrid structure comprises a metallic built-up sandwich structure, and a monolithic superplastic formed and diffusion bonded structure joined to the built-up sandwich structure.

Hybrid structure including built-up sandwich structure and monolithic SPF/DB structure

A hole in a metal workpiece is filled by friction plug welding. The weld between the workpiece and the plug is reinforced by a weld land in the workpiece that surrounds one end of the plug. The weld land is formed by extruding a portion of the plug into a cavity in an anvil used in the welding process.

Reinforcement of friction plug welds

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Corona, CA, United States of America

John Michael Comfort