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Friction Stir Welding of GR-Cop 84 for Combustion Chamber LinersGRCop-84 is a copper-chromium-niobium alloy developed by the Glenn Research Center for liquid rocket engine combustion chamber liners. GRCop-84 exhibits superior properties over conventional copper-base alloys in a liquid hydrogen-oxygen operating environment. The Next Generation Launch Technology program has funded a program to demonstrate scale-up production capabilities of GR-Cop 84 to levels suitable for main combustion chamber production for the prototype rocket engine. This paper describes a novel method of manufacturing the main combustion chamber liner. The process consists of several steps: extrude the GR-Cop 84 powder into billets, roll the billets into plates, bump form the plates into cylinder halves and friction stir weld the halves into a cylinder. The cylinder is then metal spun formed to near net liner dimensions followed by finish machining to the final configuration. This paper describes the friction stir weld process development including tooling and non-destructive inspection techniques, culminating in the successful production of a liner preform completed through spin forming.
Document ID
20040071041
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Russell, Carolyn K.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Carter, Robert
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Ellis, David L.
(NASA Glenn Research Center Cleveland, OH, United States)
Goudy, Richard
(Sprin Tech Paso Robles, CA, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2004
Subject Category
Mechanical Engineering
Meeting Information
Meeting: 45th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Location: Palm Springs, CA
Country: United States
Start Date: April 19, 2004
End Date: April 22, 2004
Sponsors: American Society of Mechanical Engineers, American Helicopter Society, Inc., American Society of Civil Engineers, American Inst. of Aeronautics and Astronautics, American Society for Composites
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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