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Production of aluminum-lithium near net shape extruded cylindersIn the late 1980's, under funding from the Advanced Launch System Program, numerous near net shape technologies were investigated as a means for producing high quality, low cost Aluminum-Lithium (Al-Li) hardware. Once such option was to extrude near net shape barrel panels instead of producing panels by machining thick plate into a final tee-stiffened configuration (which produced up to 90% scrap). This method offers a reduction in the volume of scrap and consequently reduces the buy-to-fly cost. Investigation into this technology continued under Shuttle-C funding where four Al alloys 2219, 2195, 2096, and RX 818 were extruded. Presented herein are the results of that program. Each alloy was successfully extruded at Wyman Gordon, opened and flattened at Ticorm, and solution heat treated and stretched at Reynolds Metals Company. The first two processes were quite successful while the stretching process did offer some challenges. Due to the configuration of the panels and the stretch press set-up, it was difficult to induce a consistent percentage of cold work throughout the length and width of each panel. The effects of this variation will be assessed in the test program to be conducted at a future date.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Hartley, Paula J.
(Lockheed Martin Manned Space Systems New Orleans, LA, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1995
Subject Category
Metallic Materials
Report/Patent Number
NAS 1.26:198204
Accession Number
Funding Number(s)
PROJECT: RTOP 505-63-50-02
PROJECT: RTOP 506-43-31-08
Distribution Limits
Work of the US Gov. Public Use Permitted.
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