Intermediate temperature thermomechanical processing of Al 2090 for superplasticityThe Al-Cu-Li phase diagram indicates that during thermomechanical processing of Al 2090 at 300 C both T(1) and T(2) phases will precipitate. Following work on Al-Mg-X alloys, it is possible that TMP at such temperatures might promote intragranular formation of these phases and promote microstructural refinement during recrystallization. Microstructural analyses reveal that the T(2) phase in Al 2090 may play a similar role to the beta-phase in Al-Mg-X alloys during microstructural evolution. Mechanical property data indicate that Al 2090 can be moderately (215-245 percent) superplastic at 370 C following processing at 300 C.
Document ID
19910059170
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hales, S. J. (NASA Langley Research Center; Analytical Services and Materials, Inc. Hampton, VA, United States)
Mcnelley, T. R. (U.S. Naval Postgraduate School Monterey, CA, United States)
Groh, G. E. (U.S. Navy Washington, DC, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1989
Subject Category
Metallic Materials
Meeting Information
Meeting: International Aluminum-Lithium Conference